GED Section 3 Science

Review 72 GED-SECTION-3-SCIENCE practice questions with answer explanations and community insights.

Question 1

In an acid base reaction, an acid reacts with a base to produce water and a salt. The pH scale can be used to describe the acidity of a liquid. Look at the diagram below. Which two liquids could undergo an acid base reaction?

  1. bleach and ammonia
  2. lye and ammonia
  3. blood and saliva
  4. bleach and vinegar
  5. stomach acid and beer

Question 2

Which of the following is NOT true about gravity?

  1. The more massive two objects are, the greater the gravitational force between them.
  2. Gravitational force between two objects depends only on the mass of the larger object.
  3. Gravitational force between two objects depends on the distance between them.
  4. People can jump higher on the moon than on Earth because the gravitational force between a person and the moon is lower than the gravitational force between a person and the Earth.
  5. A gravitational force exists between the moon and the sun.

Question 3

Change of phase is a process whereby matter changes form (solid, liquid, gas). Which one of the following constitutes a phase change?

  1. condensation of water vapor
  2. photosynthesis
  3. digestion of food
  4. dry-cleaning
  5. exhaling

Question 4

Two negatively charged spheres -

  1. repel each other.
  2. attract each other.
  3. neither attract nor repel each other.
  4. can either attract or repel each other depending on their position.
  5. attract each other only when the distance between them is small.

Question 5

Which statement about energy and/or matter is incorrect?

  1. Matter and energy can’t be destroyed.
  2. Matter and energy can’t be created.
  3. All matter tends toward more disordered states.
  4. Energy can be stored and transferred.
  5. Heat energy is composed of heat atoms.
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