SCIENCE F2 CHAPTER 7

Energy is the ability to

• be safe

• do work

• be safe and do work

_________________________ is the energy obtain during a movement.

• Potential energy

• Kinetic energy

• Gravitational Potential energy

• Elastic Potential energy

Sound energy is transmitted through _____________________ of particles.

• radiation

• static movement

• vibration

A light bulb changes ________________________________ to ____________________________________ while it is turned on.

• heat energy, light energy

• electrical energy, heat energy

• electrical energy, light energy

• electrical energy, light energy and heat energy

A coconut is falling from a tree the changes in the energy is from________________________________________________

• gravitational potential energy to sound energy

• gravitational potential energy to sound energy and light energy

• gravitational potential energy to kinetic energy

• gravitational potential energy to sound energy and heat energy

When an object loses electrons the object is ____________________________ charged.

• electropositively

• positively

• negativley

• electronegatively

An object is charged or electrostatic charge occur through

• friction

• contact

• passing the flow of electron

• induction

What is the name of this device

• a gold leaf

• a metal disc

• a gold leaf and a metal disc

• an electroscope

A TV screen becomes dusty quickly because the ____________________ charges on the dust are attracted to the ___________________________ charges on the TV screen.

• positive , negative

• negative , positive and negative

• negative , positive

• negative and positive , negative

The flow of electrical charges are measured as

• current

• electrical current

• potential difference

• ampere