Chemistry Middle School

During photosynthesis, plants take in carbon dioxide and release oxygen. During respiration, animals take in oxygen and release carbon dioxide. This is a cycle because:

Answers

Answer 1

Answer:

It is being repeated and its not stopping

Answer 2

Answer:

events can be predicted

Explanation:

I do Calvert school and for some reason I don't have that answer, but I just got the answer its up above.

Related Questions

A balanced chemical equation has the same number and type of atoms in the reactants as compared to the products. An unbalanced chemical equation does not. True or false?

Answers

False because they both have different properties

Kyla was skiing in the mountains with her family for spring break. As she was soaring down the ski slope, she tripped and fell into the snow. She took her gloves off and picked up a handful of snow.

what kind of heat transfer

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i’m pretty sure it is conduction since they were in contact

The answer is conduction

please hellllllppppppp

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The third one is not true

Answer:

c is correct i think sorry if wrong

Explanation:

what are ionic compound substances?

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an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding the compound is neutral overall but consists of positively charged ions called cations and negatively charged ions called anions

Answer:

In chemistry, an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions

what force is needed to give a 4.5 kg bowling ball an excelleration of 9 m/s2?

0.5 N

2 N

36.5 N

40.5 N

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It’s the last one my g

HELP ME!!
How many people prefer pepperoni or tomato as a topping?

Answers

Answer:

375

Explanation:

325 + 50 = 375

just add them together and you get 375

answer: 375

I think all you do is add the pepperoni and tomato together, and you’re done! :D

What does a neutralization reaction produce?
A. Acids
B. Bases
C. water and Salt
D. carbonated water

Answers

Answer:

hope this help....

Explanation:

Neutralization is the reaction of an acid and a base, which forms water and a salt. Net ionic equations for neutralization reactions may include solid acids, solid bases, solid salts, and water.

Answer:

Explanation:

The liquid in your stomach has a pH of about 2, so it is ________.I
A. an acid
B. a base
C. Neutral

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Answer:

A. an acid

Explanation:

Answer:A because I said so.

List three musical elements that will help you identify Jazz in the future.please

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Answer:

blues, syncopation, swing

Explanation:

does an object that feels cold to the touch contain thermal energy? explain your answer.

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YES - explained (Temperature is an average of the kinetic energy isn't it? Thermal energy is the total. So you could have a really big "cold" object and it would have more energy then say a small "hot" object. But the average energy of the hot object would be greater than the average of the cold object. "You only need to know the amount of thermal energy a body contains to calculate its temperature" -You need to know something about the size of the objects and the particles that made it up? "The object contains less thermal energy than your hand" -It could be a large cold object, so it could have a greater amount of energy but over a larger area, so it's just the temperature that is lower. I've only studied thermodynamics a little, but I think that's sorta right...)

An an object that feels cold to the touch contain thermal energy is true.

What is heat flow?

Flow of heat takes place when from the hotter body to the colder body in order to attain the equilirium.

When an object feels cold after touching any cold material means that object contains the thermal energy and by touching that material heat or thermal energy transfer from the object to the cold material. If the ocject itself is cold or does not having thermal energy then in this condition they will not feels cold.

Hence given statement is true.

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When a base is dissolved in water, what is released?
A. H+
B. OH−
C. CO2

Answers

Answer:Your answer is B

Hope this helps have a great day<3

Explanation:

your answer would be B. have an amazing day!!

Which two types of particles exist in equal numbers in an atom? protons and electrons protons and neutrons protons and photons electrons and neutrons

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Protons and neutrons

Many of these form hydroxide ions in a solution and lower the concentration of hydrogen ions when dissolved in water.
A. acid
B. base
C. enzyme
D. pH

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It’s a

Have a good day

A spacecraft is flying away from the moon toward earth. What will be true of the moon’s gravitational pull on the spacecraft? Will get the most brainliest

A. It will decrease
B. It will increase
C. It will repel the spacecraft
D. It will remain the same

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The answer is c or a because coming down from earth can lead to fire

The answer would be A. It will decrease

PLEASE HELP ME!!! I WILL GIVE BRAINLIEST!!

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greatest is at W because kendrick is still and it’s at the highest point.. x has greatest gravitational because it’s closest to the ground.. potential energy is at Z because it’s going straight so it’s stil moving

1. The roller coaster will have the most kinetic energy at point X because the roller coaster is moving at a fast speed.

2. At point W the roller coaster will have the greatest amount of gravitational energy because it’s at the highest point of the roller coaster.

3. Kinetic energy is present at point Z because the coaster is moving.

SORRY IF I DID IT LATE

D
Question 5
Which elements are in the same group?
Be, Mg, Ca, Sr
AI, SI, P. 5
W, Re, Hs, Mt
B. Si, As, Te

Answers

Answer:

Be, Mg, Ca, Sr are in the same group

Explanation:

these elements are in alkaline earth metals

mark in as a brainly plz

Answer:I think maybe...

Explanation:

W, Re, Hs, Mt

Describe how sedimentary rock forms. Make sure to include compaction and cementation in your answer.

Answers

Answer:

They are compacted, reducing the available pore space and expelling much of the pore-water. Dissolved minerals in the ground water precipitate (crystallize) from water in the pore spaces forming mineral crusts on the sedimentary grains, gradually cementing the sediments, thus forming a rock.

Explanation:

Answer:

Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

Explanation:

A mutation would have an effect on ____
molecules.

sugar
Amino acid
Lipid
Fat

Answers

Answer:

amino acids

Explanation:

Answer:

The correct answer is amino acid.

Explanation:

Have a good day!

Explain how a drought poses a threat to life and the biosphere. Use complete sentences.

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Answer:

A drought poses a threat to the biospere because biospere/life needs water to live, which a drought is a period of time with little or no water. This also poses a threat to the biospere because a drought is very hot and can cause heat exhaustion.

Explanation:

Which is not a form of potential energy?

gravitational

eleastic

chemical

thermal

Answers

The answer is elastic.

Explanation: Energy comes in six basic forms: chemical, electrical, radiant, mechanical, thermal and nuclear. Therefore the answer is elastic because it is not one of the basic forms.

hope this helped!

Eleastic! Energy can come from forms like gravity, chemical, and thermal so eleastic would be the best choice. :)

Please will give brainliest...

Write 5 original weather proverbs and explain why they are true.

Answers

“Red sky at night, sailors delight. Red sky in morning, sailors take warning.”
A reddish sunset means that the air is dusty and dry. Since weather in North American latitudes usually moves from west to east, a red sky at sunset means dry weather—good for sailing—is moving east. Conversely, a reddish sunrise means that dry air from the west has already passed over us on their way easy, clearing the way for a storm to move in.

“Clear Moon, frost soon.”
When the night sky is clear, Earth’s surface cools rapidly—there is no cloud cover to keep the heat in. If the night is clear enough to see the Moon and the temperature drops enough, frost will form. Expect a chilly morning!

“Ring around the moon? Rain real soon.”
A ring around the moon usually indicates an advancing warm front, which means precipitation. Under those conditions, high, thin clouds get lower and thicker as they pass over the moon. Ice crystals are reflected by the moon’s light, causing a halo to appear.

“Rain foretold, long last. Short notice, soon will pass.”
If you find yourself toting an umbrella around for days “just in case,” rain will stick around for several hours when it finally comes. The gray overcast dominating the horizon means a large area is affected. Conversely, if you get caught in a surprise shower, it’s likely to be short-lived.

“The higher the clouds, the finer the weather.”
If you spot wispy, thin clouds up where jet airplanes fly, expect a spell of pleasant weather.

Keep an eye, however, on the smaller puff clouds (cumulus), especially if it’s in the morning or early afternoon. If the rounded tops of these clouds, which have flat bases, grow higher than the one cloud’s width, then there’s a chance of a thunderstorm forming.

Which situation is a result of geotropism?

A stem stem turns turns to to grow grow upward upward against against gravity.

Gravity pulls pulls down down on on all all parts parts of of a a plant.

Leaves are are supported supported on on strong strong stems.stems.

A plant plant falls falls down down when when it it wilts.wilts.

Answers

Answer:

The first one

Explanation:

Because of the growth of the parts of plants in response to the force of. gravity

I need 2 examples of chemical and physical change. *15 points

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*Chemical: Burning of paper and log of wood. - Digestion of food. - Boiling an egg. - Chemical battery usage. - Electroplating a metal. - Baking a cake. - Milk going sour.

*Physical: An ice cube melting into water in your drink. - Freezing water to make ice cubes. - Boiling water evaporating. - Hot shower water turning to steam. - Steam from the shower condensing on a mirror.

Many processes occur in the digestive system. Which process is best classified as a chemical change?
Select one:

Teeth grinding candy

Absorption of water

Enzymes in the saliva break down carbohydrates

Peristalsis in the esophagus
PLEASE HELP!

Answers

Answer:

i think its Enzymes in the saliva break down carbohydrates

Explanation:

Answer:

I believe the answer is Enzymes in the saliva break down carbohydrates

Explanation:

explain how solar radiation and convection currents on Earth. Describe how solar radiation and convection currents work together to form weather patterns and help plants grow.

Answers

Answer:

Convection is the transfer of heat energy in a fluid. ... Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks.

Explanation:

Solar radiation and convection currents work together to form weather patterns and help plants grow.

How do solar radiation and convection currents work together?

Convection currents play an important role in the formation of weather patterns. As warm, moist air rises, it cools and condenses into clouds, which can lead to precipitation such as rain or snow.

Convection currents also play a critical role in plant growth. As warm air rises, it carries moisture with it, creating regions of high humidity in the atmosphere. This moisture can condense into clouds or fall as precipitation, which provides water for plants to grow.

Solar radiation and convection currents work together to create a dynamic and complex system that helps drive many of the processes we see on Earth, from weather patterns to plant growth.

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Which set of coefficients will balance this chemical equation? HELP QUICKLY PLEASE

__C2H4 + __O2 → 2CO2 + 2H2O

A. 1, 2

B. 1, 3

C. 2, 3

D. 2, 5

I will gladly give a BRAINLIEST for a CORRECT, EXPLAINED answer!!

Answers

A. 1, 2

This would make 2 Carbons, 4 Hydrogens, and 4 Oxygens on each side of the equation

To know the number of atoms of an element in any compound or molecule we have to multiply the coefficients that is written in front of the molecule to the number that is written on the foot of that element. So the correct option is option B

What is Balanced equation?

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side

The number of carbon atoms on reactant side is 2 while on the product side it is 2

The number of Hydrogen atom on reactant side is 4 while on the product side it is also 4

The number of oxygen atom on reactant side is 1 while on the product side it is 6, so to balance oxygen we multiply O₂ by 3 so the balanced equation is

C₂H₄+3O₂[tex]\rightarrow[/tex]2CO₂+2H₂O

Thus the balanced equation is C₂H₄+3O₂[tex]\rightarrow[/tex]2CO₂+2H₂O. Option B is correct option

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HELP HELP HELP MEH PLEASE ILL MARK BRAINLIEST
Classify each characteristic as either: Metals, NonMetals

Answers

Answer:

High luster- shiny: metals

Low luster- dull: non-metals

Is Ductile- can be pulled into thin wires: metals

Not ductile: non-metals

Not malleable- is brittle: non-metals

Is malleable- elements can be hammered into thin sheets: metals

Poor conductors of heat and electricity: non-metals

Good conductors of heat and electricity: metals

Located on the left side of the periodic table: metals

Located on the right side of the periodic table: non-metals

sorry if i got something wrong but i think this is all right

hope this helps :)

Answer:

High luster shiny is the characteristic of metals while low luster and dull is a non metal.

Metals are ductile because wires are made up of metals which is due to their ductility. non metals are not ductile.

Non metals are non melliable while metals are melliable

Non metals are poor conductor while metals are good conductor of heat and electricity.

Metals are located on the left side while non metals are located on right side of periodic table.

Explanation:

HELPPPPPPPPPPPPPPPPPP

Identify factors that influence the strength of gravity between two objects.

Answers

Answer:

distance between them , and mass of the objects

Explanation:

the further away a object is the weaker the gyrational pull is, and imagine lifting a anvil above your head, the anvil weight push's down upon you pulling.

The mass and the distance :)

Your friend claims that weather predictions are just guesses. What would you say to change your friend's mind? Include at least two pieces of evidence that weather predictions are scientific. Use complete sentences.

Answers

If my friend was to say that I would say that the prediction are scientifically drawn. They look at the current state of the atmosphere. They also make educated guesses regarding previous weather patterns in that given area.

Hermit crabs and anemones have a mutualistic relationship. Which of these statements best describes how they interact?

Hermit crabs and anemones live in the same ecosystem and can eat similar organisms

Anemones can move on their own by using their tentacles and pedal disk. The pedal disk is on the side of the anemone that is opposite its mouth.

Anemones cannot move very quickly, but they can sting predators. When an anemone is riding on a hermit crab's shell, the anemone protects the crab from predators.

When a hermit crab grows too big for a shell, it moves to a larger shell. If an anemone has attached itself to the old shell, the hermit crab will move the anemone to its new shell.

Answers

Answer: anemones cannot move very quickly, but they can sting predators. When an anemone is riding on a hermit crab's shell, the anemone protects the crab from predators.

Explanation:

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Where would information relating to drug dosages for old patients be found? X^2 - 36 = 0. Factor using the difference squares. Then solve the equation using the Zero Product Peoperty. Write your answer in set notation. This introduces an applicant and the applicants rsum to a potential employer: a. Personal Goal Statement b. Cover Letter c. Job Application d. Reference Please select the best answer from the choices provided A B C D bina ayat perkataan jikalau Drag each label to the correct location on the image.Identify the parts of the male reproductive system on the diagram.epididymistestisurethravas deferensprostate glandseminal vesicle The reallocation of seats in the US House of Representatives to each state after each census.A. BicameralismB. ClotureC. ReapportionmentD. GerrymanderingE. Redistricting Help please not a test just reviewThere will be more if you want more brainleitBy more I mean questions Chemists use the periodic table to organize the elements. 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What percent off is the saleadvertising? Regular Price(dollars)25Sale Price(dollars)18.75 Question 7 of 10 HELP ASAP Which statement explains how Thomas Hobbes's view of human nature influenced the way monarchs ruled? A. Because rulers' authority was derived from the natural state of humanity, rulers sought their subjects' consent when passing laws. B. Because human nature was selfish, rulers used their absolute power to prevent social chaos from developing. C. Because kings must have absolute power, subjects were not allowed to speak out against a ruler or the government. D. Because kings had a divine right to rule, subjects were forced to obey rulers' commands without question. : THE NEXT BIG THING In this lesson, you learned about two revolutionary new ideas that have engineers hard at work. There are many other ideas like these out there that will change the future. For this lesson, you will choose one of these new designs, research the science behind it, and learn about the engineering challenges that the idea presents. To complete this project you must: Find an engineering idea that you would like to learn more about. It must be something that is still in the design or prototype phase of development; it cant be something that is commercially available. If you are having trouble finding an idea, try an online search for future engineering ideas or future of engineering. Find at least three references on your chosen innovation. These references may be online sources or journal articles. After you have researched the innovation, write a 250-word summary of what the idea is and why it will benefit society. Write a 250-word description of the science behind the innovation. You may use pictures, equations, or charts if they enhance your description. Write a 250-word description of the challenges facing the engineers who are working on the innovation. Submission Guidelines Submit your assignment as one 750-word essay. List all of the references that you used at the end of the essay. Remember to use correct spelling and grammar. Submission Requirements Use standard English and write full phrases or sentences. Do not use texting abbreviations or other shortcuts. Make the information easy to understand.