PHYSICS MIDDLE SCHOOL

Two substances were mixed and there was a color change and small flames. What can you infer happened?A physical property was observed
A chemical change occurred
A change in state from solid to liquid
Matter was destroyed

Answers

Answer 1
Answer:

A chemical change occurred

Explanation:

There are two types of changes, physical changes and chemical changes:

  • A chemical change occurs when the nature of a substance changes, and new substances are formed. This occurs when the bonds between molecules in the reactants break, and they re-form into new substance. A change in the colors of the substance involved is, for example, a sign that a chemical change occurred
  • A physical change occurs when there is a change in state of a substance, but no new substances are formed. For instance, a physical change is the melting of ice, or the boiling of water, or the condensation of water..

In this problem, two substances are mixed and there is a color change and small flames. The color change indicates the formation of new substances, so a chemical change has occurred. Moreover, the presence of small flames indicates that a chemical reaction has occurred (burning of oxygen), so a new substance has formed, so this is another indication of a chemical change.

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Answer 2
Answer:

Answer:

The answer is B. A chemical change occurred

Explanation:

I took the test and got the answer right

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Answers

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Answers

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What form of energy provides power for a gas stove? A.
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B.
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C.
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D.
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Answers

The correct answer to the question is : C). Chemical energy.

EXPLANATION:

A gas stove provides energy when the gas present inside it, is burnt.

The gas contained inside it are natural gases which contain chemical energy. When gases come under fire or electric spark, the chemical energy is converted into light and heat energy.

No nuclear, electric or sound energy are consumed in providing power .

Hence, the correct statement is chemical energy.
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Answers

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Ways to decrease friction 

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Metamorphic
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Sedimentary

Answers

Igneous rocks form when melted

Igneous rocks (1st option) are formed when the rocks melt, cool & then harden. Their formation takes place over a long period of time.

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RainbowSalt2222 ☔

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Answers

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