The standard model

1

By how many orders of magnitude is a whale (length approx. 20 m) larger than a fly (length 2 cm)?

2

A carbon nucleus has a diameter of 5 \times 10^{-15}m and a lump of coal has a diameter of 5cm. By how many orders of magnitude are they different in size?

3

What is the name of the group of particles which make up all matter?

4

What is the name given to the six types of matter particles including electrons which can exist on their own?

5

How many quarks are needed to make up a proton or neutron?

6

What is the name given to the group of particles that mediate forces?

7

What are the four fundamental forces of nature?

8

What is the strong force responsible for?

9

Complete the sentence.

In beta decay the weak force converts...

10

What is a positron?