Simple Machines
This simple machine is a slanted surface that helps move objects up or down.
What is an inclined plane?
A machine made of two or more simple machines working together is called a…
What is a complex machine?
A mechanism is a part of a machine that helps it…
move or work.
Machines that produce smoke or pollution can have a ______ impact on the environment.
What is negative.
A crane uses this type of mechanism.
What is a pulley.
This simple machine has a wheel and a rope and is often used to lift heavy objects.
What is a pulley?
Name two complex machines.
Bicycle, shovel, scissors, etc.
Is a coat zipper linear or rotational motion?
Linear motion.
Name one example of a positive environmental impact of machines.
What is renewable energy.
A watch uses this type of mechanism.
What are gears?
Name two simple machines found in a wheelbarrow.
What are a lever and a wheel and axle?
Give one example of a complex machine used at school and name one simple machine in it.
Scissors –lever, wedge.
Explain the difference between linear and rotational motion.
Linear moves in a straight line; rotational moves in a circle.
Name one way machines can help people.
What are reduce effort, save time, increase safety, etc.
Explain how a pulley makes lifting easier.
It changes direction of force and/or reduces effort needed.
Which simple machine is used to split wood?
What is a wedge?
Name one simple machine found in scissors.
What is a lever or wedge.
What mechanism is commonly used in a bike to transfer motion from pedals to wheels?
What are a chain and gears.
Name one way machines can harm the environment.
What is pollution, noise, resource use, habitat destruction.
Gears change ______ and ______.
What are speed and direction.
Explain how a lever makes work easier.
It reduces the effort needed by changing direction.
Why is a bicycle considered a complex machine?
It is made of multiple simple machines working together.
If two gears touch, which direction do they spin?
What is opposite directions.
What are two machines that have a similar task but different environmental impacts?
What are car and bike, stairs and elevators, hand mixer and electric mixer, broom and vacuum, clothesline and dryer.
If a large gear turns a small gear, what happens to speed?
What is speed increases.