Question 1

Students create a table that lists processes observed in nature.

Which process describes only a physical change?

Accepted Answer

Process 4

Answer

Process 1

Answer

Process 2

Answer

Process 3

Question 2

A student places an ice cube on a plate. After 10 minutes, the ice cube melts into liquid water. Which statement best explains this change?

Accepted Answer

It is a physical change because the water is still $H₂O$ .

Answer

It is a chemical change because new substances are formed.

Answer

It is a chemical change because energy is absorbed.

Answer

It is a physical change because it produces a gas.

Question 3

A student tears a sheet of paper into small pieces. Which statement best describes this change?

Accepted Answer

It is a physical change because the paper’s identity remains the same.

Answer

It is a chemical change because the paper cannot be put back together.

Answer

It is a chemical change because energy is used to rip the paper.

Answer

It is a physical change because the paper changes into a new material.

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