Speed
Force
Friction
Gravity, Weight, and Mass
Magnetism
100
What is speed?
The distance an object travels per unit of time?
100
What are the two common words for a force?
Push and pull.
100
What are the four kinds of friction?
Static, sliding, rolling, and fluid.
100
What is gravity?
The attractive force between two objects?
100
Is a magnet an attractive or repulsive force?
It is both.
200
What two things are needed to find speed?
Distance traveled and time it took.
200
What is the unit for measuring force?
Newtons.
200
What is friction?
The force two surfaces exert on each other.
200
What does mass measure?
The amount of matter in an object.
200
Which poles attract to each other?
North to South, South to North.
300
If a runner goes 350 meters in 5 seconds, what is his speed?
70 meters/second
300
How do we describe a force?
Strength and direction.
300
What does the strength of the force of friction depend on?
How hard the surfaces are pushing on each other and the type of surface.
300
What does weight measure?
The pull of gravity on an object.
300
Where is a magnet the strongest?
The North and South poles.
400
An airplane traveled for 7 hours and traveled at a speed of 6 kilometers per hour. How far did it travel?
42 kilometers
400
What are the two ways force a can occur?
Physical contact and at a distance.
400
Give an example of sliding friction and static friction.
Answers will vary.
400
What are the most appropriate ways to measure mass and weight?
Mass - grams, kilograms, etc. Weight - Newtons.
400
What phenomenon is caused by Earth's magnetic field that can be seen in northern areas like Alaska and Canada?
The Northern lights.
500
If your last class was 270 meters away and your average speed was 3 meters per second, how long did it take you to get to your next class?
90 seconds
500
What are the three things that can happen when multiple forces act upon an object?
Combine, cancel, or subtract.
500
Give an example of fluid friction and an example of rolling friction?
Answers will vary.
500
Name two differences between mass and weight.
Answers will vary.
500
What causes Earth's magnetic field?
Electrical charges from the molten iron in Earth's core.
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