Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low

• low to high

• high to high

Tags

NGSS.MS-PS3-4

What causes phase changes?

• adding or taking away particles

• adding or taking away matter

• adding or taking away heat energy

• adding or taking away physical properties

Tags

NGSS.MS-PS1-4

Which of the following is a physical change?

• Ice melting

• Baking potatoes

• Rusty nail

• Rotting wood

Tags

NGSS.MS-PS1-4

At higher temperatures

• particles in an object have less energy

• particles in an object move faster

• a gas contracts

Tags

NGSS.MS-PS1-4

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as

• decanting

• evaporation

• loading

• chromatography

Tags

NGSS.MS-PS1-4

People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?

• mechanical to thermal to electrical

• chemical to mechanical to thermal

• mechanical to chemical to sound

• chemical to sound to electrical

Tags

NGSS.MS-PS1-4

If energy is taken out of the substance, and the substance changed into a liquid,

• the substance started as a solid

• the substance started as a liquid

• the substance stayed the same

• the substance started as a gas

Tags

NGSS.MS-PS1-4

Is freezing juice a physical or chemical change?

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Develop a model to predict what happens to the particles of a substance when thermal energy is removed.

• Particles move faster and spread apart

• Particles slow down and come closer together

• Particles remain unchanged

• Particles change into a different substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Explain how the addition of thermal energy can change the state of a pure substance from solid to liquid.

• Thermal energy decreases particle motion, causing a solid to form

• Thermal energy increases particle motion, causing a solid to melt into a liquid

• Thermal energy has no effect on the state of a substance

• Thermal energy changes the chemical composition of the substance

Tags

NGSS.MS-PS1-4