Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. A physical change doesn’t break the bonds between atoms of a substance or form new ones. Compounds can be broken down by a chemical change. A chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. What simple substance would a compound break into? The basic elements that make it up! For example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. Which of the following is an example of a chemical change?

A
separating water into different glasses

B
breaking frozen ice cubes with a hammer

C
running an electric current through water

D
boiling water to evaporate it on a stove

Answers

Answer 1

Answer:

c

Explanation:

covalent bond and hydrogen bond

Answer 2

Answer:

C because

Explanation:

covalent bond and hydrogen bond Are both present Here so that will be your answer


Related Questions

a travel agency wants people to go on a tour of a mountain region with many glaciers. write a paragraph for a travel brochure describing what people will see on the tour. in your answer, include features formed by glacial erosion and deposition
God bless, stay safe, and happy holidays! :)

Answers

Answer:

Cheap paper writing service provides high-quality essays for affordable prices. It might seem impossible to you that all custom-written essays, research papers, speeches, book reviews, and other custom task completed by our writers are both of high quality and cheap.

Explanation: hope that helps

help please fill in the blank
The mass of an object is 45 kilograms. Its weight on Earth is(blank)newtons, and its weight on the Moon is (blank) newtons

Gravitational force is 9.8 m/s2 on Earth and 1.6 m/s2 on the Moon.

Answers

Answer:

441N and 72N

Explanation:

W=mg

W=45×9.8=441N

Its weight on earth is 441N

W=mg

W=45×1.6=72N

Its weight on the moon is 72N

Answer:

441 Newtons and 72 newtons

Explanation:

Why? Answer down below!

Fill in the Blank:

Word Bank:
Decreases, Increases, Daughter, Replicates, Surface Area, Translates

As a body cell grows, the ratio of _______ to volume _________. Before it grows to large, a cell will divide into two ________ cells. So that each new cell receives its own genetic instructions, the cell ________ or copies, all of its DNA.

Answers

Answer: As a body cell grows, the ratio of SURFACE AREA to volume INCREASES. Before it grows to large, a cell will divide into two DAUGHTER cells. So that each new cell receives its own genetic instructions, the cell REPLICATES or copies, all of its DNA.

Explanation:

As a body cell grows, the ratio of surface area to volume decreases. Before it grows to large, a cell will divide into two daughter cells. So that each new cell receives its own genetic instructions, the cell replicates or copies, all of its DNA.

The volume of a growing cell increases at a larger pace than the surface area. Hence the ratio of the surface area to the volume of the cell keeps decreasing. At a certain point, the signal to divide is given and this leads to the division of the cell into two daughter cells.

Just before the division, the genetic material of the cell is replicated and other important biomolecules are synthesized before the final call can be made.

More on the cell cycle can be found here: https://brainly.com/question/25282664?referrer=searchResults

The bending of plants toward the light sources serves which purpose in terms of plant’s metabolism?

Answers

Answer:

B

Explanation:

TOOMK THE  Q8IX

The correct answer is B

Summarize Darwin's theory of natural selection using the Galapagos tortoises or finches as an example.

Answers

Answer:

However, the Galapagos finches helped Darwin solidify his idea of natural selection. The favorable adaptations of Darwin's Finches' beaks were selected for over generations until they all branched out to make new species. These birds, although nearly identical in all other ways to mainland finches, had different beaks.

Explanation:

Darwin's theory states that advantageous traits increase survival and reproduction. Galapagos tortoises and finches have adapted to their environments.

What is Darwin's theory of natural selection?

Darwin's theory of natural selection is a fundamental principle in evolutionary biology. It states that the traits that provide an advantage to individuals within a population increase the likelihood of survival and reproduction. The process involves four key components: variation, heredity, selection, and time.

Within a population, there is genetic variation, meaning that individuals have different traits. Some traits may be advantageous, such as a thicker coat to survive colder temperatures or a longer beak to access food. Individuals with advantageous traits are more likely to survive and reproduce, passing their traits onto their offspring.

Over time, the frequency of advantageous traits increases within the population, leading to evolution. Natural selection is the mechanism that drives this process, allowing species to adapt and thrive in their environments.

Learn more about Darwin's theory, here:

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Please help, this is to difficult for my last two brain cells to configure ;-;

Answers

Answer:

ok

Explanation:

So is this fill in the blank? Please comment back with the subject this is in so I can try and help but I’m confused myself.

A scientist observes two stars in the night sky through a telescope. Star A is white in color and relatively dim. The star’s estimated temperature is very high.

Star B is red in color and extremely bright. The star’s temperature is low compared with other stars.

Help the scientist classify the two stars.

Answers

Answer:

Star A is a Neutron Star while Star B is a Red Giant

Explanation: Neutron star is a very hot star, very small in size and hence dim and is white in color. A neutron star results after a massive star goes supernova. It is primarily composed of neutrons packed in a small boundary.

 star B would be a red giant. This is because, a red giant star is red in color, is very big in size, and has a low temperature. A red giant star is a towards the end stage of a small to an average mass star.

I think

Star A is an white dwarf star

Researchers have been studying how emissions from both volcanoes and human activities, such as the burning of fossil fuels, impact the atmosphere. Both types of emissions contribute to the total CO2 levels in the atmosphere. Graph 2 shows that atmospheric CO2 levels have been steadily increasing over time. This increase in CO2 levels has been linked to the increase in global surface temperatures.

Explain why the total mass of carbon must be decreasing in a different step of the slow carbon cycle based on the on the increase in atmospheric CO2.

Answers

Answer:

just look at the graph it literally tells you the answer

Please Help!!!! Thank You! 15 points!

Answers

Okay what am I answering for you

Answer:

okay what is the question

HELP URGENT!! My bunny just had babies they are not moving what should I do??????

Answers

CHECK IF THWY ARE BREATHING
the little rabbits are visibly injured (bleeding or nonfunctioning limbs, for example) or obviously suffering, it's best not to touch or move them

Do you think that humans and humpback whales share a common evolutionary lineage?

Answers

Answer:

Yes!

Explanation:

Yes because when it comes to whales and humans we have a lot in common. They have different behaviors and languages within their own culture as humans do.They come in a lot of sizes and have different behaviors. Just like us and they are also mammals. While other sea creatures have gills.

Answer:

Scientists have used computer analysis to read evolution backward and reconstruct a large part of the genome of an 80-million-year-old mammal. This tiny shrewlike creature was the common ancestor of humans and other living mammals as diverse as horses, bats, tigers and whales.

Explanation:

In your own words, describe why an astronaut's weight is different on the moon than it is on Earth.

Answers

Our weight on moon is less than it would be on Earth due to a difference of the strength of gravity on the moon. The moon's gravitation force is determined by the mass and the size of the moon. ... This means that if you went to the moon you would weigh less, even though your mass stays the same

An astronaut's weight is different on the moon than on the earth because of the weak force of gravitation on the moon.

What is weight?

Weight is the gravitational pull of a second, much larger object, like the Earth or Moon, on a first object. The universal law of gravity states that any two things will attract each other due to their masses with a force directly related to the product of their masses and inversely related to the square of the distance between them. This law is the cause of weight.

As a result, larger objects naturally weigh more when placed in the same spot; yet, the weight of an object decreases the further it is from the Earth. Due to the Earth's polar radius being a tiny bit smaller than its equatorial radius, an object's weight at the South Pole is somewhat higher than its weight at the Equator.

Even if an object's mass is constant, its weight changes depending on where it is. The identical thing weighs one-sixth as much on the surface of the Moon as it does on Earth because of the Moon's lesser mass and radius as compared to the Earth.

Therefore, the weight of the astronaut on the moon will be less than their weight on the earth.

Read more about the weight, here

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Can someone plz answer the two questions below plz and thank you!!!

Answers

Answer:

What questions

Explanation:

It isn’t any questions here?

HELP ME PLZ- I HATE SKOOL >:((

Answers

l hate school toooooooo:(
Beach mice:
Since the beach mice live in the beach (obviously) that is their ecosystem. This means that there are predators that eat the mice on the beach.

Let us assume that the mice in the beach have been isolated from the other deer mice and therefore could not reproduce with them

It comes down to survival of the fittest. The mice with the lightest fur survived because they blended in with their environment and avoided predators, so they reproduced and created more “light coat” offspring. Each generation the mice with the light coats were able to escape predation and reproduce. Therefore it is reasonable that the two mice have different genes that code for their fur colour.

The forest mice need a darker fur to blend in with their environment to avoid predation, so they’re fur stayed darker over the generations for the same reasons listed above ( vice versa of course )

Are there any more endangered animals who are experiencing a bottleneck effect. I read an article and I had this question in mind.

Answers

Answer:

I think Mountain Gorrillas?

I could be wrong, I saw it on a website

:D

what is this planet
Distance from Sun- 0.72 AU 9.54 AU
Planet composition- rocky mantle, iron core hydrogen, helium
Gases in atmosphere-very dense atmosphere that is 96.5% poisonous carbon dioxide and 3.5% nitrogen mostly hydrogen and helium
Number of moons -0 62
Rings- no rings

Answers

Answer:

The answer is Venus,

That planet is most definitely Venus

Which process is responsible for producing eggs and sperm?


meiosis


sexual reproduction


asexual reproduction


mitosis

Answers

Answer:

meiosis

Explanation:

Which of these factors is involved in earthquake formation?

Answers

Answer:

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. They don't just slide smoothly; the rocks catch on each other.

Explanation:

a earthquake is formed when, two titanic plates rub together and then get caught on each other which creates a earthquake

Study the table about Earth’s interior.

A 4 column table with 5 rows. First column is unlabeled with entries: Crust, uppercase mantle, Lower mantle, Outer core, Inner core. Second column is labeled Thickness in kilometers with entries: 30, 720, 2,171, 2,259, 1,221. Third column is labeled Density in grams per centimeters cubed, divided into Top and Bottom columns. Top entries are: 2.2, 3.4, 4.4, 9.9, 12.8. Bottom entries are 2.9, 4.4, 5.6, 12.2, 13.1. Fourth column is labeled Types of Rock Found with entries: Silicic rocks, Peridotite, Magnesium and silicon oxides, Iron plus oxygen, Iron plus oxygen.

Which conclusion is supported by information in the table?

The mantle is thinner than the crust.
The core is the thickest of Earth’s layers.
The inner core is thicker than the outer core.
The mantle is the thinnest of Earth’s layers.

Answers

Answer:

a) No

b) Yes

c) No

d) No

I hope this helps you

Answer:

B

Explanation:

PLZ HELP! ILL GIVE BRAINLIEST I REALLY NEED HELP
plz....

Answers

Strengths: it can convert H2O, CO2, and light energy in glucose and oxygen, which is essential for plants

The oxygen production is vital as well

Weaknesses: if there is no sunlight available, the process will not occur, or it can be extremely difficult

Overall, the process takes a long time with many other intra-processes that occur concurrently with photosynthesis

I hope this helps!

The temperature of the water in Glass A is 90°C. The temperature of the water in Glass B is 30°C. When each is poured into a container of water which is 60°C, which of the following statements is most likely to occur?

A. Water from Glass A will sink to the bottom while water from Glass B will sink.
B. Water from Glass A will rise to the top while water from Glass B will sink.
C. Water from Glass A will sink to the bottom while water from Glass B will rise.
D. Water from Glass B will rise to the top while water from Glass A will rise.

Answers

b because heat rises

What is the molecule that is responsible? for albinism and colorblindness

Answers

The answer is melanin.

Mark me brainliest!

Answer:

melanin i believe

Explanation:

Heey may someone plz help me with these two questions thx!!!

Answers

Answer:

4 is d and 5 is a

Explanation:

7th grade science need help

Answers

Answer:

The answer is B

Explanation:

the answer i believe is probably B

The main difference between ocean water and lake water is that ocean water contains - *

A. oxygen
B. salt
C. sediment
D. plants

Answers

Im pretty sure its salt ;-;
B salt cause ocean water is salt and lake water is fresh

Which of the following provides evidence that supports the continental drift theory?

Fossils of the same organisms found in different continents
Magnetized rocks that do not match with the poles
Seafloor spreading
Volcanic activity

Answers

Answer:

The First Answer with the fossils.

Explanation:

It explains why an animals fossils were found in 2 places that are no where near eachother. So it had to have been the same continent at somepoint.

Answer:

Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.

Explanation:

Hope it's answer you plz mark as Brainlist

30 POINTS!! PLEASE HELP ME ❤️❤️❤️❤️

Answers

Answer:

The king tide, also called a perigean spring tide, is caused by the sun and the moon aligning at just the right time such that the moon is closest to the Earth and the Earth is closest to the sun.

Explanation:

_________ are the four largest satellites that orbit Jupiter

Answers

Answer:

 Io, Europa, Ganymede and Callisto. 

You are looking out over the ocean and see this:

What can you know about the tide?

Answers

When we are looking out over the ocean and see this: We can know about the tide that it must be neap tides. Thus, the correct option is A.

What are neap tides?

A neap tide occurs seven days after a spring tide. It refers to a period of moderate tides when the sun and the moon are at right angles to each other in space. A spring tide is a common historical term which has nothing to do with that of the season of spring.

A tide just after the first or third quarters of the Moon when there is least difference between the high and low tides is called as Neap tide. During this time, the Moon and the Sun are at right angles to that of the earth. As a result of this, the high tides are not too high, and the low tides are not too low.

Therefore, the correct option is A.

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How is the process of fertilization in animals like the process that takes place in plants?


Spores can become sperm that will fertilize the egg.


Self-fertilization is possible if no partner is available.


A sperm cell and an egg cell combine to form an embryo.


Sperm is encased in a grain of pollen to travel to an egg.

Answers

Answer:

Hope it helps :))

Explanation:

And i also hope you get it right ;))

The answer is C! A sperm cell an egg cell combine to form a embryo!
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