PSSA PSSA Physical Science

Question 1

What is the definition of density?

Accepted Answer

The mass of an object per unit volume

Answer

The amount of space an object takes up

Answer

The weight of an object in grams

Answer

The force applied to an object per unit area

Question 2

What is acceleration?

Accepted Answer

The rate of change of velocity over time

Answer

The total distance traveled by an object

Answer

The speed of an object at a specific moment

Answer

The force required to move an object

Question 3

Which of the following is an example of potential energy?

Accepted Answer

A rock at the top of a hill

Answer

A moving car

Answer

A flowing river

Answer

A spinning wheel

Question 4

What happens to the volume of a gas when pressure increases (at constant temperature)?

Accepted Answer

The volume decreases

Answer

The volume increases

Answer

The volume remains the same

Answer

The volume doubles

Question 5

Which of the following describes an element?

Accepted Answer

A pure substance made of only one type of atom

Answer

A substance made of two or more different types of atoms chemically bonded

Answer

A mixture of two or more substances

Answer

A substance that can be broken down by heating

Question 6

What is friction?

Accepted Answer

A force that opposes the motion of objects moving against each other

Answer

The force that pulls objects toward Earth

Answer

The energy stored in compressed springs

Answer

The tendency of an object to remain at rest