Amaral Final Semester 1 24-25

Front

Helium balloons rise on earth because

Back

Helium is less dense than air.

Front

As objects are heated, what happens to their volume and density?

Back

They expand so volume goes up and density goes down.

Front

On which temperature scale can there NEVER be negative numbers?

Back

Kelvin.

Front

True or False: The Law of Conservation of Energy states that energy cannot be created or destroyed, it can only change forms.

Back

True.

Front

How is 34567.01 expressed in scientific notation with three significant figures?

Back

3.46 x 10^4.

Front

What is density?

Back

Density is mass per unit volume of a substance.

Front

What happens to the density of a substance when it is heated?

Back

The density decreases as the substance expands.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

What is the significance of the Kelvin scale in thermodynamics?

Back

It is an absolute temperature scale with no negative values.

Front

What does the Law of Conservation of Energy imply about energy transformations?

Back

Energy can change forms but the total energy remains constant.