Thermal Properties Flashcard

Front

Javier made a cup of hot coffee and left it on the table in his room. What happens to the coffee over time?

Back

It gets colder until it reaches room temperature

Answer explanation

The coffee cools down over time due to heat transfer to the surrounding air, eventually reaching room temperature. It does not stay hot forever, get hotter, or evaporate immediately.

Front

When Mira places a metal spoon in a hot cup of coffee, what is the process called when heat moves from the hot coffee to the cooler spoon?

Back

Conduction

Answer explanation

The process of heat transfer from the hot coffee to the cooler spoon is called conduction. This occurs when two objects at different temperatures are in direct contact, allowing heat to flow from the hotter object to the cooler one.

Front

What is the average kinetic energy of all the molecules in an object called?

Back

Temperature

Front

What is conduction?

Back

Transfer of heat through direct contact

Front

Mariah is holding a hot cup of coffee. Why do her hands get warm?

Back

Because of conduction

Answer explanation

Mariah's hands get warm due to conduction, which is the transfer of heat through direct contact. The hot coffee cup heats her hands as they touch it, causing the warmth to transfer from the cup to her skin.

Front

What is the purpose of the empty space in a thermos?

Back

To prevent heat transfer

Answer explanation

The empty space in a thermos is designed to prevent heat transfer. It acts as an insulator, minimizing heat loss or gain, which keeps liquids hot or cold for longer periods.

Front

During a science experiment, Aaliyah heats up a metal rod. What happens to the electrons in the atoms of the metal?

Back

They absorb energy

Answer explanation

When Aaliyah heats the metal rod, the electrons in the atoms absorb energy from the heat. This energy causes them to move to higher energy levels, which is a common behavior of electrons when exposed to heat.

Front

Why are the insides of thermoses often made of shiny substances?

Back

To reflect radiation

Answer explanation

The insides of thermoses are often made of shiny substances to reflect radiation, which helps maintain the temperature of the contents by minimizing heat loss or gain through radiation.

Front

What is the third type of heat transfer mentioned in the movie?

Back

Convection

Front

In which states of matter does convection occur?

Back

Liquids and gases

Answer explanation

Convection occurs in liquids and gases due to the movement of warmer, less dense regions rising and cooler, denser regions sinking. Solids do not flow, so convection does not occur in them.