Question 1

Which of the following is an example of a chemical change?

Accepted Answer

Rust forming on a bicycle

Answer

Dissolving salt in water

Answer

Chopping wood

Answer

Melting ice

Question 2

What type of change occurs when water boils and turns into steam?

Accepted Answer

Physical change

Answer

Nuclear change

Answer

Biological change

Answer

Chemical change

Question 3

What happens when baking soda and vinegar are mixed?

Accepted Answer

A chemical change occurs

Answer

It freezes

Answer

It dissolves

Answer

It evaporates

Question 4

Which of the following is NOT a sign of a chemical change?

Accepted Answer

Change in size or shape

Answer

Change in color

Answer

Formation of a precipitate

Answer

Production of gas

Question 5

Which of the following is an example of a physical change?

Accepted Answer

Crushing a can

Answer

Rusting metal

Answer

Digestion of food

Answer

Burning wood

Question 6

What occurs during a chemical change that does not occur during a physical change?

Accepted Answer

Formation of new substances

Answer

Change in state

Answer

Change in color

Answer

Change in temperature

Question 7

Which process involves a change in the state of matter?

Accepted Answer

Melting ice

Answer

Rusting iron

Answer

Burning paper

Answer

Baking bread

Question 8

Which of the following describes a chemical change?

Accepted Answer

Making a cake

Answer

Freezing water

Answer

Cutting fruit

Answer

Mixing salt and water

Question 9

Which of the following describes a physical change?

Accepted Answer

Dissolving sugar in water

Answer

Baking a cake

Answer

Cooking an egg

Answer

Burning wood

Question 10

What is a sign that a chemical change has occurred?

Accepted Answer

A change in temperature without heating or cooling

Answer

Melting ice

Answer

Dissolving a solid

Answer

A change in shape

Question 11

Which of the following is an example of a chemical change?

Accepted Answer

Rust forming on a metal surface

Answer

Dissolving sugar in water

Answer

Chopping wood

Answer

Melting ice

Question 12

What is an example of a physical change?

Accepted Answer

Boiling water

Answer

Digesting food

Answer

Burning paper

Answer

Baking a cake

Question 13

What happens during a chemical change?

Accepted Answer

New substances are formed

Answer

The size decreases

Answer

The color remains the same

Answer

The shape changes

Question 14

Which of the following best describes a sign of a chemical change?

Accepted Answer

Color change in a substance

Answer

Slicing a banana

Answer

Water freezing

Answer

Mixing oil and water

Question 15

Which of the following is NOT a sign of a chemical change?

Accepted Answer

State change without new substances

Answer

Production of gas

Answer

Formation of a precipitate

Answer

Color change

Question 16

What is an example of a chemical change that occurs in food?

Accepted Answer

Baking bread

Answer

Freezing ice cream

Answer

Mixing salad

Answer

Chopping vegetables

Question 17

Which process is an example of a physical change?

Accepted Answer

Crushing a can

Answer

Burning wood

Answer

Cooking an egg

Answer

Rusting metal

Question 18

Which of the following is a result of a chemical change?

Accepted Answer

Formation of bubbles when vinegar and baking soda mix

Answer

Melting chocolate

Answer

Dissolving salt in water

Answer

Cutting paper

Question 19

Which of the following demonstrates a chemical change when a candle is burned?

Accepted Answer

The wax turns into smoke and carbon dioxide

Answer

The candle melts

Answer

The flame produces light

Answer

The wick gets shorter

Question 20

What happens when ice melts?

Accepted Answer

It turns from solid to liquid without changing its chemical composition

Answer

It forms new substances

Answer

It becomes a gas

Answer

It changes into hydrogen and oxygen

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