5.P.2.3

Over time, iron becomes rust when it combines with water and oxygen. Which type of change must occur for rust to form?

• chemical
• mechanical
• nuclear
• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A family goes camping and creates a fire to roast marshmallows. The next morning, the kids notice that the logs are no longer there, and all that remains are ashes. Which best explains why the ashes from a log are evidence of a chemical change?

• The color of the wood changed from brown to gray. 
• The wood breaks down into smaller matter when burned.
• The ashes cannot be put back together to create a log again.
• Something was added to the log, and it cannot be removed. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is a chemical change?

• frying an egg
• boiling water
• breaking a glass cup
• crushing a piece of bread

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which best explains why melting ice is a physical change instead of a chemical change?

• It does not smell bad.
• It changes from a solid to a liquid.
• It does not form a new substance.
• It changes quietly with no loud sound.

Tags

NGSS.MS-PS1-4

Which is a physical change involving an egg?

• frying an egg
• boiling an egg
• breaking an egg

Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?

• chemical
• electrical
• thermal
• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which change would result in a new substance being formed?

• sugar dissolving in water
• a glass bottle breaking
• ice melting in a bowl
• a metal can rusting

Tags

NGSS.MS-PS1-2

What changes occur when an ice cube is heated to a temperature above 100°C?

• The ice cube will change from a liquid to a solid.
• The ice cube will change from a gas to a liquid.
• The ice cube will change from a solid to a liquid to a gas.
• The ice cube will change from a solid to a liquid and then back to a solid.

Tags

NGSS.MS-PS1-4

ennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.
• It was a chemical change, because the rubber tires were deflated.
• It was a chemical change, because rust can be removed from the metal.
• It was a chemical change, because rust is a new substance on the metal.

Tags

NGSS.MS-PS1-2

Tonya observes a mixture of two clear liquids in a container to see if a chemical change occurs. Which observation demonstrates the mixture is undergoing a chemical change?

• The mixture remains at a constant temperature.
• A gas forms after the liquids are mixed.
• One liquid floats on top of the other.
• The mixture does not change color.

Tags

NGSS.MS-PS1-2