Space And Beyond

Question 1

Name the 3 ideas of how the earth was supported many many thousand years ago

Answer 1

1. People in thailand thought that solar eclipses happened when a god called rahu swallowed the sun
2. People in india thought that a flat earth was supported by 12 pillars
3. There was another idea,that the earth was supported in the back of a turtle

Question 2

Who made the geocentric model

Answer 2

Aristole

Question 3

Who made the heliocentric model

Answer 3

Aristarchus

Question 4

What is the geocentric model

Answer 4

It is when our moon,the sun and the other planets orbit around the earth

Question 5

What is the retrograde motion

Answer 5

Planets appeared to go backwards

Question 6

What is the heliocentric model?

Answer 6

It is when all the planets orbit around the sun.(ours today)

Question 7

Who invented telescopes?

Answer 7

Galileo Galilei

Question 8

When did the big bang happen?

Answer 8

14 billions years ago

Question 9

What is the big bang?

Answer 9

The Big Bang is the Expansion of space that scientists believe is how the Universe started. The Universe has been Increasing are moving Apart in size ever since. The Big Bang theory explains why galaxies and why the galaxies that are further away are moving Faster

Question 10

When was our solar system formed?

Answer 10

5 billion years ago

Question 11

What is a geostationary orbit

Answer 11

staying over the same position on the earth all the time

Question 12

Low earth orbit? (LEO)

Answer 12

Lower orbits
There are lots of satellites, such as the International Space Station, in low Earth orbit (LEO). This is an orbit below 1000 km from Earth.

Question 13

Polar orbit?

Answer 13

Some LEO satellites go over the North Pole and the South Pole in a polar orbit. Polar orbit satellites are useful for mapping. You need a satellite in LEO if you want to see the whole of the Earth’s surface.

Question 14

Describe the benifits of a space mission

Answer 14

Any named example of technology invented for the space programme used in everyday life, for example, computers, liquid-cooled suits, shock-absorbing materials, baby-milk formulae, computer programs, and water filters
Encouraging curiosity about our Universe
Encouraging the study of sciences at school and beyond

Question 15

Describe the risks of space missions

Answer 15

injury to astronaut
damage to orbiting satellites
pollution of environment
solar flares damaging spacecraft
damage to spacecraft on re-entry to Earth

Question 16

What is the timescale for the universe.

Answer 16

14 billion years ago – the Big Bang
13.85 billion years ago – stars began to form
From 11 billion years ago onwards – galaxies started to form
5 billion years ago – our Solar System formed
4 billion years ago – life on Earth began
Between 200 million and 65 million years ago – dinosaurs on Earth From 0.5 million years ago to now – humans on Earth

Question 17

Name the 2 types of telescopes

Answer 17

Refracting telescopes
Reflecting telescopes

Question 18

What is a refracting telescope

Answer 18

The telescope uses 2 lens, the objective lens refracts the light into an image and light goes through an eye piece lens

Question 19

What is a reflecting telescope

Answer 19

It uses a concave mirror and reflects light onto a flat mirror reflecting into an eyepiece lens where we can see the image

Question 20

Label the reflecting and refracting telescopes

Answer 20

Kerboodle —> activate 3 —> detecting planets pg. 136.
Remember to label it.

Question 21

How to detect alien life?

Answer 21

Computers can be used to estimate theHabitablezone
around our Sun. This is the region where a planet would be at a suitable Temperature for Liquid water to exist. Reflected Line spectra can also be used. This is light _ from planets that creates a unique series of lines on a spectrum of light, Black similar to a Bar code lines appear on the line spectrum when . Frequencies are missing (because these are Absorbed Atmosphere by the substances present in the planet’s Known ). This can be compared with line spectra of substances required forife, for example, Water .. Telescopes can also be used to detect_. waves and other Electromagnetic waves emitted from space. This is the basic idea behind SETI ( Search for extra terrestrial intelligence ). Extremely powerful telescopes may be able to see Earth directly.

Question 22

Give the order in which the planets are from the sun

Answer 22

Mercury,venus,earth,mars,jupiter,saturn,uranus,neptune

Question 23

What is the doppler effect? (Use slides for more info)

Answer 23

When a distant object moves away from the Earth, the light appears more red

Question 24

What is a low earth orbit (LEO) and give examples of satalities that use it

Answer 24

A satellite which orbits at an altitude of between 200 and 2000km.
Satellites in low earth orbits:
● Communications
● Imaging
● Weather
● Monitoring

Question 25

Name the life cycle of a star that ate the same size as our sun (in order)

Answer 25

1. Protostar
2. Main seauence star
3. Red giant
4. White dwarf
5. Black dwarf

Question 26

Label the each of the stages in the life cycle of a star that is much bigger than the sun (in order).

Answer 26

1. Protostar
2. Main sequence star
3. Red super giant
4. Supernova
5. Neutron star Or black hole

Question 27

The shift in the spectrum of light from the distant galaxy provides
evidence for the expansion of the…?

Answer 27

Universe

Question 28

An astronomer observes light from a distant galaxy. As the galaxy moves away from us, the spectrum of the light is…?

Answer 28

Red-shifted

Question 29

What is red-shift?

Answer 29

Provides evidences for the expansion of the universe, also peovides evidence for the big bang