|Name: _________________________||Period: ___________________|
This test consists of 15 multiple choice questions and 5 short answer questions.
Multiple Choice Questions
1. 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 forces the object to reduce the effects of gravity.
(d) It doesn't ; the wedge moves the plane itself to raise an object.
2. Why is cold water denser than warm water?
(a) Cold water's molecules move around more loosely.
(b) Warm water has a greater ability to absorb force.
(c) Cold water has a greater ability to coalesce.
(d) Warm water's molecules move around more loosely.
3. What is convection?
(a) When heat causes wind.
(b) The way a molecule radiates heat.
(c) When heat increases velocity.
(d) Heat moving from a liquid or gas molecule to another.
4. What is one example the author uses of a wedge?
(a) An escalator.
(b) A type of door stop.
(c) A ship's ramp.
(d) A block and tackle system.
5. What are tanks that take in water to increase the density of the craft?
6. What is the most common form of inclined plane found in machines?
(a) The rocker.
(b) The rods.
(c) The wedge.
(d) The pully.
7. What causes expansion?
8. What is electricity flowing through a wire?
9. What does a driving force initiate?
(a) Electron activity.
10. What are the effects of electricity?
(a) It depends on the amperage.
(b) Only light.
(c) Only magnetism.
(d) Heat, light, and magnetism.
11. How does a rocket engine power the craft?
(a) By the turning of a propeller.
(b) By nuclear fusion.
(c) By the combustion of one propellant.
(d) By the combustion of two propellants.
12. What does the inclined plane do?
(a) Decreases effort.
(b) Increases effort.
(c) Decreases gravitational force.
(d) Extends the distance to a rise.
13. What is the main idea in Part 2 of the book?
(a) The way force can be exerted to change atomic structure.
(b) The way atoms can be made more dense.
(c) The way work can cause energy to dissipate.
(d) Exploring the bonds of attraction and the movement of molecules to and from each other.
14. What imparts movement into the air or water around them on a ship?
15. What happens when an object is placed in water?
(a) The water is repelled by the electrical force of the object.
(b) The object absorbs the water's atoms.
(c) The water molecules push against the object.
(d) The object sinks.
Short Answer Questions
1. What occurs when molecules begin vibrating in a solid, then speed up their vibration when heated?
2. Upon what does the amount of upthrust of an object in water depend?
3. The rack and pinion is an example of ______________.
4. What is the principle behind the action of any machine?
5. What is the principle that states energy is neither created nor destroyed?
This section contains 531 words
(approx. 2 pages at 300 words per page)