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Science finals - GR 9 > Space > Flashcards

Space Flashcards

1
Q

Q1: What is astronomy?

A

A1: The study of stars, planets, and space.

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2
Q

Q2: What is a galaxy?

A

A2: A group of stars, gas, and dust held together by gravity.

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3
Q

Q3: What are satellites?

A

A3: Objects that orbit planets, like the Moon or man-made satellites.

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4
Q

Q4: What do telescopes do?

A

A4: They help us see faraway objects in space.

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5
Q

Q5: What is an astronomical unit (AU)?

A

A5: The distance from Earth to the Sun (about 150 million km).

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6
Q

Q6: What is a light year?

A

A6: The distance light travels in one year (about 9.46 trillion km).

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7
Q

Q7: What is the order of the universe?

A

A7: Galaxies → Groups → Clusters → Superclusters → Universe.

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8
Q

Q8: What are the inner planets?

A

A8: Mercury, Venus, Earth, and Mars (small and rocky).

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9
Q

Q9: What are the outer planets?

A

A9: Jupiter, Saturn, Uranus, and Neptune (big and made of gas).

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10
Q

Q10: What is the asteroid belt?

A

A10: A ring of rocks between Mars and Jupiter.

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11
Q

Q11: What is the Oort Cloud?

A

A11: A distant area full of icy objects around the solar system.

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12
Q

Q12: Which planet is the biggest?

A

A12: Jupiter.

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13
Q

Q13: Which planet is the smallest?

A

A13: Mercury.

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14
Q

Q14: What is a meteoroid?

A

A14: A small rock in space.

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15
Q

Q15: What is a meteor?

A

A15: A meteoroid that burns up in Earth’s atmosphere (a shooting star).

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16
Q

Q16: What is a meteorite?

A

A16: A meteor that hits the ground.

17
Q

Q17: What is an asteroid?

A

A17: A large rock in space, usually in the asteroid belt.

18
Q

Q18: What is a comet?

A

A18: An icy object in space with a tail of gas and dust.

19
Q

Q19: What does the Moon do for Earth?

A

A19: It causes tides and stabilizes Earth’s rotation.

20
Q

Q20: What are the Moon’s phases?

A

new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent.

21
Q

Q21: What is a solar eclipse?

A

A21: When the Moon blocks the Sun from Earth.

22
Q

Q22: What is a lunar eclipse?

A

A22: When Earth blocks sunlight from reaching the Moon.

23
Q

Q23: What is rotation?

A

A23: A planet spinning on its axis (causes day and night).

24
Q

Q24: What is revolution?

A

A24: A planet orbiting the Sun (causes a year).

25
Q

Q25: What causes seasons?

A

A25: Earth’s tilted axis and its revolution around the Sun.

26
Q

Q26: What is an equinox?

A

A26: When day and night are the same length.

27
Q

Q27: What is a solstice?

A

A27: The longest day (summer) or longest night (winter).

28
Q

Q28: What is the Sun?

A

A28: A star at the center of our solar system.

29
Q

Q29: What are stars made of?

A

A29: Mostly hydrogen and helium.

30
Q

Q30: What is the life cycle of a star?

A

A30: Nebula → Main Star → Red Giant → White Dwarf, Neutron Star, or Black Hole.

31
Q

Q31: What are auroras?

A

A31: Colorful lights caused by the Sun’s particles hitting Earth’s atmosphere.

32
Q

Q32: What are space probes?

A

A32: Unmanned spacecraft that collect data from space.

33
Q

Q33: Why are telescopes important?

A

A33: They help us study faraway objects.

34
Q

Q34: What was a major space exploration event?

A

A34: The Moon landing in 1969 (Apollo 11).

35
Q

Q35: When is the spring equinox in the northern hemisphere?

A

A35: March 20 or 21.

36
Q

Q36: When is the fall equinox in the northern hemisphere?

A

A36: September 22 or 23.

37
Q

Q37: When is the summer solstice in the northern hemisphere?

A

A37: June 20 or 21.

38
Q

Q38: When is the winter solstice in the northern hemisphere?

A

A38: December 21 or 22.

39
Q

Q39: Do these dates switch in the southern hemisphere?

A

A39: Yes, seasons are opposite.

Science finals - GR 9 (6 decks)

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