VOCAB 1
_______________ is the use of force.
What is WORK
A ___________ is a wheel with a rope, cord, or chain around it.
What is PULLEY
Why would a scientist say that riding a book is called "work"?
Because you need to push the pedals to move bike.
A jar has lid has threads. These threads help hold the lid tightly on the jar. Which simple machine is a jar lid?
A. lever
B. pulley
C. Screw
D. Wedge
What is C. a screw
A __________ ________ is something that makes work easier.
What is SIMPLE MACHINE
An _________ _______ is a plane that is slanted, so that one end is higher than the other.
What is INCLINED PLANE
Which job could you do with a pulley?
A. Pull a wagon up a hill
B. Split a log into two pieces.
C. Lift a bucket of nails up to the roof.
D. Pry a rock from the ground.
What is C - lift a bucket of nails up to the roof
Which two compound machines make a shovel?
A. lever and wedge
B. wedge and screw
C. fulcrum and lever
D. inclined plane and pulley
What is A. lever and wedge
A ______________ is a bar that pivots, or turns, on a fixed point.
What is LEVER.
A __________ is two inclined planes placed back to back.
What is WEDGE
Which every day item has a wheel - and - axle that makes work easier to do?
A. a doorknobB. a hatchet
C. scissors
D. A Seesaw
What is A, a doorknob
Screws have pointed tips. Which simple machine is the tip of the screw?
A. inclined plane
B. Lever
C. wedge
D. wheel - and - axle
What is C. wedge
The fixed point on a lever is called a ___________.
.
What is FULCRUM
A __________ is an inclined plane wrapped around a shaft or cylinder.
What is SCREW
Elisa and Sara are on a seesaw. Sara moves closer to the center of the seesaw. What should Elisa do to lift Sara more easily?
A. push down harder
B. bounce up and down
C. move closer to the fulcrum
D. Move away from the fulcrum
What is D. Move away from the fulcrum
A bicycle is a compound machine. What are two simple machines found in a bicycle?
A. wedge and screw
B. lever and wheel - and - axle
C. inclined plane and pulley
D. wheel - and - axle and inclined plane
What is B. Lever and Wheel - and - Axle
A ________ - ____ - _________ is made up of a while and an axle that are connected so that they turn together.
What is WHEEL - AND - AXLE
A ___________ ___________ is a machine made up of two or more simple machines.
What is COMPOUND MACHINE
Hondo used a screwdriver to open a can of paint. How is the screwdriver being used?
A. as a pulley that lifts the lid up
B. as a wheel - and - axle that opens the can by turning the screwdriver
C. as a lever that changes the direction of the force needed to open the lid
D. as a fulcrum that splits the lid from the can when pushed between them
What is C. as a lever that changes the direction of the force needed to open the lid
Cassie lives at the top of the hill. Which simple machine is the road to her house most like?
A. inclined planeB. pulley
C. screw
D. wedge
What is A. inclined plane