Lights!
White light is actually a mixture of what?
different colors
How do light and sound travel?
As waves
What is something that decreases the force needed to move an object?
simple machine
When we jump into the air, what makes us come back down instead of float away?
Gravity
List an example of each:
Something transparent
Something translucent
Something opaque
Answers will vary. Teacher will judge.
The following items are ________.
(translucent, transparent, or opaque)
desk, tree branch, ruler
opaque
How is sound produced?
When something vibrates and sends the sound waves out.
True or false:
a seesaw is a type of wedge.
If this is false, what is the truth?
It is a lever.
Our gravity is pulling objects to the center of the what?
Earth
How does an inclined plane help with objects?
It increases the distance that an object moves.
The following items are ________.
(translucent, transparent, or opaque)
window, glass jar, ziplock baggie
transparent
If you shine a light through a mirror, it will _______ (reflect or refract?). I know this because the light will _________ (bounce back or bend?) in the mirror.
reflect
bounce back
When we use carts at the grocery store, we use them to make it easier to carry around our groceries. What type of simple machine is a cart?
Wheel and axel
When two objects rub together, it causes what?
Friction
What is a tool that a woodcutter would use, and what type of simple machine is it?
An axe. It is a wedge.
The following items are ________.
(translucent, transparent, or opaque)
sunglasses, lamp shade, wax paper
translucent
If you shine a light through water, it will _______ (reflect or refract?). I know this because the light will _________ (bounce back or bend?) in the water.
refract
bend
There is a simple machine used to close Stanley Cups. What is it, and how is it used?
A screw to put the lid on.
True or false: when one force is stronger than another, it means that they are balanced forces.
If it is false, what is the truth?
false.
They are unbalanced forces.
What can you shine a white light through to see different colors?
a prism
True or false:
to reflect means to bend.
If it is false, what is the truth?
false.
to reflect means to bounce back.
If you put a ruler on the edge of a desk, what are some ways to change the sound it makes when you lift it and let it go?
Answers include:
Move it farther out
Movie it closer
Hit it harder
Hit it softer
List six different types of simple machines.
Pulley
Wheel and Axel
Screw
Lever
Inclined Plane
Wedge
You and your sibling are in an argument, and you decide to go to your room to be alone for a minute. Your sibling does not want to end the argument. You try to close your bedroom door, but your sibling is there trying to keep it open. Give an explanation for why the door is not moving.
You and your sibling have equal strength, so it is putting the same amount of force on both sides of the door.
Give an example of a pulley.
Answers will vary.
Must have something to do with a string around a wheel that is used to pull something up. (example: pulling up a flag on a flagpole)