Physics Chapter 3

Question 1

Biofuel

Answer 1

any fuel taken from living or recently living materials, such as animal waste

Question 2

carbon-neutral

Answer 2

a biofuel from a living organism that takes in as much carbon dioxide from the atmosphere as is released when the
fuel is burned

Question 3

geothermal energy

Answer 3

energy released by radioactive substances deep within the Earth

Question 4

national grid

Answer 4

the network of cables and transformers used to transfer electricity from power stations to consumers (i.e., homes,
shops, offices, factories etc.)

Question 5

nuclear fuel

Answer 5

substance used in nuclear reactors that releases energy due to nuclear fission

Question 6

nucleus

Answer 6

tiny positively charged object composed of protons and neutrons at the centre of every atom

Question 7

reactor core

Answer 7

the thick steel vessel used to contain fuel rods, control rods and the moderator in a nuclear fission reactor

Question 8

renewable energy

Answer 8

energy from natural sources that is always being replenished so it never runs out

Question 9

Vector

Answer 9

a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.

Question 10

Scalar

Answer 10

having only magnitude, not direction.

Question 11

Displacement

Answer 11

the action of moving something from its place or position.

Question 12

Velocity

Answer 12

the speed of something in a given direction.