Section 3 - Radioactivity and Astronomy

Question 1

What is the solar system?

Answer 1

all the stuff that orbits our sun

Question 2

What is included in the solar system?

Answer 2

Planets, Dwarf planets, Moons, Artificial satellites, Asteroids, Comets

Question 3

Planets

Answer 3

Large objects that orbit a star.

Question 4

What are the 8 planets in our solar system?

Answer 4

(from the sun, outwards)
Mercury, Venus, Earth, Mars, Jupiter, Saturn,Uranus, Neptune

Question 5

Dwarf Planets

Answer 5

Planet like objects that arent large enough to be planets.

Question 6

Moons

Answer 6

Orbit planets wiht almost circular orbits, natural sattelites

Question 7

Asteroids

Answer 7

Lumps of rock and metals that orbit the sun, they are usually found in the asteroid belt

Question 8

Comet

Answer 8

Lumps of ice and dust that orbit the sun. highly eliptical orbits

Question 9

What is alpha radiation

Answer 9

Alpha radiation is when an alpha particle is emmitted fromthe nucleus (2 protons and 2 neutrons)

Question 10

How far do alpha particles travel?

Answer 10

Few cm in air and stopped by thin paper because they are strongly ionising

Question 12

How are B- particles created

Answer 12

when a neuton decays into an electron and a proton. That electron is then thrown out of the nucleus

Question 13

How far do B- particles travel?

Answer 13

Few meters and absorbed by a sheet of aluminium, moderately ionising

Question 14

How are gamma rays created?

Answer 14

A neucleus decaying and releasing energy in form of gamma rays

Question 15

How far do gamma rays go

Answer 15

A very long distance, can penetrade deeply into materials, weakly ionsiing. Cna be stopped by lead or meteres fo cncrete