Heat Quiz 2 Tuesday

What do the terms 'hot' and 'cold' describe?

• amount of heat energy

• temperature

Answer explanation

Temperature measures how hot or cold an object is.

When an object gains heat, its temperature decreases

• Yes

• No

Answer explanation

When an object gains heat, its temperature does not decrease.

Heat is the same as temperature

• Yes

• No

• Sometimes

Answer explanation

Temperature is a measure of the degree of hotness of an object, while heat is a form of energy.

Heat is a form of energy that flows from a region of higher temperature to a region of lower temperature.

• Yes

• No

Coffee cup A has more heat energy than coffee cup B.

• Yes

• No

Answer explanation

The same object will have more heat energy at a higher temperature than at a lower temperature.

Which one has more heat energy?

• coffee cup

• bath tub

Answer explanation

They are both at the same temperature but the bath tub has more heat energy. Temperature is NOT the same as heat

A spark from a sparkler has a temperature of 1600⁰C. The cup of hot tea has a temperature of 90⁰C. If a spark touches you or the cup of tea is poured on your hand, which one will feel hotter?

• Sparkler

• Hot tea

• Both

• None

Answer explanation

The spark is very tiny and has very little heat energy, so it will not feel hot. The cup of hot tea has more heat energy although it is at a lower temperature so it will feel hotter

After one hour, the temperature of the milk will _______ and the temperature of the surrounding air will _______.

• increase, increase

• increase, decrease

• decrease, increase

• decrease, decrease

Answer explanation

Heat energy will flow from the hotter milk to the cooler air.

After a very long time, the temperature of the milk and air will become _______.

• same

• different

Answer explanation

Heat will keep flowing from the hotter milk to the cooler air until their temperatures become the same.

Which statement is correct?

• Temperature tells us how quickly an object becomes hot or cold

• Temperature tells us the amount of heat energy an object has

• Temperature is a measure of the degree of hotness of an object