PSSA Physical Science Flashcards
6 cards from real PSSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 PSSA Physical Science flashcards as text
What is the definition of density?
Answer: The mass of an object per unit volume
Density is defined as the mass of a substance divided by its volume (D = m/v).
What is acceleration?
Answer: The rate of change of velocity over time
Acceleration is the rate at which an object's velocity changes over time, measured in m/s².
Which of the following is an example of potential energy?
Answer: A rock at the top of a hill
A rock at the top of a hill has gravitational potential energy due to its position above the ground.
What happens to the volume of a gas when pressure increases (at constant temperature)?
Answer: The volume decreases
According to Boyle's Law, the volume of a gas decreases when pressure increases at constant temperature.
Which of the following describes an element?
Answer: A pure substance made of only one type of atom
An element is a pure substance consisting of only one type of atom, and cannot be broken down into simpler substances by chemical means.
What is friction?
Answer: A force that opposes the motion of objects moving against each other
Friction is a force that resists the relative motion of surfaces in contact with each other.