Quiz on Thermal Energy and Molecules

What does temperature measure?

• The size of the molecules in a substance

• The speed of light in a vacuum

• The average speed of the molecules in a substance

• The number of molecules in a substance

If molecules in a substance move faster, what happens to the temperature?

• It decreases

• It increases

• It stays the same

• It depends on the type of substance

Which of the following is true at absolute zero?

• Molecules move at their fastest speed

• Molecules stop moving completely

• Molecules move at their slowest possible speed

• Molecules expand

What is the main factor that causes something to change temperature?

• Changes in molecule size

• Changes in the number of molecules

• Changes in molecule movement

• Changes in molecular structure

How is an average calculated?

• By dividing the smallest number by the largest number

• By adding all numbers and dividing by the count of numbers

• By subtracting the smallest number from the largest

• By multiplying all numbers together

In Diagram 1, the average speed of molecules is calculated as 10. What does this say about its temperature?

• It is lower than the temperature of Diagram 2

• It is higher than the temperature of Diagram 2

• It is the same as the temperature of Diagram 2

• It cannot be determined

What happens to the air molecules when the air gets warmer?

• They stop moving

• They move faster

• They move slower

• They shrink

Which statement is most accurate about warmer air?

• Molecules in warmer air are denser

• Molecules in warmer air move faster

• Molecules in warmer air are larger

• Molecules in warmer air move slower

Why is modeling helpful in science?

• It eliminates the need for experimentation

• It helps visualize concepts that cannot be directly observed

• It guarantees accurate predictions

• It provides exact representations of reality

Which of the following factors could help you decide between two heating systems for a school?

• The size of the water tank and the water temperature

• The shape of the school building

• The number of classrooms

• The color of the heating system