What sort of evidence would support at least one of the components of the

Chemistry

1 answer:

Yuki888 [10]3 years ago

8 0

Answer:

(not sure) The origin of all cells observed can be traced to previous cells

Explanation:

- not all cells convert energy (?) (this I'm not sure but think so? might be wrong tho)

- not all cells have cell walls e.g. animal cells only have the cell membrane, no cell wall

- Rocks and other nonliving things are composed of cells: non living things are composed of the elements and not cells (unless they were previously alive, then they contain dead cells)

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What physical change happens to atoms and molecules in a solution that is strongly heated in a flame? Is there a phase change? I

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When atoms and molecules speed up or slow down, that is a physical change. When they change state from liquid to solid or from gas to liquid, that is a physical change. ... The ions or molecules can still come back together to form the original substance

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2 years ago

Sound travels faster in high temperatures.:<br> True<br> False

fredd [130]

Answer:

False

Explanation: sound travels fastest through solids slowest through liquids.

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3 years ago

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Ray Of Light [21]

theAnswer:A

Explanation:

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Stone tools enabled people to hunt and grow crops made the food supply more

Nastasia [14]

It makes it more accessible to everybody

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3 years ago

Deﬁne atomic numberand mass number. Which can vary without changing the identity of the element?

Volgvan

Explanation:

Atomic number is defined as the number of an element which represents total number of protons.

When an atom is neutral then it means it contains same number of protons and electrons.

On the other hand, atomic mass is defined as the sum of total number of protons and neutrons present in an atom.

Protons of every element remains fixed because it shows the identity of each element but if we change the number of neutrons then also identity of the atom will remain fixed. This is because changing the number of neutrons will not show any change in number of protons.

For example, $^{2}_{1}H$ and $^{3}_{1}H$ are isotopes of hydrogen and they have same number of protons but different number of neutrons.

Thus, we can conclude that number of neutrons can vary without changing the identity of the element.

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3 years ago