T1 Thermal Energy Unit Test Review

You hold an ice cube in your hand. Why does the ice cube feel cold to you?

• Heat is transferred from your hand to the ice cube
• Heat is transferred from the ice cube to the air
• Cold is transferred from your hand to the ice cube
• Cold is transferred from the ice cube to the air

Sophia places a plate of food under a lamp to keep it warm. By which method is heat transferred to the food?

• conduction
• convection
• radiation
• transformation

Luciana notices that the air in her science classroom is much warmer than the air in her math classroom. Which describes how the air particles are different in her colder math classroom?

• The move faster on average
• The are vibrating
• They have less average energy
• The move more freely

A glass of ice water sat out in the sun and the ice absorbed heat and eventually became liquid water. What did the states of the ice and the liquid water have in common?

• Both had definite shape.
• Both had definite volume
• Neither had definite shape or volume.
• Both had definite shape or volume

The diagrams show the arrangement of the particles in a sample of a material. The particles in the left diagram undergo a change in state, resulting in the arrangement in the diagram on the right. What change of state most likely took place?

• boiling
• condensation
• freezing
• melting

A trip to the beach on a nice, sunny day involves thermal energy, heat, and temperature. Which statement uses the three related terms correctly?

• When I wade in the cool ocean, heat causes thermal energy from the water to raise the temperature of my feet.
• When I walk on the warm beach, thermal energy in the sand increases the temperature of my feet, and heat has no involvement in the process.
• When I walk on the warm beach, the temperature of my feet increases because of the thermal energy of the sand, which is also the heat of the sand.
• When I walk on the warm beach, heat is the amount of thermal energy transferred from the warm sand to my cool feet due to the temperature difference.

Bonita is preparing dinner for her family, and heat is transferred during several stages of the preparation. Which step involves transferring heat by convection?

• She places a spoon in hot water, and the spoon warms.
• A pan is placed on a lit burner, and the pan becomes warmer.
• Hot water in the bottom of the pan rises, warming the water at the top of the pan.
• She can feel energy from the burner from several centimeters away.

In a heat wave in June 2017, temperatures in some southwestern U.S. states reached 49°C (120°F). To help cope with these high temperatures, some residents wrapped their outside metal door handles in cloth. How did this help the situation?

• Cloth and metal are both insulators, so adding cloth increases protection from the heat.
• Cloth is a conductor, so it conducts heat less than an insulator, such as a metal door handle.
• Cloth is an insulator, so it conducts heat less than a conductor, such as a metal door handle.
• Cloth is a conductor that conducts heat away from the door, whereas a metal door handle keeps the heat in the door.

What caused the Popsicle to melt?

• The Popsicle was heated by the warmer air around it
• Ingredients in the Popsicle evaporated, causing the pop to lose shape.
• Energy released from the Popsicle was absorbed by the plate.
• Cool air released from the Popsicle generated energy that melted it.

You probably use the term heat many times a day. As an example, when you cook, dinner, you heat your dinner on a hot stove. When you place a piece of cool metal in the sun, it is heated by the sun’s energy. Why is heat the correct term to use in these examples?

• They show that when objects are touching, they are the same temperature.
• They show that heat flows from something warmer to something cooler.
• They indicate that heat is created to raise the temperature of something.
• They indicate that the kinetic energy of the particles decreases when something is heated.