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SashulF [63]
3 years ago
8

plz help Explain the difference between a Physical Change and Chemical Change and give three examples of each

Biology
1 answer:
Law Incorporation [45]3 years ago
4 0

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

Explanation:

Physical change examples:

An ice cube melting into water in your drink.

Freezing water to make ice cubes.

Boiling water evaporating.

Chemical change examples:

Burning wood.

Souring milk.

Mixing acid and base.

hope this helps

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Answer:

Day time period have we as humans been here: 26 seconds

Explanation:

4,500,000,000 years = 1 day

1,400,000 years = X

X = 0.0003111  

1 day = 86,400 seconds

0.0003111 = X

X = 26 seconds

In term of the Earth in 24-hour clock, <em>Homo sapiens</em> appeared on our planet only in the last 26 seconds, it means that in geologic time, humans have existed for only a brief time period and thereby it is a relatively new species.

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Which is the third stage of cellular respiration
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Your welcome<3

Got it from www.nature.com

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