Changes to Matter Review

Jamal mixes vinegar and baking soda. He notices bubbles forming and the mixture starts to fizz. What does MOST LIKELY mean?

• The substances are the same.

• A new substance has formed.

• The vinegar disappeared.

• The baking soda cooled down.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a mixture where a new substance is NOT formed?

• Mixing flour and water

• Baking a cake in the oven

• Mixing vinegar and baking soda

• Burning a piece of paper

Tags

NGSS.MS-PS1-2

Which clue would BEST help you know that a new substance has formed?

• The color stays the same

• The mixture cools down

• There is a change in temperature, bubbles form, or a new smell appears

• The mixture is stirred

Tags

NGSS.MS-PS1-2

After mixing two clear liquids, a solid forms at the bottom of the container. What does this MOST LIKELY mean?

• One liquid was heavier than the other.

• A new substance was formed.

• The container was cold.

• The liquids were just water.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When salt is mixed with water, it disappears. What BEST describes what happened?

• A new substance formed.

• The salt evaporated.

• The salt dissolved but no new substance formed.

• The water turned into salt.

Tags

NGSS.MS-PS1-2

Which of these is NOT a sign that a chemical change (new substance) has happened?

• Change in color

• Bubbles or fizzing

• Change in temperature

• Stirring the mixture

Tags

NGSS.MS-PS1-2

You mix two substances and the container becomes very cold. What does this tell you?

• It's a physical change.

• A new substance has formed and absorbed heat.

• The container was wet.

• Nothing changed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Mixing sand and iron filings results in:

• A new substance

• A chemical change

• A physical mixture

• A melted product

What happens when you mix lemon juice and baking soda?

• Nothing

• A new substance is made and gas is released

• It turns into lemon water

• It becomes colder only

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which process involves forming a new substance?

• Freezing water

• Melting butter

• Burning wood

• Chopping vegetables

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5