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WorksheetsScience 6 - Quarter 3 Pre-assessment
Total questions: 25
Worksheet time: 13mins
A child slides down a playground slide and feels the warmth on their hands as they touch the slide. Which type of friction is primarily involved in this situation?
Rolling friction
Sliding friction
Static friction
Fluid friction
Why do ball bearings in a wheel reduce friction?
They change static friction to fluid friction.
They eliminate sliding friction by allowing rolling friction.
They increase the surface area in contact with the axle.
They convert friction into heat energy.
Which scenario demonstrates fluid friction?
A car braking suddenly on a dry road
A boat moving through water
A box pushed across the floor
A rolling bowling ball
A heavy box stays in place even when a person pushes it. What type of friction is responsible for this?
Sliding friction
Rolling friction
Static friction
Fluid friction
Which action demonstrates reducing sliding friction?
Applying grease to a bicycle chain
Using sandpaper on a wooden surface
Tightening the screws on a machine
Adding more weight to a sled
Why do astronauts on the Moon weigh less than they do on Earth?
The Moon has no gravity.
The gravitational pull of the Moon is weaker than that of Earth.
The Moon’s surface is smoother than Earth’s.
The distance between the Moon and the Sun affects weight.
If a ball is dropped and another ball is thrown horizontally from the same height, which will hit the ground first? Ignore air resistance.
The balls will not hit the ground
Which of the following scenarios demonstrates the effect of gravity?
A kite floating in the air
A leaf falling to the ground
A feather suspended in water
A helium balloon rising into the sky
Which of the following best explains why objects fall towards the Earth?
Air pushes objects down.
The Earth’s magnetic field attracts objects.
The Earth’s gravity pulls objects towards its center.
Objects naturally seek lower elevations.
If the mass of an object increases, how does gravity between it and the Earth change?
Gravity decreases.
Gravity remains constant.
Gravity increases.
Gravity is unaffected by mass.
Which simple machine is used in a seesaw?
Pulley
Lever
Inclined plane
Screw
Which tool combines an inclined plane and a wedge?
ballpen
Screwdriver
Knife
plywood
How does a fixed pulley make work easier?
A carpenter uses a screw to attach two pieces of wood. What simple machine is the screw an example of?
In which situation is a wedge most effective?
Splitting a log
Pulling a bucket of water
Moving a cart up a ramp
Lifting a load using a lever
Which form of energy is stored in food?
Mechanical energy
Radiant energy
Chemical energy
Electrical energy
What type of energy is produced by vibrating objects?
Sound energy
Thermal energy
Radiant energy
Chemical energy
A running car engine converts chemical energy into which forms of energy?
Thermal and sound energy
Mechanical and radiant energy
Electrical and thermal energy
Chemical and sound energy
What form of energy does a wind turbine generate from moving air?
Thermal energy
Mechanical energy
Chemical energy
Radiant energy
Which of the following uses radiant energy?
A flashlight
A refrigerator
A windmill
A rolling toy car
Which energy transformation occurs in a solar panel?
Radiant to chemical energy
Radiant to electrical energy
Chemical to thermal energy
Mechanical to radiant energy
What type of energy transformation occurs when a battery-powered fan is turned on?
Chemical to mechanical energy
Electrical to chemical energy
Thermal to radiant energy
Sound to electrical energy
What happens to energy in a light bulb?
Electrical energy is converted to radiant and thermal energy.
Mechanical energy is converted to electrical energy.
Thermal energy is converted to radiant and chemical energy.
Radiant energy is converted to sound and mechanical energy.
Which scenario illustrates chemical energy being converted to mechanical energy?
A person pedaling a bicycle
A car using fuel to move
A wind turbine generating electricity
A microwave heating food
In a hydroelectric power plant, water is used to generate electricity. Which energy transformations take place?
Thermal to chemical to electrical energy
Mechanical to radiant energy
mechanical to electrical energy
Chemical to radiant to thermal energy
