7th Midterm Review and Winter Break Flashcardizz

Front

What is convection?

Back

Convection is the heat transfer process where warmer air or liquid rises and cooler air or liquid sinks, creating a circulation pattern.

Front

What indicates a new substance has formed in a chemical reaction?

Back

The formation of a yellow solid that settles to the bottom of the beaker indicates a new substance has formed.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the condition where two substances in physical contact exchange no heat energy and are at the same temperature.

Front

What does a subscript in a chemical formula represent?

Back

A subscript indicates the number of atoms of an element in a molecule.

Front

What happens to the heat when ice is added to water?

Back

The heat from the water moves into the ice, causing the water to cool down.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change, as it changes from solid to liquid without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, such as rust forming on iron.

Front

What is a coefficient in a chemical equation?

Back

A coefficient indicates the number of molecules or moles of a substance in a chemical reaction.