PS.5.1.2 (5.P.2.3) #2: Schoolnet

Which describes a chemical change?

• sugar dissolving in tea

• sunshine warming a sidewalk

• scissors cutting paper into pieces

• acid in the stomach digesting food

Tags

NGSS.MS-PS1-2

A type of cold pack has two separate sections inside. One section contains a liquid and the other section contains a powder. When the cold pack is squeezed, the section that holds the liquid breaks. When the liquid combines with the powder, the pack becomes very cold.

Which is the BEST explanation why the temperature of the pack decreases when the liquid and powder combine?

• A mixture forms.

• A solution forms.

• A chemical change occurs.

• Thermal energy is used.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which property of sugar remains after sugar is dissolved in water?

• color

• taste

• shape

• texture

Tags

NGSS.MS-PS1-2

What happens to colored sugar when it is added to water?

• The sugar reacts and colors the water.

• The sugar becomes white and the water changes color.

• The sugar evaporates and the water changes color.

• The sugar dissolves and colors the water.

Tags

NGSS.MS-PS1-2

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

The first step in the water cycle is evaporation. What gives water the energy to evaporate?

• sunlight

• wind

• clouds

• waves

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Which of these is an example of a new substance being formed?

• a nail rusting

• a wall being painted

• water changing to steam

• paper being folded

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which example shows a new substance being formed?

• a candle burning

• a shoelace being tied

• a pipe being cut in half

• a block of ice melting

Tags

NGSS.MS-PS1-2

Which is an example of a different substance being formed?

• glass breaking

• metal melting

• water freezing

• wood burning

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which best explains what happens to the inside of an egg when it is

boiled?

• The liquid becomes solid.

• The solid becomes a gas.

• The solid becomes a liquid.

• The liquid becomes a gas.

Tags

NGSS.MS-PS1-4