Science Flashcards
7 cards from real CAASPP 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
Which of the following is an example of a renewable energy source?
Answer: Solar energy
Solar energy is renewable because it comes from the Sun, which continuously produces energy and will not be depleted by human use.
In an experiment, a student rolls a ball down a ramp and measures how far it travels on a flat surface. What does Newton's First Law predict about the ball's motion on a frictionless surface?
Answer: It would continue moving at constant speed indefinitely
Newton's First Law states that an object in motion stays in motion at constant velocity unless acted upon by an unbalanced force like friction.
Which process in the water cycle involves water vapor cooling and turning into liquid water droplets that form clouds?
Answer: Condensation
Condensation occurs when water vapor in the atmosphere cools enough to change into tiny liquid droplets, forming clouds and fog.
A chromosome is made of tightly coiled DNA. What is the primary function of DNA in a cell?
Answer: To carry genetic instructions for building proteins and traits
DNA contains the genetic code — sequences of base pairs that serve as instructions for making proteins and determining inherited traits.
Two substances are mixed together and produce a gas, change color, and release heat. What type of change has occurred?
Answer: Chemical change
Evidence of a chemical change includes gas production, color change, and heat release, indicating new substances with different properties have formed.
Which characteristic of sound waves determines whether a sound is perceived as high-pitched or low-pitched?
Answer: Frequency
Frequency — the number of wave cycles per second (measured in Hertz) — determines pitch; higher frequency produces higher pitch.
During natural selection, which individuals in a population are most likely to survive and reproduce?
Answer: Those with traits best suited to the environment
Natural selection favors individuals with heritable traits that improve survival and reproduction in their specific environment, passing those traits to offspring.