Chemical Changes Review

Ms. Capets was modeling a chemical and physical change during an investigation in science class. Which of the following will result in a substance with new chemical characteristics?

• cutting wood

• breaking a mirror

• shredding a newspaper

• adding vinegar to baking soda

Tags

NGSS.MS-PS1-2

Andy is investigating changes in materials. Which of the following describes an example of a material undergoing a chemical change to become a completely new material with different characteristics?

• ice cubes melt into liquid at high temperatures

• Iron turns to rust when it is exposed to oxygen

• Boiling water turns into water vapor, which is a gas

• Water vapor become liquid at a very low temperature

Tags

NGSS.MS-PS1-2

During the fall, a large pile of dry leaves collected in the school's yard. The following spring, the same pile of leaves is smaller, broken down, wet, and stuck together.

Which change BEST explains what happened to the leaves?

• The leaves were decaying.

• The leaves were burning.

• The leaves were melting.

• The leaves were rusting.

Tags

NGSS.MS-LS2-3

Simon started a fire in the fireplace using logs and matches. The next morning he woke up and there were only ashes left in the fireplace. Which of the following BEST explains the change that occurred when the logs were burned?

• The heat from the fire caused a chemical change burning the logs into ash.

• The heat from the fire caused a physical change burning the logs into ash.

• Decaying caused a chemical change that resulted in ash.

• Decaying caused a physical change that resulted in ash.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mariah is making eggs for breakfast. Which of the following BEST explains a chemical change that occurred to the eggs that resulted in a new material?

• She cracked the eggs.

• She cooked the eggs.

• She flipped the eggs.

• She stirred the eggs.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4

Hannah received a new bike made of iron. She mistakenly left her bike outside in the rain for several days.

What change most likely happened to her bike?

• The seat on the bike fell off.

• The tires on the bike went flat.

• The iron on the bike started to rust.

• The pedals on the bike broke into pieces.

Tags

NGSS.MS-PS1-5

Mrs. Ramirez is performing different investigations involving burning, freezing, melting, and mixing materials. One of the investigations created a new material with different characteristics that could not be changed back to any of the original materials.

Which investigation caused a change that could NOT be undone?

• mixing colored marbles

• melting ice cream

• burning paper

• freezing water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Tommy is watching science videos on chemical changes. Which of the following examples does NOT result in a change material?

• iron rusting

• burning wood

• water freezing

• baking cupcakes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Jose and his family went camping. Jose's father burned wood to roast marshmallows. Which of the following BEST explains the change that occurred when the wood was burned?

• a physical change with new materials formed

• a chemical change with new matherials formed

• a physical change with no new materials formed

• a chemical change with no new material formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The matter around us is always changing in different ways. Which situation describes a change that results in a new kind of matter with different characteristics?

• a banana on a plate turns brown

• a puddle on a sidewalk freezes in to ice

• a student molds clay into different shapes

• a cook chops up vegetables into tiny pieces

Tags

NGSS.MS-PS1-2