Chemical & Physical Changes

As a treat, Mrs. Lemaster made a campfire for the teachers by burning wood so they could cook hot dogs & roast marshmallows. Which of the following best explains the change that occurred when the wood was burned?

• A. a chemical change with no new material

  formed

• B. a chemical change with new materials formed

• C. a physical change with no new materials

  formed

• D. a physical change with new materials formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mrs. Hill is making eggs for her family’s breakfast. Which of the following best explains a chemical change that occurred to the eggs that resulted in a new material?

• A. She cracked the eggs.

• B. She flipped the eggs.

• C. She stirred the eggs.

• D. She cooked the eggs.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Mr. Gerschick completed several investigations involving burning, freezing, melting, and mixing materials with his class. Some of the investigations created a new material with different characteristics that could not be changed back to any of the original materials. Which investigations caused a change that could NOT be undone? Select ALL that apply.

• A. mixing chocolate chips into yogurt

• B. melting frozen yogurt

• C. burning paper

• D. freezing apple juice

• E. mixing brownie batter & baking it

Tags

NGSS.MS-PS1-2

Mrs. Turner was modeling chemical and physical changes during an investigation with her 4th grade class. Which of the following will result in a substance with new chemical characteristics? Select ALL that apply.

• A. cutting wood

• B. roasting a marshmallow

• C. adding vinegar to baking soda

• D. shredding a newspaper

• E. lighting a match

Tags

NGSS.MS-PS1-2

Coach Snell took the cub scouts on a camping trip, and he started a campfire in a fire pit using logs and matches. The next morning he woke up and there were only ashes left in the fire pit. Which of the following best explains the change that occurred when the logs were burned?

• A. Decaying caused a chemical change that resulted in ash.

• B. Decaying caused a physical change that resulted in ash.

• C. The heat from the fire caused a chemical change

  burning the logs into ash.

• D. The heat from the fire caused a physical change

  burning the logs into ash.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4

Ms. Roberts received a new bike made partially of iron. She accidentally left her bike outside where it got rained on for several days. What change most likely happened to her bike?

• A. The iron on the bike started to rust.

• B. The tires on the bike went flat.

• C. The seat on the bike fell off.

• D. The pedals on the bike broke into pieces.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

During the fall, a large pile of dry leaves had collected in the school’s yard. The following spring, Ms. Moore noticed the same pile of leaves was smaller, broken down, wet, and stuck together. Which change best explains what happened to the leaves?

• A. The leaves were rusting.

• B. The leaves were melting.

• C. The leaves were burning.

• D. The leaves were decaying

Tags

NGSS.MS-LS2-3

Ms. Wysong's class 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? Select ALL that apply.

• A. Ice cubes melt into liquid at high temperatures.

• B. A piece of bread is toasted resulting in toast.

• C. A cake is baked.

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

• E. Iron turns to rust when it is exposed to oxygen.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mrs. Jacobs showed her class a science video about chemical changes. Which of the following examples does NOT result in a change of material? Select ALL that apply.

• A. iron rusting

• B. ripping paper

• C. water evaporating

• D. water freezing

• E. baking cupcakes

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-4

The matter around us is always changing in different ways. Which situations describe a change that results in a new kind of matter with different characteristics? Select ALL that apply.

• A. a banana on a plate turns brown

• B. a puddle on a sidewalk freezes into ice

• C. milk goes sour

• D. a mom bakes cookies for her son

• E. a chef chops up vegetables to make a salad

Tags

NGSS.MS-PS1-2