Lever/Pulley
What is the fixed point on a lever called?
fulcrum
What two parts make up a wheel and axle?
A large wheel attached to a smaller rod (axle).
What is another name for an inclined plane?
Ramp
What is a producer in a food chain?
An organism (like a plant) that makes its own food using sunlight.
The capital city of France
Paris
If you move the fulcrum closer to the load, does lifting the load become easier or harder?
Easier (it takes less effort).
A screw is an inclined plane wrapped around what?
cylinder
A wedge is made of how many inclined planes?
2
What force pulls objects toward Earth?
gravity
The largest planet in our solar system
Jupiter
What class of lever is a seesaw?
First-class lever.
What is the inclined plane called around the base of the screw
thread
What is the main job of a wedge?
To split, cut, or push objects apart.
What do you need to make a complete circuit?
A power source (like a battery), wires, and a load (like a light bulb) connected in a closed loop.
What ocean is the largest on Earth?
Pacific ocean
two or more pulleys working together is called
a compound pulley
In a wheel and axle, which part is usually bigger?
a) The axle
b) The wheel
c) They are the same size
The wheel
If you make a ramp steeper, does it take more or less force to push something up?
More force.
What type of rock forms from cooled lava or magma?
Igneous
What is the fastest land animal?
cheetah
Example of a third class lever
Broom (when sweeping)
Fulcrum: Top hand
Effort: Bottom hand (in the middle)
Load: Broom head
Fishing rod
Fulcrum: Your hand at the base
Effort: Your other hand in the middle
Load: The fish
Baseball bat
Fulcrum: Top hand
Effort: Bottom hand
Load: The ball
Tweezers
Fulcrum: Connected end
Effort: Middle where you squeeze
Load: The object being picked up
Human arm
Fulcrum: Elbow
Effort: Bicep muscle
Load: Object in your hand
Why is turning a screwdriver easier than pushing a nail straight in?
The screw’s threads help it move into the material gradually, using less force.
How does a wedge make work easier?
It concentrates force onto a small edge to split or cut materials.
What is the name of the galaxy that contains Earth?
The milky way
What is the smallest planet in our solar system?
mercury