SPS7cd Assessment Remediation

During a phase change, when a substance melts or boils, energy is being absorbed and the temperature:

• A. continues to increase at regular intervals.

• B. begins to decrease rapidly.

• C. remains constant.

• D. increases by a factor of ten

Jayla and her grandma are designing a lunchbox. The lunchbox will be made out of thin fabric and a zipper, with an extra layer of material to help keep food cold all morning. Jayla is deciding whether the extra layer of material will be foam or rubber. The specific heat capacity of each material is shown in the table. Using the data, explain which material would be best to include in the lunchbox.

• The best material to use is rubber, since it is the best conductor. A conductor will help increase the transfer of heat from inside of the lunchbox to outside of the lunchbox.

• The best material to use is rubber, since it is the best insulator. An insulator will help slow the transfer of heat from outside of the lunchbox to inside of the lunchbox.

• The best material to use is foam, since it is the best conductor. A conductor will help increase the transfer of heat from inside of the lunchbox to outside of the lunchbox.

• The best material to use is foam, since it is the best insulator. An insulator will help slow the transfer of heat from outside of the lunchbox to inside of the lunchbox.

At which point on the curve do the particles in the substance have the most kinetic energy?

• A. U

• B. W

• C. X

• D. Z

When water changes phase, it gains or loses energy. During which of the following types of phase changes do the particles of water gain energy?

• freezing

• condensation

• deposition

• melting

The picture shows a phase change diagram. What is taking place at the line labeled Y?

• A. melting

• B. freezing

• C. sublimation

• D. Evaporation

Why are most oven mitts made out of cloth?

• Cloth is an insulator and cannot conduct heat.

• Cloth is a conductor and blocks the heat.

• Cloth is the only material available to make oven mitts.

• Cloth cools a pan down as soon as it is touched.

The air around a pool and the water in the pool receive equal amounts of energy from the sun. Why does the air experience a greater increase in temperature than does the water?

• A. The specific heat of water is less than that of air.

• B. The specific heat of water is greater than that of air.

• C. The latent heat of water is less than that of air.

• D. The latent heat of water is greater than that of air.

What is phase change?

• the physical change of a substance from one state to another

• the potential change of a substance from one state to another

• the chemical change of a substance from one state to another

• the difference in temperature of a substance from one state to another

An ice cube melts on a hot summer day because the energy of the particles

• decreases over a period of time and is lost.

• increases and the particles move apart.

• causes them to lock together.

• is converted into potential energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The graph below shows how the temperature of a sample of water changes as energy is added to the sample. During which interval does a gas form?

• Q to R

• R to S

• S to T

• T to U

Answer explanation

A gas forms during the interval T to U, where the temperature remains constant as the water transitions from liquid to gas (vaporization) due to added energy. This is indicated by the flat line on the graph.

Tags

NGSS.MS-PS1-4