Chemical and Physical Changes

A teacher takes a tray of ice cubes out of the freezer. Each student takes an ice cube and holds it in their hands. They make the observations listed in the chart. The student claims that changing the temperature of the water causes a physical change that turns water into ice.

Which argument BEST supports the student’s claim?

• The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.

• The ice cube is freezing in the student’s hand since the hands are much warmer than the ice. Heat is being removed from the ice, which causes the particles to move slower.

• The ice cube is melting in the student’s hand since state is changing from a solid to a liquid. Heat is being removed from the ice, which causes the particles to move faster.

• The ice cube is melting in the student’s hand since state is changing from a liquid to a solid. Heat is being added to the ice, which causes the particles to move slower.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following is NOT a clue that a chemical change has occurred? 

• change of state of matter

• color change

• production of a gas

• production of heat

Tags

NGSS.MS-PS1-2

A change in a state of matter is represented in the diagrams below. Which statement describes the process occurring from beaker 1 to beaker 2?

• Solid ice is changing into gas.

• Liquid water is changing to gas.

• Solid ice is melting to liquid water.

• Gaseous steam is condensing to solid ice.

Tags

NGSS.MS-PS1-4

Which of the following changes is NOT a physical change?

• getting a haircut

• sharpening a pencil

• spoiled milk

• cracking an egg into a bowl

Mark is observing a burning candle. He notices the melted wax drips down the side of the candle and hardens again. The candle has _____. 

• formed a new substance

• undergone a physical change

• undergone a chemical change

• undergone a physical and chemical change

Tags

NGSS.MS-PS1-2

A change in some properties of matter that does not form a different kind of matter is a what?

• chemical change

• physical change

• chemical reaction

• temperature change

Tags

NGSS.MS-PS1-4

Is a change in shape a chemical or physical change?

• chemical

• physical

Is a change in physical state a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-4

____________________ occurs when a liquid's particles slow down and the substance changes to a solid.

• Boiling

• Evaporating

• Freezing

• Melting

Tags

NGSS.MS-PS1-4

________________ occurs when a solid's particles speed up and the substance changes to a liquid.

• Evaporating

• Boiling

• Freezing

• Melting

Tags

NGSS.MS-PS1-4