Jiskha Homework Help Biology High School

Science

Recent Questions

science
Examine the scenario. A child starts at a position of 2 m east of his house. He moves 1 m south, 5 m west, and then 1 m north. What is his displacement for this trip? 3 m west 5 m west 1 m north 7 m A?

Geometry and using Pi
How big was the Flying Saucer? In the 1951 science fiction movie classic The Thing from Another World, a group of scientists and soldiers discover a recently crashed alien spaceship buried under a few feet of ice near the North Pole. The party spreads out to determine the size...

science
What is a measurement that includes both a magnitude and a direction known as? vector quantity magnitude scalar quantity volume A?

science
A lizard accelerates from 2m/s to 10m/s in 4 seconds. What is the lizard's average velocity?

Science
Practical of Newton's second law Of the platinum book of grade 11 page 30

science
A uniform meter rule is balance at 30cm mark when of 50grams is hanging from its zero cm mark.calculate the weight of the rule?

science
Which options accurately identify an issue that could arise if no ethical guidelines were in place to guide the way research studies are presented to the public? (Select all that apply) Scientists could refuse to publish results they do not like. The publishers of journals ...

science
Which options accurately identify an issue that could arise if no ethical guidelines were in place to guide the way research studies are presented to the public? (Select all that apply) Scientists could refuse to publish results they do not like. The publishers of journals ...

science
In order to present information to a technical audience, what should a scientist do? avoid technical jargon use interesting metaphors be as wordy as possible in conveying ideas use a highly structured format D?

science
Which options accurately identify a characteristic that describes scientific journals? (Select all that apply) peer reviewed found mainly in university libraries published on a regular basis generally given out for free to any interested person A,B?

science
Which options accurately identify a reason why it could be beneficial for the government to regulate scientific research and the distribution of information? (Select all that apply) The government could minimize fraudulent practices. The government could ensure research is ...

Science
A uniform half metre rule is balanced horizontally across a knife edge placed 20cm from A. A mass of 22.5g is hung from end A. 1. What is the mass of the rule 2. What is the force exerted on the rule by the knife edge?

science
PLZ HELP GO TO MY NONRENEWABLE AND RENEWABLE QUESTION

science
hello i need help Problem How could renewable energy sources be used in a house? Devise a Plan 1. Consider what you learned about renewable energy sources. Use what you learned to design a house that operates entirely on renewable energy sources. Focus on three major needs: (1...

science
After reading the article “The Land Blew Away,” reflect back on the accounts of the people who witnessed the Dust Bowl. Write a paragraph in reaction to the survivors’ stories as well as your thoughts on what it might have been like to experience a dust storm. As you ...

Materials Science and Engineering
We know from literature that a certain material “A” exhibits an electrical conductivity of σ=100 S/cm at room temperature. However, we would like to confirm this value by performing electrical conductivity measurements in our labs. To perform these experiments we obtain a...

Science
Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? 1)denitrification 2)nitrogen fixation 3)producer uptake of nitrogen 4)consumer decomposition I think #3 Thank you.

Science
Earths History unit test 8th grade Under which of the following conditions would a fossil most likely form?

English
1. learning subjects: English, math, science, etc. 2. subjects to learn:English, math, science, etc. 3. studying subject:English, math, science, etc. 4. subjects learning:English, math, science, etc. 5. taking subjects:English, math, science, etc...

Science
Draw a transverse wave with a frequency of 5 wavelengths per second.

Materials Science and Engineering
Energy dispersive x-ray spectroscopy (EDX) is a commonly used characterization technique in Materials Science to determine the elemental composition of materials. To do this, EDX measures the emitted characteristic x-rays from materials (e.g. Kα), generated due to the ...

Science
URGENT! How is Miami's summer solstice different from Singapore's summer solstice?

science
Which options correctly identify a section or part of a typical laboratory report? (Select all that apply) materials procedure acknowledgements objective A,B,D?

geography ,life science ,history, and math lit
which career path can ii fit iin wiith these subjects.... ii desperately need the answer ASAP💯

science (circuits)
A students finds a resistance in a transistor radio. When the resistance is connected to a battery of 1.5 volts, the current is 0.0025 amperes. When the resistance is connected to four batteries with a voltage of 1.5 volts, the current measures to be 0.1 amperes. When the ...

Science/Astronomy
If dark energy were to significantly increase or decrease, what outcome could this have on the universe?

Science plz help
stop cheating this IS WHAT YOU GET Descarte describes how he held up a large sphere in the sunlight and looked at the sunlight reflected in it. He wrote "I found that if the sunlight came, for example, from the part of the sky which is marked AFZ and my eye was at the point E...

science
Which options accurately identify a reason why it could be beneficial for the government to regulate scientific research and the distribution of information? (Select all that apply) The government could minimize fraudulent practices. The government could ensure research is ...

science
Read the statement and then apply it to the scenario. Statement In science, it is not possible to prove hypotheses right. This is not the fault of scientists and their experiments; the scientific method is only able to tell scientists if their hypotheses are incorrect. ...

science
In order to write for the general public, what should a scientist do? (Select all that apply) describe detailed experimental methods use technical jargon use metaphors, games, or stories determine the level of knowledge of the audience C, D?

science
Which options correctly identify a feature of a scientific report that would suggest the report reflects scientific thinking? (Select all that apply) uses inductive or deductive reasoning shows strong evidence of research bias contains arguments that use the data collected ...

science
When an electric current is passed through water during the process of electro says two gases are formed when gases boiling point of negative one hundred and three degrees Celsius and the other has a boiling point of negative two hundred and fifty degrees Celsius as a physical...

Environmental Science
What is an extreme thermophile? Thank you!

physical science
Hi, I need to do an experiment in physical science (I'm in connections academy which is online) and I don't have all of the materials to do it. I did the part I have the materials for but I need to hang a ruler or meterstick off the side of a table with 20, 40, and 60 cm ...

Science
A boy walks 100 m north then walks 50 m east and then 80 m south. Calculate the net displacement.

science
24g of magnessium burn in air to form magnessium oxides as show below. 2Mg+o²=2Mgo how much magnessium oxide is found in the product.

Science
6.A scientist is studying a plant species in which the flower color genes are codiminant. The scientist crosses a plant with red flowers and a plant with white flowers. The offspring will most likely have.. A. Red flowers B. White flowers C. Pink flowers D. Red flowers with ...

math /science
how do I convert 2.56m/s^2 to km/s^2

Science
When an electric current is passed through water during the process of electro says two gases are formed when gases boiling point of negative one hundred and three degrees Celsius and the other has a boiling point of negative two hundred and fifty degrees Celsius as a physical...

Science
If a man travels 2 km towards east and returns back 1 km. What is the displacement?.

Science
 Which of these contains the most tightly packed matter particles? (1 point) A. tea B. carbon dioxide C. a milkshake D. cardboard

Science
If an object is buoyant then it will (1 point) A.float. B.sink. C.attract metal. D.loses it's shape.

science
Suppose that you and a friend decide to use two different methods to make popcorn for a snack. Your friend uses a hot-air popcorn popper. You put a bag of microwave popcorn into a microwave oven. Use what you know—about radiation, conduction, and convection—to explain how ...

science
Suppose that you and a friend decide to use two different methods to make popcorn for a snack. Your friend uses a hot-air popcorn popper. You put a bag of microwave popcorn into a microwave oven. Use what you learned in the lesson—about radiation, conduction, and convection...

Science
You make a terrarium for your school’s science fair by putting some soil into a glass container and adding small plants. You moisten the soil with water and add a slug. You cover the terrarium with clear plastic that has vent holes. Then, you place the terrarium in a sunlit ...

Science Chemical Reactions
1. The current atomic model would be revised if  (1 point) A• better microscopes were being used to study its structure. B• better microscopes are invented in the future. C• new information about an atom’s structure is discovered. C• a new element is discovered in ...

Science
In approximately what year did oil and gas become the dominant fuels for the US? 1880 1910 1940 1970 2000

Science
What causes seasons

Science
What does H2O stand for in science

Science
what is the function of the small intestin?

Science
What happens to air and water during the steps of cloud formation?

Science
The earth is in constant motion. It rotates and revolves. Which of the following is NOT TRUE of the Earth's motion? 2 points A Due to the revolution of the Earth, we experience seasons. B The Earth rotates on its axis once every 24 hours. This causes day and night. C The ...

Science
Hello. I am trying to figure out how to solve polygenic Punnett squares. In order to get extra credit on a test, I have to learn how to use them. I've tried looking at images and tutorials, but I'm still confused.

Science
Name ONE of the air masses that can be found in North America (remember to use both the temperature and humidity descriptors). I searched everywhere, even looked back at my lesson, and I still can't find out, if you can help me or send me a link, I will be very grateful

Science
Three isotopes of hydrogen

Science
Distance 55 m time 10.30 am and distance 255 m time 10.32 am. Find the avg. Speed. Plz advice how total time is being calculated.

Technology
Michaela has been tracking the temperatures of dirt , pond water, and air near her home for a science investigation. She is ready to analyze the data to prepare for her science report. Based on each applications strengths and weaknesses, which one would be the best to choose ...

SCIENCE
A sphere of mass 50g and diameter 20cm is rolling with a speed of 5cm/sec . What will be its its total energy.

....science
1. An example of a geologic event that could be recorded in rocks is ____. (1 point) a civil war the occurrence of sun spots a volcanic eruption a lunar eclipse 2. "The present is the key to the past." This statement rephrases the ____. (1 point) principle of cross-cutting ...

Science
I am doing a project right now and I'm kind of confused. I did an experiment and this is a question asked "Scientists changed the independent variable to learn about the Mpemba Effect. What did you learn from your results? Do you agree that the Mpemba Effect is real?" I did an...

Science
If an organism is heterozygous for a particular trait, the organism. A.has the same allele on both chromosomes in a chromosome pair. B.has different alleles on the chromosomes in a chromosome pair.* C.is missing alleles on the chromosomes in a chromosome pair. D.has extra ...

science
How can we remove temporary as well as permanent hardness of water by permutit process?

science
What is equinox?

Science
1. A body is moving along a circular path of radius R. What will be the distance covered and the displacement of the body after half a revolution? 2. A person starts from his house and travels a circular distance of 15 km around the walled city before returning back. What is (...

Science
What gets wetter and wetter the more it dries?

science
Which option accurately describes scientific theories? (Select all that apply.) are descriptions of phenomena that can be observed to consistently happen over and over again are testable questions that can be investigated through experimentation have withstood the testing of a...

Science Chemistry
How do I make an electron dot diagram for MgO? (

science
1. The key ingredient in chocolate; grinding the beans of the cacao tree produces chocolate liquor, which yields cocoa butter and cocoa powder. 2. The key ingredient in chocolate; grinding the beans of the cacao tree produces chocolate liquid, which yields cocoa butter and ...

science
Examine the situation. Gregor Mendel wondered how traits were inherited, but the technology to study genes was unknown. By crossing pea plants and observing their traits, he concluded that the traits of living organisms are controlled by structures called genes each gene is ...

science
Which option correctly demonstrates scientific thinking in practice? The lava flowing from a volcano is very hot because its temperature has been measured to be over 1,000 ºC. The lava flowing from a volcano must be very hot because it is a liquid. The lava flowing from a ...

science
Define inductive reasoning. answering questions by analyzing specific observations and using them to come to a more general understanding doubting or not accepting conclusions or ideas until they have been adequately tested and verified answering questions based on what can be...

science
Determine the CFU/ml if 1 ml of the 10-5 dilution is plated and 372 colonies are present following incubation. Thank you!

science
Which option correctly defines a scientific theory? an explanation for observable facts that is supported by experimental evidence a scientist’s best guess, or assumption, about the cause of a problem a process of carrying out specific, well controlled tests in order to ...

science
The temperature in the room is rising because the explosion is releasing _____ energy into the air, increasing the speed of the air molecules in the room.

science
For the human body to function correctly, the right amount of sugar must be present in the blood. Several hormones are produced by the body as part of a mechanism to counteract changes in blood sugar so that the amount of sugar remains relatively constant. Which characteristic...

science
What was the big Bang theory? How did scientist learn about it? Why is it so important today?

English
Subject names at school are as follows. math,science, social studies, computer science,etc. ----------------------------------------​----------- Can we use 'information' instead of 'computer science' as a subject name?

Science
#3) A person with trisomy 21 has an extra copy of chromosome 21. What happened during meiosis that caused the person to get three, instead of two, copies of chromosome 21? A) nondisjunction B) genetic recombination C) Binary fission D) Crossing Over I'm thinking that sounds ...

Science
Calculate the POH of a solution when H+ and PH is given

Science
An ideal solution made up of benzene C6H6 and toluene C6H5CH3 has mole fraction of benzene as 0.025,0.5,0.75,1.0 at various concentration. calculate the molar fraction of toluene Calculate the total vapour pressure of the solution at these concentration??

science
find the acceleration due gravity on the surface of Neptune. given that mass of Neptune is 16.7 times that of the earth and the radius of Neptune is 3.89 times that of the earth (Re = 6380 km )

Science
Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 m above earth's surface is it c object's acceleration due to gravity is less on the moon

Science
Acetic acid(CH3O2H) reacts with isopentyl alcohol (C5H12O) to yield isopentyl acetate acetic acid with isopentyl alcohol is 45%,how many grams of isopentyl acetate are formed from 3.5g of accetic acid and 4.75g of isopentyl alcohol? The reaction is ;

Science
A 50.0ml of volume silver nitrate solution contains 0.0285 moles of silver nitrate, what is the molarity of silver nitrate

Science
A simple of oxygen gas at room temperature and 1.03atm occupies a volume of 22dm³. Find the volume of the oxygen gas at STP?

Science, chemistry
Electrophilic substitutions reaction of pyrrole

Science
I am a world of five letter People eats me If u remove my first letter i will be a form of energy If u remove my 2nd i will be needed 4 living If u remove my 3rd letter i will be a preposition If u remove my 4th letter i will be frink 4 u Ans if u r mastermind !

science
A boy moves 100m towards North then 70 my towards East then what is its displacement

English
At the end of "Science and the Sense of Wonder," Asimov notes that everything he has described was discovered after Walt Whitman's time. Imagine that Whitman had known about all those discoveries. Would he have felt differently about astronomy? In a paragraph, respond to that ...

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1. A Diameter of the driven pulley. B the power in kW that can be ...

Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1

science
1 which of the following gases was most likely present in earths earliest atmosphere 1.b 2.b 3.a 4.b 5.b 6.true 7.false

Science Help
Place the following words into the illustration below gametes, sporophyte, gametophyte, and zygote. Explain how the terms are related. MY ANSWER 1. sporohyte 2. gametes 3. gametophyte 4. zygote I just need to explain my answer but I do not know how to. Please help me!!!

science
I need help with finding some sources of error! My experiment is that there is one candle lit and five different sizes of beakers being upside down onto the candle (one at a time) and seeing how long it takes for the candle to burn out for each beaker. I already have one but ...

Science
What would you do to measure the volume of a baseball? I've checked my notes and even opened my book! Please help! (I don't think I need a formula yet, I'm not being taught them in Science)

English
We were brought up together; there was not quite a year difference in our ages. I need not say that we were strangers to any species of disunion or dispute. Harmony was the soul of our companionship, and the diversity and contrast that subsisted in our characters drew us ...

Science
How is velocity different from speed?

Science
Which of the following is true about the atom shown? Choose all that apply. its unstable it is stable it belongs to group 10 it belongs to group 18

Science help
1.The current atom model would be revised if a.better microscopes were being used to study* b.better microscopes are invented in the future c.new information about atoms are discovered d.a new element is discovered in the future

Science help
I really need help on the chemical reactions unit test 8b unit 1

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10th Grade

10th Grade Chemistry
I struggle in the sciences and was wondering what I could do over the summer self studying wise to prepare for 10th grade chem?

10th grade
what classes should i take in 10th grade?

10th grade
how i get an unssen workssheets for 10th greade?

11th grade
The students of litchfield High school are in grades 9,10,11,12. Of the students , 1/4th are in 9th grade, 1/3rd are in 10th grade, 1/6th is in 11th grade and there are 300 in the 12th grade, how many students are there all together?

English
1. What day is your birthday? - It is June 14th. - It is the second Monday. 2. When is your birthday? - It's this Friday. - It is on January 10th. - It is January 10th. 3. What date is your birthday? - It is January 10th. - It is on January 10th. ----------------------- ...

math
Riding on a school bus are 20 students in 9th grade, 10 in 10th grade, 9 in 11th grade, and 7 in 12th grade. Approximately what percentage of the students on the bus are in 9th grade?

10th
i am just abt to finish my 10th grade,i am very weak at maths and science,hence i have opted to take economics. 1.is this the right choice? 2.is there goin to be maths in it? 3.what are the core subjects involved?

10th grade
i need an interesting topic for a tenth grade informative essay

10th grade
plz suggest me some good thoughts which i can use in writing compositions in my 10th board exams which is on the 3rd of march. as in slogans,or some quotations or what ever material which will make my composition interesting. thanx!!

english
- Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st Grade - 2nd Grade - 3rd Grade - 4th Grade - 5th Grade - 6th Grade - 7th Grade - ...

10th grade
Ravi resigned----------illness

10th grade chemistry
How many grams of kno3 can be dissolved in 100g of h2o at 50°c

algebra 10th grade
Solve for x? 0 = -9/5 x -9

ALL subjects..
Hi!! Well,I'm in tenth grade And I was wondering if there are any practice test websites for the 10th grade Test.. I believe Pct? Please!! Help..

science-biology
I am in 10th grade and can you please help me by defining what is bio-catalysts?

10th grade Math --Shadow-Pull questions
AC=12 Db=32 AD=x

math
a student is selected at is the probability the the randomly selected stundent is neither a 10th grade nor an 11th grade express your answer in fraction in simplest form

10th grade math help
How do you solve? 3-3sinx-2cos^2(x) = 0

10th grade
If ab=6y & bc=8y What is BD In Terms Of Y.??

10th grade Chemistry
What is the hydroxide ion concentration in a solution with [H3O+] = 7.67*10^-9 M?

10th grade
2x-y=-5 -2x-5y=11

10th grade
What influences did the colonies have on the imperialist nation

10th grade
if AB=3x-2 and BC=x+6, what is x?

10th grade
change 114/8 to a mixed fraction in simplest form

10th grade english
what is a one sentence summation of plot

10th grade
whats the answer to 54x2y - 12x2y2

10th grade
What is the role of the state governments under the articles of confederation?

English, 10th grade
What are 2 complications in the novel, The Plague by Albert Camus?

10th grade geo
answers to objective 3-c algebra with pizzazz

10th grade
If m<pqs=3x+13and m<sqt=6x-2,

10th grade
why does Henry believe that compromise with the British is not a workable solution?

10th grade
What is the compound name fo HC2H3O2?

10th grade
BC=3x+2 and CD= 5x-10. Solve for x.

10th grade
a rock with a mass of 8kg falls from a height of 7m what work was done

10th grade
How do I answer and graph this problem 4x + 3y = 4

10th grade
HOW DO YOU YOU ADD ALL THE HEARD MATH WITH THE EASY

10th grade
what is the thrid possible lenghts of 4in.and 7in.

10th grade
how do I write and start a two voice poem?

10th grade
--> BD bisects <adc, m<1=5x-3, and m<2=x+25. find the value of X

10th grade
What is characterization of the Stranger in "War Prayer"?

10th grade
how would you use the word civility in a sentence

10th grade
3 points on a line Q,P,R (In order) if QP =2x and QR =2x+1 and PR =21 Solve for x

10th grade
Evaluate u + xy, for u = 18, x = 10, and y = 8. a. 188 b. 224 c. 98 d. 36

10th grade
analyze the responses to the spread of buddhism in china

10th grade Chemistry
The most reactive group of the nonmetal are the?

10th grade
Write each power as a product of the same factor. 5^4 a. 5 × 5 × 5 × 5 b. 4 × 4 × 4 × 4 × 4 c. 5 × 5 × 5 × 5 × 5 d. 5 × 5 × 5 My answer c.

10th grade
how do i solve X2 +4X-60 (the 2 after the x is supposed to stand for squared.)

10th grade
for which value of n will the function 4/9 and n/27 be equivalent?

10th grade math
how do i solve for y in the equation -5y(6y - 6) - y = -4(y - 5)

10th grade
3x-2-x=7-x

10th grade
I need help with this problem. (b+7)(b+1) .

10th grade
i need help asap w. number patterns

10th grade
perimeter of a regular pentagon with side measurements of 57 centimeters

10th grade
can anyone write an article on topic-education for all?

10th grade
in caesar how do the workman celebrate as the play begins

10th grade
resources are being used up at a faster rate than they can be replaced

10th grade
If you heat a 5 L balloon from a temperature of 250 C to 500 C , its me volume will be?

10th grade
A pentagon with the a perimeter of 45 feet?

10th grade
what is the molarity of 5.00 g of Na2CO3 dissolved n 400.0 mL solution?

10th grade
(2u+9)(2u+1)

5th grade
what's "n to the 10th is 27" in a algebraic expression?

10th grade
x squared-13x+36/x-9 equals what dividing polynomials

10th grade
2y^2*3xy^3 divided by 3x^2y^4

10th grade
(-7+p)(8+p)

10th grade biology
what are two distinguishing characteristics of prokaryotes?

10th grade
determine m given that m>0 and the points (m,3) and (1,m) lie on a line with slope m

10th grade
how does electric discharge affect the society?

10th grade
what is the conjugated base of H2SO3

10th grade
a{n}=n(3n+5)

10th grade
how to start a comparative genra essay

10th grade
radio 5 to 3 how many of each one totals 4000?

10th grade biology
What is the effect of Prozac on OCD, falling in love

10th grade
Find the measure of diameter AC if BP=x and AC=5x-6

10th grade
How do you balance solubility equation problems?

10th grade
how do you balance bic

10th grade
5radical8\2-radical 3

10th grade
how do you add a fraction with a different denominator

10th grade
how to simplify radicals

10th grade
How does microbiology affect a person on a daily basis?

10th grade
wat is the anwser to Que hacen usteds alli?

10th grade
find the slopes for all four side J(-4,-1) K(-7,-4) L(2,-10) M(5,-7)

10th grade
IPC Balancing Equations???

10th grade
find the slope of the line that passes through 3 1/2,2 and -1,1/2

10th grade
How can you graph the distance between y = -3/4x - 1 3x + 4y = 20

10th grade algebra
2b/4 + b/3 = 10 solve for b.

10th grade algebra
solve for x. |x+9|=17

10th grade algebra
solve for n. |3n+5|=7

10th grade algebra
2b/4+b/3=10 solve for b.

10th grade algebra
solve the equation 2a=3a+4c for a

10th grade algebra
solve the equation 2x+y=9 for y

10th grade algebra
solve the equation for x: 3x+y=6

10th grade
IF YOU LEAVE AN APPLE OUT FOR A LLONG TIME .WHAT WILL HAPPEN?

10th grade,history
what attitudes toward native americans does this express?

10th grade
-8(-3-4 v)+5(5v+2)=-80 solve for v

10th grade
reduce each rational expression into lowest terms. 2y+4/3y+6

10th grade
Meaning of tool used to measure length?

10th grade
explain how to add measurements of segments 18.4 4.7 p to q to s

10th grade
5x+6/10+=4x-8/6

10th grade
i need help in common law

10th grade
How do u do (3x)cubed

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