Lesson 1
Lesson 2
Lesson 3
True or False
Essays
100
More friction is caused by rubbing between two objects that are ___________. a. hard b. soft c. smooth d. rough
What is rough?
100
Earth's ________ pulls objects toward the center of the Earth.
What is gravity?
100
Parts of animals' bodies that work as simple machines are __________. a. eyes and noses b. whiskers and scales c. feathers and fur d. claws and teeth
What is claws and teeth?
100
When smooth objects rub together, there is more friction than when rough objects rub together.
What is false?
100
Find the incorrect information. Rubbing my hands together when they are dry causes friction and gravity because dry hands are a rough surface. Rubbing them together when they are covered with soap causes more friction because their surfaces are smooth and slippery. There is more friction but not as much heat.
What is gravity-heat less friction
200
If less force is applied, an object will move ________. a. faster b. higher c. slower d. at a steady speed
What is slower?
200
The _______ of a magnet are found at the magnet's ends.
What is poles?
200
A lever is a simple machine made of a ______. a. wheel and axle b. bar or board c. two inclined planes d. wheel with jagged edges
What is bar or board?
200
If there was no gravity, things not tied down would float.
What is true?
200
Find the incorrect information. A car is not a simple machine because it is made up of few moving parts. A car has simple machines in it.
What is few moving parts? A car is made up of many moving parts.
300
Friction makes objects __________. a. speed up b. slow down c. slow down or stop d. speed up and overheat
What is slow down or stop?
300
The force of magnetism is _______. a. pushing only b. pulling only c. pushing and pulling
What is pushing and pulling?
300
The amount of work done depends on the ______. a. force and distance b. force and gravity c. gravity and magnetism d. magnetism and distance
What is force and distance?
300
A simple machine made of a wheel and a rope is a wheel and axle.
What is false?
400
A bicycle being pedaled moves because of ______. a. wheels b. force c. gravity d. magnetism
What is force?
400
The _________ of an object tells how much gravity is pulling on it.
What is weight?
400
A screw is used to _______. a. take objects apart b. turn objects in place c. push objects up a hill d. hold objects together.
What is hold objects together?
400
Which word makes the statement true? ________ is done when a force moves an object over a distance. a. Friction b. Gravity c. Work
What is work?
500
Magnetism causes magnets to pull on certain _______ such as iron.
What is metals?
500
A _____ _______ has few or no moving parts.
What is a simple machine?
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