Physical and Chemical Changes MC

When water changes from a liquid to a gas and then the steam condenses back to the

liquid form, these types of changes are

• physical

• chemical

• electrical

• mechanical

Tags

NGSS.MS-PS1-4

What happens to sugar when it is combined with water?

• it separates

• it dissolves

• it floats to the top

• it becomes warm

Tags

NGSS.MS-PS1-2

Which describes only a physical change?

• baking a cake

• frying an egg

• burning a piece of toast

• squeezing the juice from fruit

Some power plants produce energy by burning coal. In these power plants, the heat from

burning coal is used to boil water. Which statement BEST describes the changes that

occur when burning coal and boiling water?

• Burning coal and boiling water are both physical changes

• Burning coal and boiling water are both chemical changes

• Burning coal is a chemical change, and boiling water is a physical change

• Burning coal is a physical change, and boiling water is a chemical change

Tags

NGSS.MS-PS1-2

Which of these is a physical change that takes place in a garden?

• Insects eat the leaves of a plant for food

• Flowers grow after a summer rain shower

• Earthworms loosen soil as they travel through it

• Leaves convert sunlight to sugar by photosynthesis

Which of these could be a physical change?

• Wood is burned in a fireplace

• Cake batter is baked in an oven

• A blue liquid and a yellow liquid mix and make a green liquid

• Baking soda is mixed with vinegar to make carbon dioxide gas

When frozen carbon dioxide (C02) is heated, it changes directly into a gas. Which

statement BEST indicates that a physical change has taken place?

• Heat caused an increase in gas production

• Heat caused a new substance to form

• Heat caused a decrease in energy

• Heat caused a change in state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which task in the kitchen is an example of a physical change?

• frying an egg

• baking a cake

• melting butter

• toasting bread

A student kept a notebook during an investigation. Which recorded observation was

MOST likely a physical change?

• The solution was heated for two minutes until it boiled

• A solid formed when two liquids were mixed together

• Two solutions were mixed and the resulting solution felt hot

• The color of two mixed solutions changed from clear to white

Melting, boiling, and freezing are examples of

• physical changes

• chemical changes

• magnetic changes

• electrical changes

Tags

NGSS.MS-PS1-4