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Standardized Achievement Science Flashcards

7 cards from real Achievement Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Standardized Achievement Science flashcards as text

  1. Which type of wave requires a medium to travel through?

    Answer: Mechanical waves

    Mechanical waves, such as sound, need a physical medium (solid, liquid, or gas) to propagate.

  2. In the periodic table, elements in the same column (group) share which characteristic?

    Answer: The same number of valence electrons

    Elements in the same group have the same number of valence electrons, giving them similar chemical properties.

  3. A food web shows that rabbits eat grass and foxes eat rabbits. If the rabbit population greatly decreases, what most likely happens to the fox population?

    Answer: It decreases

    With fewer rabbits as prey, foxes have less food, causing their population to decline.

  4. What is the atomic number of an element?

    Answer: The total number of protons in the nucleus

    Atomic number equals the number of protons in an atom's nucleus and uniquely identifies each element.

  5. Which property of light explains why a straw appears bent when placed in a glass of water?

    Answer: Refraction

    Refraction occurs when light changes speed as it passes from one medium to another, bending its path.

  6. Earth's seasons are primarily caused by which factor?

    Answer: The tilt of Earth's axis

    Earth's 23.5° axial tilt causes different hemispheres to receive more direct sunlight at different times of year, creating seasons.

  7. Which process describes water changing from liquid to gas at the surface of a lake?

    Answer: Evaporation

    Evaporation is the process by which liquid water converts to water vapor at the surface without boiling.