1. The force that pulls objects towards the Earth is called __________.

2. Gravity is a contact / non-contact force.

3. The force of gravity acting on an object is its __________.

4. A dropped ball falls towards the ground because Earth’s gravity pulls it __________.

5. If an astronaut travels farther from Earth, Earth’s pull on them becomes weaker / stronger.

1. A parachute opens as a skydiver falls. What does it increase to slow the fall? AgravityBair resistanceCfrictionDwater resistance

2. Which object is moving through water? Aa kite in the windBa swimmerCa rolling bookDa falling leaf

3. A streamlined shape helps a boat move through water by reducing… AgravityBits massCwater resistanceDits weight

4. Which force acts against a cyclist moving through the air? Aair resistanceBwater resistanceCmagnetismDgravity

5. A wide parachute falls more slowly than a small one because it has… Aless air resistanceBmore air resistanceCless gravityDmore mass

Word bank: rough, smooth, grip

1. Which surface usually creates more friction: a rough surface or a smooth surface?

2. A bicycle’s brakes press against a wheel. The friction helps the bicycle __________.

3. Shoes with patterned soles help a person get a better __________ on the ground.

4. A toy car rolls more easily across a smooth floor than a rough carpet. Which surface creates less friction?

5. Name one way friction is useful in everyday life.

1. What is the turning point of a lever called? AloadBpivotCropeDwheel

2. Which object is an example of a lever? AseesawBballoonCparachuteDsail

3. What usually runs over a pulley wheel to help lift a load? Aa springBa ropeCa rulerDa magnet

4. What is one job a pulley can help with? Amaking an object lighterBlifting a loadCstopping gravityDmaking water flow uphill

5. Name one everyday object or place where a pulley might be used.

1. What must the teeth of two meshing gears do? Afit togetherBfloat apartCrub on the floorDpoint upwards

2. If one gear turns clockwise, which way does a gear meshing directly with it turn? AclockwiseBanticlockwiseCit does not turnDboth ways at once

3. A small gear turns a larger gear. Which gear makes fewer turns in the same time? Athe small gearBthe large gearCboth make no turnsDboth always make the same number

4. Name one object or machine that uses gears.

5. In a bicycle, gears help the rider change how easily the pedals turn. True or false?

Word bank: gravity, air resistance, water resistance, friction, lever, pulley, gears

1. A book rests on a desk, held towards Earth by a non-contact force. Which force is this?

2. A swimmer feels a force opposing their movement through the pool. Name it.

3. A person uses a rope running over a wheel to raise a flag. Name the mechanism.

4. Two toothed wheels turn together inside a machine. Name the mechanism.

5. A cyclist’s tyres grip the road instead of sliding. Which force helps provide this grip?