P1 - topic 1 - changing ideas about the solar system

Question 1

what is the geocentric model?

Answer 1

the idea that the sun, moon, planets and stars al orbited the Earth in perfect circles

Question 2

the geocentric models states that everything orbits the Earth in what?

Answer 2

perfect circles

Question 3

when was the geocentric model accepted till?

Answer 3

1500’s

Question 4

when did the geocentric model start to be replaced by the heliocentric model?

Answer 4

1600’s

Question 5

what does the heliocentric model state?

Answer 5

the Earth and planets all orbit the sun, which is at the centre of the universe

Question 6

when and who introduced the heliocentric model?

Answer 6

Copernicus in 1543

Question 7

why wasn’t Copernicus’ ideas about the universe popular at the time?

Answer 7

the model itself wasn’t condemned by the church

Question 8

what was one of the most convincing pieces of evidence for the heliocentric model?

Answer 8

Galileos observations of jupiters moons

Question 9

what were the stages of galileos discovery?

Answer 9

1) in 1610 Galileo was observing Jupiter using a tekescope
2) he saw 3 stars in a line near the planet
3) he looked again the next evening when he saw these stars had been moved in the wrong direction
4) after a week, a fourth star appeared
5) stars never moved away from Jupiter
6) he realised they weren’t stars, they were moons orbiting Jupiter

Question 10

how did the geocentric model get proven wrong?

Answer 10

Galileo discovered that there was four moons orbiting Jupiter so not everything was in orbit around the Earth

Question 11

what did ancient Greeks think about the solar system?

Answer 11

the earth was the centre of the universe

Question 12

what does the current model about the universe say?

Answer 12

the planets in our solar system orbit the sun elliptically

Question 13

what’s the difference between the current model and the heliocentric model?

Answer 13

the orbits are elliptical rather than circular

Question 14

why/how have the ideas about the universe changed?

Answer 14

technology has improved so the idea of the solar system and universe have changed e.g telescopes

Question 15

how do you discover things about the universe?

Answer 15

detect waves from objects in space

Question 16

why can we see planets?

Answer 16

they reflect sunlight

Question 17

what is example of objects in space detecting waves?

Answer 17

stars give out lots of visible light (why you can see them even when they are very far away)

Question 18

how did early astronomers make observations about the universe?

Answer 18

using the naked eye

Question 19

what was the only thing that the naked eye was useful for?

Answer 19

making the position of stars, comets and planets

Question 20

what were discovered by the naked eye?

Answer 20

stars
comets
planets

Question 21

what do telescopes do?

Answer 21

magnify an image, so distance objects can be seen in more detail and are at lager distances

Question 22

has telescopes discovered new objects?

Answer 22

yes

Question 23

what has telescopes helped us do?

Answer 23

learn more about the universe

Question 24

what kind of telescopes are expensive?

Answer 24

space

Question 25

photographs are taken using what to make it zoom in more?

Answer 25

telescopes

Question 26

why are photographs use instead of telescopes?

Answer 26

1) easier to monitor planets 2) easier to compare 3) provides E widened to share your discoveries 4) more accurate 5) saves time

Question 27

What does the current model say?

Answer 27

The planets in our solar system orbit the am but these orbits are actually elliptical rather than circular

Question 28

As technology has improved what has changed?

Answer 28

Our idea of the solar system and the universe has changed

Question 29

The invention of the telescope led to the discovery of what planet?

Answer 29

Uranus

Question 30

Visible light can tell us a lot about what?

Answer 30

The universe

Question 31

How do scientists know stuff about the universe?

Answer 31

By detecting waves from objects in space

Question 32

What gives out a lot of visible light?

Answer 32

Stars

Question 33

Why can we see stars even though they're very far away?

Answer 33

They give out lots of visible light

Question 34

Why can we see planets in our solar system?

Answer 34

They reflect sunlight

Question 35

How did early astronomers make observations about our solar system?

Answer 35

Using the naked eye

Question 36

Astronomical objects that are so far away and look so small that the naked eye observations are only useful for what?

Answer 36

Mapping their positions

Question 37

What very important discoveries were found using the naked eye?

Answer 37

Stars Comets Planets

Question 38

What do telescopes do?

Answer 38

Magnify images

Question 39

When telescopes magnify images would does it allow us to do?

Answer 39

See distant objects in more detail and see objects that are at larger distances

Question 40

Using telescopes have helped us learn what?

Answer 40

More about how the universe is made up

Question 41

Do telescopes on earth have problems?

Answer 41

Yes

Question 42

Space telescopes can overcome the issues that earth telescopes have but what is the disadvantage?

Answer 42

They're expensive

Question 43

How do telescopes allow photographs of the universe to be taken?

Answer 43

They allow you to 'zoom in' and look at objects in more detail

Question 44

Taking photographs of the universe makes it easier to do what:

Answer 44

Monitor an object but taking pictures at different times to compare them Share your observations with others See faint objects by allowing a long exposure time so you collect more light - which can't be done with the naked eye