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2023 science PATs > Space unit E > Flashcards

Space unit E Flashcards

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1
Q

What does Solstice mean?

A

Sun Stops

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2
Q

What does Equinox mean?

A

Equal Night

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3
Q

What did the Ancient Celts in England use to mark the solstices?

A

Stonehenge

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4
Q

What is the Geocentric model?

A

When the planets orbit Earth

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5
Q

Who proposed the idea of the Geocentric model?

A

Aristole

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6
Q

Who proposed the idea of the heliocentric model?
If you know it good but dont waste your time on it

A

Nicolaus Capenicus

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7
Q

What is the heliocentric model?

A

Where the planets orbit the sun

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8
Q

Who used the telescope to see space first?

A

Galileo Galilei

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9
Q

What does the sundial do?

A

measure the passage of time

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10
Q

What does the merket do?

A

measure the time in the night

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11
Q

What does the astrolabe do?

A

make accurate charts of star positions

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12
Q

What does the cross-staff do?

A

measure the angle of the moon and any given star

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13
Q

What does the telescope do?

A

study and magnify space

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14
Q

What is a light year?

A

the distance that light travels in a year

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15
Q

What is a star?

A

A hot, glowing ball of gas.

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16
Q

What is the main gas in a star?

A

Hydrogen

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17
Q

What color is a hot Star and What color is a cold star?

A

Hot stars look blue and cold stars look red>

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18
Q

Explain the steps of the birth of a star:

A

dust and gas roll around creating a nebula. Gravity between gas and dust form a rotating cloud. more material is brought into the cloud the temperature increases, Then it starts to glow once the Cloud gets to a specific temperature hydrogen changes to helium, then a star is born.

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19
Q

what is a constellation?

A

a grouping of stars that form patterns.

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20
Q

Name an unofficial constellation

A

The big dipper

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21
Q

What is a galaxy?

A

millions or billions of stars, gas, and dust held together by gravity.

22
Q

Name 3 types of galaxies:

A

Spiral, elliptical and irregular.

23
Q

what are inner (terrestrial) planets?

A

the first 4 planest from the sun

24
Q

what are outer (jovian) planets?

A

4 furthest planets from the sun.

25
Q

What do all terrestrial planets have in common?

A

Rocky with no ring.

26
Q

what do all jovian planets have in common?

A

gaseous with ring(s)

27
Q

Define an Asteroid

A

rocky or metallic bodies in space

28
Q

Define a comet

A

ball of dust and ice

29
Q

What are comets sometimes described as?

A

Dirty snowballs

30
Q

Define a meteoroid

A

Small pieces of rock flying through space with no particular path

31
Q

Define an ellipse

A

the paths of bodies in our solar systems

32
Q

What is a solar eclipse?

A

when the moon passes between the sun and Earth.

33
Q

What is a lunar eclipse?

A

when the Earth passes between the sun and the moon.

34
Q

What is azimuth?

A

when you start at north 0° and go clockwise to get the compass direction

35
Q

What is altitude?

A

measures how high in the sky an object is. start at the horizon 0° and go straight up. you can’t go further than 90°

36
Q

what is zenith?

A

the highest point directly overhead.

37
Q

What is the fundamental law of physics?

A

For every action their is an equal and opposite reaction.

38
Q

What was Canada’s first satellite?

A

Alouette 1 (we were the third to put up a satellite)

39
Q

What was Archytas’s “pigeon”?

A

The first rocket using escaping steam.

40
Q

what was spuntik 1?

A

the first satellite in space.

41
Q

What was special about Russia’s second satellite?

A

Laika the dog was sent on it.

42
Q

3 basic parts of the rocket:

A

payload
Mechanical / structural elements
Fuel

43
Q

name 3 hazards in space for astronauts:

A

Meteorites, radiation, and no protection from the atmosphere

44
Q

4 things space suites contain:

A

layers of different materials, air and water, heating and cooling devices, and waste tubes

45
Q

skip this card!

A

;)

46
Q

what is a refracting telescope?

A

2 lenses that gather and focus light

47
Q

what is a reflecting telescope?

A

Mirrors instead of lenses in a telescope

48
Q

Define interferometry:

A

combining 2 or more telescopes for better images

49
Q

What is parallax?

A

Shift in position in nearby objects

50
Q

What is the doppler effect?

A

an increase or decrease in sound, light, or other wave lengths

51
Q

What is Blueshift?

A

Object moves towards an observer

52
Q

What is red shift?

A

an object moving away from the observer

2023 science PATs (1 decks)

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