AS Flashcards

1
Q

an area in the sky containing a group of stars in a pattern is called

A

constellation

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2
Q

a notable grouping of stars that do not contain a constellation

A

asterism

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3
Q

how long does it take our sun to revolve around the celestial sphere

A

365.25 days

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4
Q

when 3/4 of the moon’s lit surface faces the earth, and the lit part is shrinking, we say it’s a ___ moon

A

waning gibbous

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5
Q

who said “a great central fire controlled all motion in the universe”

A

pythagoras

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6
Q

claudius ptolemy proposed what idea that explained planetary retrograde motion

A

epicycles

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7
Q

Johannes Kepler created 3 laws concerning interplanetary motion. which one of the laws below is NOT one of Kepler’s

a. each planet’s path around the sun is an ellipse, with the sun at one focus of the ellipse
b. a planet speeds up when it is closer to the sun, and slows down when it is farther away
c. if you know how long a planet takes to orbit the sun, you can tell its average distance from the sun, vice versa
d. E=mc^2

A

d. E=mc^2

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8
Q

sir isaac newton created 3 universal laws of motion. which one of the laws below is NOT one of newton’s?

a. a body in motion tends to stay in motion, and a body at rest tends to stay at rest
b. the acceleration of an object is proportional to the force exerted on it
c. for every action there is an equal and opposite reaction
d. mass can neither be created nor destroyed

A

d. Mass can neither be created nor destroyed

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9
Q

shape of earth is most accurately described as

A

oblate spheroid

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10
Q

earth’s interior is made up mostly of

A

olivine

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11
Q

the earth consists of 3 layers, which of the following is NOT one of the layers

a. crust
b. magma
c. mantle
d. core

A

b. Magma

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12
Q

what percent of the atmosphere is nitrogen

A

78%

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13
Q

what percent of the atmosphere is oxygen

A

21%

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14
Q

what percent of the atmosphere are trace gases and mostly argon

A

1%

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15
Q

what layer of the atmosphere do we live, work, and play in

A

troposphere

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16
Q

the 2 times in a year where we have our longest and shortest days

A

summer and winter solstice

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17
Q

charged particles from the sun are captured by earth’s magnetic field, also known as what?

A

van allen belt

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18
Q

name for lighted moving “curtains” in our polar regions

A

aurora borealis

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19
Q

which “tide” occurs during full moons and new moons

A

spring tide

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20
Q

during a total lunar eclipse, what color is the moon?

A

deep red

21
Q

what caused the “maria” on the moon

A

volcanos

22
Q

what is the most widely accepted theory for the formation of our moon

A

large impact theory

23
Q

primary source of the sun’s energy comes from

A

a series of nuclear fusion reactions

24
Q

birthplace of stars

A

nebulae

25
Q

stars are made up of mostly what two gases

A

hydrogen and helium

26
Q

out of earth, mars, mercury, and uranus, which one is not a terrestrial planet

A

uranus

27
Q

jupiter and neptune are examples of what type of planet

A

jovian

28
Q

celestial bodies that orbit planets are called what

A

satellites and moons

29
Q

distance between the sun and earth

A

93,000,000 miles

30
Q

what is a light year

A

the distance it takes light to travel in one year

31
Q

6 trillion miles equals what

A

one light year

32
Q

the current most accepted theory for solar system’s origin is

A

the solar nebula theory

33
Q

mercury shows no signs of a(n)

A

atmosphere

34
Q

mercury’s temp ranges from ___ degrees in the daytime to ___ degrees at night

A

800 and -280

35
Q

venus and earth have similar what

A

diameters

36
Q

mercury and venus are only visible..

A

just before sunrise and/or just after sunset

37
Q

the planet with the daytime summer temperatures most similar to earth’s is what

A

mars

38
Q

the largest and fastest rotating planet is

A

jupiter

39
Q

jupiter’s _____ is 20,000 times greater than Earth’s

A

magnetic field

40
Q

saturn’s density is such that it

A

would float if you could place it in a very large ocean

41
Q

saturn’s moon TITAN is the only moon in our solar system known to have a(n)

A

atmosphere

42
Q

international astronomical union created 3 categories for celestial bodies orbiting the sun. which of the following is not one of those categories?

a. trans-kuiper objects
b. planets
c. dwarf planets
d. small solar system bodies

A

a. trans-kuiper objects

43
Q

largest known object in the asteroid belt

A

ceres

44
Q

between which two planets is the asteroid belt located at

A

mars and jupiter

45
Q

what is the name of the theoretical sphere where billions of comet nuclei exist

A

oort cloud

46
Q

what is this object found on the surface of a planet

A

a meteorite

47
Q

a black hole is

A

a super dense object in space where escape velocity exceeds the speed of light

48
Q

mnemonic for order of planets

A

my very excellent mother just served us some nachos