Light
Sound
Force & Motion
Simple Machines
Mixed Review
100
True or False: Lenses bend light
True
100
How is sound produced?
Vibrations
100
What is a force?
A push or pull
100
Frank is cutting logs for a fire. Which type of simple machine is best to use?
Wedge
100
Someone wants to move a heavy box into the back of a moving truck. Which simple machine would be best to use?
Inclined Plane
200
What do mirrors do to light?
They reflect light
200
Sound travels FASTEST through what material?
Solids
200
True or False: Force moves a heavier object much easier than a light object.
False
200
What simple machine can hold 2 objects together?
Screw
200
How are light and sound alike?
Both are forms of energy that travel as waves.
300
What do we call the 3 types of objects that interact with light?
Opaque, Transparent, and Translucent
300
Which of these happens when a string on a violin gets plucked?
The string produces sound waves.
300
What does gravity do?
It pulls objects downwards
300
How do simple machines affect work?
They change the direction or the amount of force needed for work.
They make work easier.
300
How is a mirror different than a prism?
A mirror reflects (bounces) light and a prism refracts (bounces) light.
400
What happens to light when it hits a prism?
It bends the light, which separates the colors
400
____________ refers to how loud a sound is.
Volume
400
If you throw a ball, and someone hits it with a bat with a greater force, what happens to the ball?
It will change direction
400
What simple machine uses a straight beam and a fulcrum?
Lever
400
Is a car stopped at a stop sign a balanced or unbalanced force?
A balanced force
500
A concave lens bends light _________ while a convex lens bends light ______.
Outwards, Inwards
500
____________ refers to how high or low a sound is.
Pitch
500
What is the difference between balanced and unbalanced forces?
Balanced forces have no changes in motion
Unbalanced forces have changes in motion
500
The picture shows Nathan moving a piano. The piano required too much force to move at first, but then Nathan added wheels to the legs and the piano was much easier to move. How did adding wheels make the heavy piano easier to move?
The wheels helped to reduce the force of friction on the piano.
500
Give a example of a transparent, translucent, and opaque material.
Answers will vary