chap 10

Question 1

Energy

Answer 1

how active you feel

Question 2

Law of Conservation of

Energy

Answer 2

the amount of energy in the universe is always the same.

Question 3

Potential energy

Answer 3

stored energy that, when released, is converted
to other forms such as kinetic, sound, heat or
light energy

Question 4

Gravitational

Answer 4

(potential energy of an
object elevated above the
ground) e.g. high jump

Question 5

Elastic

Answer 5

(energy stored by an elastic
object that is stretched,
such as a spring or rubber
band) e.g. trampoline

Question 6

Kinetic

Answer 6

(energy possessed by

objects that are moving) e.g. race car

Question 7

Heat

Answer 7

(energy that causes objects

to gain temperature) e.g. heater

Question 8

Light

Answer 8

(energy that may be
released, for example,
when an object is hot or by
a nuclear reaction in a star) e.g. lightbulb

Question 9

Sound

Answer 9

(energy carried by the air
in a room and detected by
the ear) e.g. music

Question 10

Luminous and Non-luminous objects

Answer 10

A luminous object is an object that gives off light. A non-luminous object is an object that uses the light from luminous objects and reflects it to be seen.

Question 11

Radio waves

Answer 11

Used to communicate over long distances through radio, television, mobile phones and wi-fi.

Question 12

Infra-red radiation

Answer 12

Used to control technology with a remote.

Question 13

Ultraviolet radiation

Answer 13

Used by humans to help the body produce vitamin D, however too much exposure can cause sunburns.

Question 14

Gamma rays

Answer 14

Used to kill cancer cells and find weaknesses in metals