Revision

Shooting an arrow from a bow converts ______ into kinetic energy.

• Elastic Potential Energy

• Chemical Energy

• Nuclear Energy

• Sound Energy

A microphone converts ______ energy into ______ energy.

• Sound, Electrical

• Sound, Kinetic

• Kinetic, Sound

• Electrical, Sound

What is kinetic energy?

• The energy stored in an object due to its position.

• Ability to do work.

• The energy of motion.

• The energy stored in an object due to its shape.

Where is the potential energy the greatest?

• At a

• At b

• At c

• At d

How is gravity affected by the mass of an object?

• The larger the mass of the object, the smaller the gravity.

• Gravity is not affected by the mass of objects, whether large or small.

• Small objects have no gravity.

• The larger the mass of the object, the greater the gravity.

______ is an example of a non-contact force.

• Gravity

• Friction

• Air resistance

• Upthrust

The measuring unit of weight is ______.

• Meter

• Newton

• Litter

• Centimeter

Air resistance pushes against falling objects and ______.

• Speeds them up

• Keeps them afloat

• Slows them down

• Spins them

An object that does not vibrate cannot produce ______.

• Electricity

• Sound

• Light

• Heat

______ is a real-life application of how to use the echo of the sound to help the submarines navigate.

• X-ray scanning

• Thermal imaging

• Sonar

• Water purification