Nuclear Fission

Question 1

Nuclear power stations usually use u…………… as fuel

Answer 1

Uranium 235

Question 2

Nuclear power stations sometimes use the fuel

Answer 2

Plutonium 239

Question 3

For nuclear fission to happen a slow moving …………… must be absorbed by a uranium or plutonium nucleus

Answer 3

Neutron

Question 4

Where must a slow moving neutron be absorbed for the atom to split

Answer 4

Nucleus of a plutonium or uranium atom

Question 5

How many neutrons are produced each collision

Answer 5

2 or 3 neutrons

Question 6

A …………… reaction takes place in nuclear fission

Answer 6

Chain reaction

Question 7

The chain reaction has to be controlled otherwise the reactor would what

Answer 7

would overheat

Question 8

………………………… absorb neutrons to slow down the reaction

Answer 8

Control rods

Question 9

The control rods can be moved in and out to

Answer 9

Absorb more or less neutrons

Question 10

What is formed when a big atom is split

Answer 10

Two smaller nucleus

Question 11

Two small nucleuses from a big atom splitting are ………………………… because they have the wrong number of neutrons

Answer 11

Radioactive

Question 12

Chemical reactions release a …………… Amount of energy compared to nuclear power

Answer 12

Tiny

Question 13

Low level waste is …………… to the body

Answer 13

Unharmfull

Question 14

Intermediate level waste is put into…………. Then into ……………

Answer 14

Concrete blocks and then into steal canisters

Question 15

High level waste is cooled for

Answer 15

50 years

Question 16

High level waste is sealed in

Answer 16

Glass then steel containers

Question 17

Nuclear fuel is ……………. But the overall cost of nuclear power is ……………

Answer 17

Cheap

Very expensive