States of Matter/Heat Flow

Front

What is radiation?

Back

Radiation is the transfer of heat energy through electromagnetic waves. It does not require a medium to travel, which is why we can feel the heat from the sun even though it is in space.

Front

What determines the temperature of a substance?

Back

The speed of the molecules in a substance determines its temperature. Faster-moving molecules indicate higher temperatures.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or observed in an experiment. In the context of temperature affecting the decaying process of apples, the decaying process is the dependent variable.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm air or liquid rises, while cooler air or liquid sinks, creating a circulation pattern.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor (gas) when it is heated. This process occurs at the surface of the liquid.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one.

Front

What is the difference between temperature and heat?

Back

Temperature is a measure of the average kinetic energy of the molecules in a substance, while heat is the energy transferred between substances due to a temperature difference.

Front

What is the role of heat in changing states of matter?

Back

Heat energy is required to change the state of matter. For example, adding heat can change ice (solid) to water (liquid) and then to steam (gas).

Front

What is the process of melting?

Back

Melting is the process where a solid turns into a liquid when heat is applied. For example, ice melts into water when heated.

Front

What is freezing?

Back

Freezing is the process where a liquid turns into a solid when it loses heat. For example, water freezes into ice when cooled.