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 the carbon cycle?
Answer: The continuous exchange of carbon between living organisms and the environment
The carbon cycle describes how carbon atoms are continuously exchanged among living organisms, the atmosphere, oceans, and land.
What is the primary function of the circulatory system?
Answer: To transport blood, oxygen, and nutrients throughout the body
The circulatory system transports blood, oxygen, nutrients, and waste products throughout the body.
Which type of wave does NOT require a medium to travel through?
Answer: Electromagnetic waves
Electromagnetic waves (such as light and radio waves) can travel through a vacuum and do not require a medium.
What is an ecosystem?
Answer: A community of living organisms and their physical environment interacting as a system
An ecosystem includes all living organisms (biotic) and nonliving components (abiotic) of an environment and their interactions.
Which of the following describes a conductor?
Answer: A material that allows electricity to flow freely through it
A conductor is a material that allows electric charges to flow freely, such as copper wire.
What is the main cause of seasons on Earth?
Answer: The tilt of Earth's axis as it orbits the Sun
Seasons are caused by the 23.5-degree tilt of Earth's axis, which determines how directly sunlight strikes different regions as Earth orbits the Sun.