Science Flashcards
7 cards from real ACT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Science flashcards as text
A food web diagram shows arrows pointing from grass to rabbits to foxes. The arrows represent the direction of:
Answer: Energy flow
In food webs, arrows point in the direction energy flows, from prey to predator.
A bar graph compares the same measurement across five groups. To find which group changed most from the control, you should compare each bar to:
Answer: The control group's bar
Change from control is measured relative to the control group's value.
An experiment keeps light, water, and soil identical across all pots, varying only seed type. Light, water, and soil are the:
Answer: Controlled (constant) variables
Factors held constant across groups are controlled variables.
On a half-life graph, a radioactive sample drops from 80 g to 40 g in 5 years. After another 5 years it should be about:
Answer: 20 g
Each half-life halves the amount, so 40 g becomes 20 g after the next 5 years.
A passage describes a hypothesis that was NOT supported by the experimental data. The most scientifically appropriate next step is to:
Answer: Revise the hypothesis or design a new experiment
Unsupported hypotheses are revised and retested as part of the scientific method.
Two graphs use the same x-axis but different y-axis scales. When comparing them, a student must be careful because:
Answer: Different scales can make similar changes look different
Mismatched y-axis scales can exaggerate or minimize apparent differences.
A measurement reads 100°C for a liquid that began boiling. The liquid is most likely:
Answer: Pure water at sea level
Pure water boils at 100°C at standard atmospheric pressure.