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Physica Space And Beyond > Space And Beyond > Flashcards

Space And Beyond Flashcards

1
Q

How fast is the speed of light

A

Around 300,000 kilometres per second

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2
Q

How long does it take the speed of light to reach the sun from earth

A

500 seconds

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3
Q

How long does it take the speed of light to reach the nearest other star

A

4 years

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4
Q

How long does it take the speed of light to reach the virgo cluster

A

40 milion years

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5
Q

How are stars made

A

New stars form from the gas and dust in galaxies. This is pulled together by gravity. Enough material is pulled together and starts to get hot and shine. A new star is born, the star makes the gas around glow

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6
Q

Why do stars shine

A

Nuclear fusion of hudrogen gas and helium gas makes it shine

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7
Q

Where might have life existed on mars in the past

A

If there was water on the surface or underground

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8
Q

Might life be on mars today

A

Microorganisms but no form of life

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9
Q

What evidence shows that there may be life on a planet

A

Living things normally change the atmosphere around them. The Earth’s atmosphere, for example, contains far more oxygen than ti would fi there were no living organisms.

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10
Q

Why do scientists believe there might be life on europa

A

Lots of ice that could of been water

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11
Q

How can lif ebe dected througn ice

A

Heat detectors

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12
Q

Why do scientists think theres prob life

A

Theres so many planets

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13
Q

Why will we never no if theres life

A

Unless they are developed, we will never be able to realise

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14
Q

What are reflecting telescopes

A

Uses light to refract and focus the light. They used curved mirrors to form an image which is then magnified by a second mirror

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15
Q

Whata re reflecting telescopes

A

Uses curved mirrors to reflect and focus light

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16
Q

What are the components of a telescope

A

Obkective lense
Eyepiece lense

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17
Q

Dissadvantages of a refracting telescope

A

The light reflects of the lense so the image is very faint

Large lenses need to improve magnification

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18
Q

Dissadvantages of a refracting telescope

A

The light reflects of the lense so the image is very faint

Large lenses need to improve magnification

Light weight and portable

Hardly needs maintancence

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19
Q

One benifit of soace program

A

U derstanding space and science itself

20
Q

Hazards of space travel

A
  • Polution from rocket launches (global warming)
  • Very expensive (374 milion a year)
  • Dangerous (space junk, solar flares, asteroid feilds
  • radiation (risk to astronaughts and toox material)
  • parachute malfunction - any reasources or data collected lost
  • combustion of space craft re entering the earth
21
Q

What are solar flares

A

Radiation from the sun thrown out from the suns surface causing radiomagnetic disturbances on earth

22
Q

What is required for a reaction to occur,

A

Must have sufficient energy, correct orientation amd shot at the right angle

23
Q

How does pressure effect the rate of reaction

A

It decreases the volume which increases the concentration

24
Q

What is matter

A

matter is any substance that has mass and takes up space by having volume.

25
Q

Whats dark matter

A

Invisible matter that dosent react with electromagnetic forces

26
Q

Whats wind energy

A

Force of wind turns turbines to spin which transforms kinetic energy into electric energy

27
Q

Whats tidal power energy

A

High tide is trapped and released as a low tide, when released it turns turbines which make energy

28
Q

How does solar work

A

Energy from the sun heats pannels and made into electricity cells

29
Q

How to operate a coal fired power station

A

Coal burnt makes steam drives turbines into electricity. Steam is condensated again

30
Q

How do bipfeusl work

A

Chemical energy once stored in alive things like animals amd plants are transferred into thermal energy through being burnt making steam

31
Q

Nuclear energy

A

Atoms in radioactive feuls split into 2 causing a chain reaction, when they split it creates energy boiling water

32
Q

Geothermal energy

A

Natural heat from rocks underground boils water thats being fed through pumps turning into steam

33
Q

What would outerspace sognals be like

A

Irregular and repetative

34
Q

How are stats made

A

Thinly spread out matter is pulled together by gravity
This spread out as it was mainly hydrogen and helium
Like the sun, hygrogen and heliem form otgetjer. This is called nuclear fission.

35
Q

Whats hydroelectric power

A

Rainwater ina. Resovoir flows downhill and drives turbines

36
Q

Whats hydroelectric power

A

Rainwater ina. Resovoir flows downhill and drives turbines

37
Q

Wave power

A

Floating generators move up and down, motion turns the generator so it makes electrocity. Its passed to land through shoreline delivers

38
Q

How was the solar system maxe

A

Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula – a spinning, swirling disk of material.

39
Q

Differences betweent he 3 galaxies

A

Spiral galaxies have a central large bulge with a flattened surrounding disk with spiral arms. Elliptical galaxies have semi-spherical or elliptical shapes. And irregular galaxies lack structure and organized shape.

40
Q

Whats redshift

A

In physics, a redshift is an increase in the wavelength of light from a distant star moving away from earth

41
Q

Whats cmbr

A

smic microwave background (CMB) is leftover radiation from the Big Bang or the time when the universe began

42
Q

What is dikute

A

More concentrated

43
Q

What does it mean if its more concentrated

A

greater concentration oer unit volume (acid) Therefore more collisions per unit time

44
Q

What can give accuracy when measuring liquids or gases

A

burette functions as a tool for measuring both liquids and gases with high accuracy and can be used in replacment as a measuring cylinder

45
Q

What does concentration effect

A

greater concentration oer unit volume (acid) Therefore more collisions per unit time

46
Q

What can decrees surface area

A

pestle and mortar

Physica Space And Beyond (1 decks)

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