MACHINES WITH ONE OR A FEW NUMBER OR PARTS THAT HELP US MOVE OR LIFT THINGS
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15
What are complex machines?
MACHINES MADE BY MANY PARTS THAT NEED FUEL OR ELECTRICITY TO WORK
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15
The most common magnetic material
IRON
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heart
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fairy
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gift
Win 25 points!
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baam
Lose 25 points!
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What simple machine do we use to lift heavy objects easier?
A LEVER
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15
Some forces can act over a distance, and others canonly act by contact. Which type of force can act only when two objects touch each other? A: Gravitational / B: Frictional / C: Electrostatic
B - FRICTIONAL
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Which one of these would you use to remove a box from a truck? A: a lever / B: an inclined plane / C: a wheel and an axle / D: a pulley
B - AN INCLINED PLANE
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15
Name everyday activities where we use friction
WALKING, RUNNING, JOGGING, DRIVING A CAR, RIDING A BIKE....
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15
TRUE OR FALSE - The Earth has a stronger force of gravity than the moon
TRUE
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Name two simple machines that helped Egyptians to built the pyramids
WHEELS, LEVERS, PULLEYS, INCLINED PLANES
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monster
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fairy
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25
shark
Other team loses 20 points!
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lifesaver
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What are forces?
Something that can make an object start moving, stop moving, change shape or break
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Gravity is this type of force
PULLING
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monster
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rocket
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shark
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banana
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15
Does gravity change?
NO, IT REMAINS THE SAME
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15
Which has more friction: rough or smooth surfaces?