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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. What does the acronym SONAR stand for?
(a) Situations in Navigation and Retreiving.
(b) Sounds Near and Ranging.
(c) Sound Navigation and Ranging.
(d) Somatic Navigation of Radar.

2. Under what situation does the eye perceive a reflection of light?
(a) In looking at a solid.
(b) When the concave lens is distorted.
(c) When the convex lens is distorted.
(d) When the retina has no rods or cones.

3. What does RADAR use?
(a) Radiation.
(b) Recharged particles.
(c) Restored particles.
(d) Radio waves.

4. Why do electromagnets use the forces of attraction and repulsion alternately to keep machines running?
(a) Because an electrical current can only stay polarized.
(b) Because electrons are always positively charged.
(c) Because electrical current can be reversed or shut off.
(d) Because electrons inherently move towards neutrality.

5. Where are the pumpkins placed?
(a) In a blender.
(b) Into a pie.
(c) In a food processor.
(d) Into the belly of a transport plane.

6. What makes waves different from molecules?
(a) Waves pass through matter.
(b) Only their effects are different.
(c) Waves are not actually real.
(d) Waves vibrate, but matter doesn't.

7. What are happening to the crates at the opening to Chapter 2 in this section?
(a) They are being burned.
(b) They are being destroyed by a caveman with an axe.
(c) They are being stacked into rows.
(d) They are being destroyed by a mammoth with an axe.

8. What is a core of wire wound around an iron core?
(a) An electromagnet.
(b) An altimeter.
(c) A bushing coil.
(d) A demagnitizer.

9. What is another term for electromagnetic waves?
(a) Quantums.
(b) Rays.
(c) Quarks.
(d) Links.

10. What is one thing an electrical current can measure?
(a) Particles in the air.
(b) Opacity.
(c) Frequency.
(d) Density.

11. What type of input do we use to input binary code on a phone?
(a) Negative.
(b) Code.
(c) Fingertip.
(d) Positive.

12. What parts of ROM memory can be changed?
(a) The upper chip layers.
(b) None.
(c) The binary code.
(d) The lower chip layers.

13. What charge do untouched electrons carry?
(a) It varies.
(b) Neutral.
(c) Negative.
(d) Positive.

14. Where can the electromagnetic fields exist that sound waves cannot?
(a) Through dense matter.
(b) In a vacuum.
(c) In the brain.
(d) Outside of matter.

15. How are signals and messages created out of light and radio waves?
(a) Interrupting wave patterns.
(b) Causing the waves to ocillate at a different hertz.
(c) Coalescing the waves into bundles.
(d) Harnessing the shorts bursts of energy.

Short Answer Questions

1. How do mirrors reflect an image?

2. What is the meaning of the acronym LASER?

3. What two elements combine to make a body scanner?

4. How does Macaulay illustrate the idea of a chemical reaction to produce electricity?

5. What does the frequency of sound waves create?

(see the answer keys)

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