Space And Beyond

Question 1

What is galileos telescope

Answer 1

A refracting telescope with 2 lens. Objective lens produces image while eyepeice lens magnifies it

Question 2

What is a hubble space telescope

Answer 2

Large curved mirrors that use the reflection of light to take images of objects. Curved mirror focuses light while a flat mirror reflects this into the eyepeice.

Question 3

What is a kepler space telescope

Answer 3

Reflecting telescope with a 95 megapixel camera attached. Looks at smae part of the sky at all times

Question 4

What is galileos telescope used for?

Answer 4

To observe distant objects such as the moons of jupiter

Question 5

What is the hubble space telescope used for?

Answer 5

To take images of objects in our solar system and of exoplanets

Question 6

What is the kepler space telescope used for?

Answer 6

To find planets in other solar systems that may support life. Helps to find size of planets.

Question 7

Risks of the space program

Answer 7

One way trip, expensive, long term effects on astronaut, current technologies not safe

Question 8

Benefits of the space program

Answer 8

Find new discoveries and materials, planet b, imperialism/ raises moral

Question 9

PositivE Uses of radioactive material

Answer 9

Cure cancer, diagnose illnesses, extend shelf life of produce

Question 10

What is radiation

Answer 10

The particles or waves emitted by radioactive substances

Question 11

What is radioactive decay?

Answer 11

In a radioactive atom, the nucleus is unstable so emits particles or waves to for. A more stable atom

Question 12

Properies og alpha particles

Answer 12

Made of 2 nuetrons and 2 protons, + 2 electric charge, relative atomic mass of 4, stopped by paper or a few cm of air, strongly ionising

Question 13

Properties of beta particles

Answer 13

Made of a high energy electron, electric charge of -1, relative atomic mass of 1/1860, stopped by a few mm of aluminium, weakly ionising

Question 14

Peoperties of gamma waves

Answer 14

An electromagnetic wave, electric charge and atomic mass of 0, stopped by several cm of lead or metres of concrete, very weakly ionising

Question 15

What is an ion

Answer 15

A charge atom

Question 16

Safety precautions of radiation

Answer 16

Exposure times short as possible, store in sheilded containers, wear protective clothing, monitor, use tongs to handle

Question 17

What is half life

Answer 17

The half life of a radioactive material is the time it takes half the atoms in a sample to decay

Question 18

How does gps work

Answer 18

Gps receiver detects signals from 3 staellites, each satellite works out the time for the signal to reavh the device so they can calculate distanc, each satellite works out possible locations, position of device= common possibke position, 4th satellite checks

Question 19

How doradio waves carry a signal from a radiostation to a radio

Answer 19

Sound is converted into an electrical aignal by a microphone of 1s and 0s, digital singal added to carrier wave by transmitter, receiver turns frequency to pick up signal and decode it back into sound.

Question 20

How does radar find distance

Answer 20

Measures time it takes radi wave to reflect from an object

Question 21

When was the big bang

Answer 21

13.7 billion years ago

Question 22

Nuclei of what atoms were formed 3 minutes after the big bang

Answer 22

Hydrogen, helium and lithium

Question 23

Why couldn’t atoms form after the big bang?

Answer 23

It was too hot for electrons to form

Question 24

What is cosmic microwave background radiation

Answer 24

The first radiation in the universe when the first atoms were for wd 400,000 years after the big bang

Question 25

When was our solar system formed

Answer 25

9 billion years after the big bang

Question 26

What is the activity of a radioactive source?

Answer 26

The number of unstable nuclei that decay every second

Question 27

What happens to the activity as more and more unstable atoms decay

Answer 27

Less unstable atoms and lower activity