# 5th Grade Science : Physical Science

## Example Questions

### Example Question #1 : Physical Science

Select the answer that is a physical change.

A nail rusting

Ice melting

Wood burning

Baking a cake

Ice melting

Explanation:

A physical change is a change is a substance that does not change what the substance is. In contrast, in chemical change a new substance is formed.

Let's look at our options:

When wood is burned, the wood turns into ash. We can't get the piece of wood back once it's been burned; thus, wood burning is a chemical change.

When a cake is baked, the ingredients combine and turn into a cake once it's baked. Once we have a cake, we can't get the ingredients back; thus, baking a cake is a chemical change.

When a nail rusts, pieces of the metal nail have turned into rust. We can't get the original nail back; thus, a nail rusting is a chemical change.

Ice is made up of water, and when the ice melts we are left with a puddle of water. If we freeze the water, it will turn back into ice; thus, melting ice is a physical change.

### Example Question #2 : Physical Science

Select the answer that is a physical change.

Wood burning

Cutting a piece of wood

Baking a cake

A nail rusting

Cutting a piece of wood

Explanation:

A physical change is a change is a substance that does not change what the substance is. In contrast, in chemical change a new substance is formed.

Let's look at our options:

When wood is burned, the wood turns into ash. We can't get the piece of wood back once it's been burned; thus, wood burning is a chemical change.

When a cake is baked, the ingredients combine and turn into a cake once it's baked. Once we have a cake, we can't get the ingredients back; thus, baking a cake is a chemical change.

When a nail rusts, pieces of the metal nail have turned into rust. We can't get the original nail back; thus, a nail rusting is a chemical change.

Cutting a piece of wood does not change the wood, it's still a piece of wood, just smaller; thus, cutting a piece of wood is a physical change.

### Example Question #3 : Physical Science

Select the answer that is a chemical change.

Cutting a piece of wood

Ice melting

Wood burning

Butter melting

Wood burning

Explanation:

A physical change is a change is a substance that does not change what the substance is. In contrast, in chemical change a new substance is formed.

Let's look at our options:

Ice is made up of water, and when the ice melts we are left with a puddle of water. If we freeze the water, it will turn back into ice; thus, melting ice is a physical change.

Cutting a piece of wood does not change the wood, it's still a piece of wood, just smaller; thus, cutting a piece of wood is a physical change.

Butter melting is similar to ice melting. When butter melts, it can be frozen back to butter; thus, butter melting is a physical change.

When wood is burned, the wood turns into ash. We can't get the piece of wood back once it's been burned; thus, wood burning is a chemical change.