View a FREE sample

This quiz consists of 5 multiple choice and 5 short answer questions through Part 2, Harnassing the Elements, Exploiting Heat, Nuclear Power, pp. 142-173.

Multiple Choice Questions

1. What is the term for the process of molecules moving further apart in convection?
(a) Inference.
(b) Expansion.
(c) Acceleration.
(d) Trajection.

2. How does a wedge move an object up an inclined plane?
(a) It lowers the plane so the object slides.
(b) It uses the effect of gravity.
(c) It doesn't ; the wedge moves the plane itself to raise an object.
(d) It forces the object to reduce the effects of gravity.

3. What imparts movement into the air or water around them on a ship?
(a) Bits.
(b) Propellers.
(c) Levers.
(d) Cams.

4. What is the principle behind the action of any machine?
(a) The amount of energy it saves.
(b) The amount of energy it expends.
(c) The type of energy it takes to make the machine work.
(d) The conservation of energy.

5. What happens if the force of upthrust is equal to the weight of an object in water?
(a) The object sinks.
(b) The object projects out of the water.
(c) The object moves across the surface of the water.
(d) The object floats.

Short Answer Questions

1. The rack and pinion is an example of ______________.

2. What is the action of something burning?

3. What is a substance that contains only one type of atom?

4. What is the density of salt water compared to fresh water?

5. What does increasing heat do to molecules?

(see the answer key)

This section contains 258 words (approx. 1 page at 300 words per page) View a FREE sample