Bell Work - Mon., Dec. 9, 2024

Front

What happens to candy on a hot day?

Back

Heat transfers from the environment to the candy, causing it to melt.

Front

What is a physical change?

Back

A physical change is a change where no new substance is formed, and it can be reversed, like dissolving candy.

Front

What occurs when heat is transferred between two objects?

Back

Heat will continue to transfer until both objects are the same temperature.

Front

What is an endothermic reaction?

Back

An endothermic reaction is one where energy is absorbed from the surroundings.

Front

What is evidence of an exothermic reaction?

Back

An increase in temperature indicates that an exothermic reaction has occurred.

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or area to another.

Front

What is the melting point?

Back

The melting point is the temperature at which a solid becomes a liquid.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new substances and is usually irreversible.

Front

What is an example of a physical change?

Back

Dissolving sugar in water is an example of a physical change.

Front

What does it mean for a reaction to be reversible?

Back

A reversible reaction is one where the products can be converted back to the original reactants.