PSSA 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 Science flashcards as text
Which of the following best describes a food chain?
Answer: A sequence showing how energy passes from one organism to another
A food chain shows the sequence in which energy is transferred from one organism to another through feeding relationships.
What is the difference between a mixture and a compound?
Answer: A mixture is physically combined and can be separated, while a compound is chemically bonded
A mixture is a physical combination of substances that can be separated, while a compound involves chemical bonding of elements in fixed ratios.
Which layer of Earth's atmosphere contains the ozone layer?
Answer: Stratosphere
The ozone layer is located in the stratosphere, approximately 15 to 35 kilometers above Earth's surface.
What process do plants use to make their own food?
Answer: Photosynthesis
Photosynthesis is the process by which plants convert light energy, water, and carbon dioxide into glucose and oxygen.
Which of the following is NOT a renewable energy source?
Answer: Natural gas
Natural gas is a fossil fuel, making it a nonrenewable energy source that cannot be replenished on a human timescale.
What is Newton's Third Law of Motion?
Answer: For every action there is an equal and opposite reaction
Newton's Third Law states that for every action force, there is an equal and opposite reaction force.