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GED Science Test #5 2 Flashcards

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

Read the first 6 GED Science Test #5 2 flashcards as text

  1. What happens to atoms during a chemical reaction?

    Answer: Atoms are rearranged to form new substances

    During a chemical reaction, atoms are rearranged — bonds are broken and new bonds form to create new substances. Matter is neither created nor destroyed (Law of Conservation of Mass).

  2. Which type of rock is formed from cooled magma or lava?

    Answer: Igneous

    Igneous rocks form when magma (underground) or lava (surface) cools and solidifies. Examples include granite (intrusive) and basalt (extrusive).

  3. A cell without a membrane-bound nucleus is called a:

    Answer: Prokaryote

    Prokaryotes (bacteria and archaea) lack a membrane-bound nucleus. Eukaryotes, which include plants, animals, fungi, and protists, have their DNA enclosed in a nucleus.

  4. What is the SI unit for measuring electric current?

    Answer: Ampere (A)

    The ampere (A) measures electric current (flow of charge). Volts measure electric potential, ohms measure resistance, and watts measure power.

  5. The greenhouse effect occurs when:

    Answer: Gases in the atmosphere trap heat radiated from Earth's surface

    Greenhouse gases (CO₂, methane, water vapor) in the atmosphere absorb and re-emit infrared radiation from Earth, trapping heat. This natural process is enhanced by human activities.

  6. An experiment tests whether fertilizer affects plant height. The scientist grows 10 plants with fertilizer and 10 without. The plants without fertilizer are the:

    Answer: Control group

    The control group does not receive the treatment being tested (fertilizer). Comparing the experimental group (with fertilizer) to the control group (without) shows the effect of the variable.