space Flashcards

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1
Q

weight

A

measurement of the effect of gravity on a given mass. with less gravity on the moon, you weigh less. with more gravity on earth, you weigh more.

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2
Q

tide

A

rise and fall of the sea level. Regular cycles of changing sea levels are caused by the gravitational pull of the sun and moon.

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3
Q

tidal range

A

difference in height between high and low tide

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4
Q

Bay of Fundy in eastern Canada

A

The most extreme tidal range in the world. Water is funneled from a wide bay into a narrowing river, causing dramatic sea level changes.

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5
Q

How Many high tides and low tides does a planet experience each day?

A

In one 24 hour period, two high tides and two low tides sweep across the planet

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6
Q

what effect does gravity have on ocean tides?

A

Every object with a mass exerts gravitational pull. The moon has mass, so so it’s gravity pulls on the earth’s oceans.

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7
Q

Why does the moon shine?

A

it reflects sunlight

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8
Q

what causes the moon to orbit around the earth?

A

the gravitational pull of earth on the moon. The changing relative positions of the moon, earth, and sun cause the phases of the moon eclipse and tides

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9
Q

the different forms the moon takes in its appearance from earth

A

phases

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10
Q

uses convex lenses to concentrate Light from a distance object

A

refracting telescopes

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11
Q

uses a concave mirror to see distance objects

A

reflecting telescope

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12
Q

telescope that collects radio waves and some microwaves using an antenna that looks like a TC satallite dish. used to detect objects in space, map the universe, and looks foe signs of life on other planets

A

radio telescope

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13
Q

the first optical space reflecting telescope that orbits earth

A

Hubble SpaceTelescope

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14
Q

use light to produce magnified images

A

optical telescope

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15
Q

helped launch objects into space by propelling itself by ejecting exhaust gas from one end.

A

rocket

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16
Q

object that revolves around another object in an orbit,

A

satellite

17
Q

unscrewed spacecraft sent from earth to explore objects in space

A

space probes

18
Q

reusable spacecraft that transports people and matrerials to and from space

A

space shuttle

19
Q

what year did the us and 15 other countries begin construction on the international space station?

A

1998

20
Q

the day when the Earths rotation axis is the most towards or away from the sun

A

solstice. summer solstice is in June. winter solstice is in December

21
Q

day when the earths rotation axis is leaning along earth’s orbit.

A

equinox. Spring equinox is in March. Fall equinox is in September

22
Q

what causes the season’s to change?

A

the tilt of earth’s rotation axis, combined with earth’s motion around the sun causes the seasons to change.

23
Q

how log does it take earth to follow a path around the sun, making one complete revolution?

A

365.24 days or one year

24
Q

as earth revolves around the sun, it rotates or spins on its rotational axis, how long is one rotation?

A

24 hours

25
Q

tide that occurs twice a month and results in the smallest change in sea level

A

neap tide

26
Q

tide that occurs twice a month and results in the greatest change in sea level

A

spring tide

27
Q

what happens to tides when the sun, moon, and earth are aligned?

A

spring tide

28
Q

what happens when the sun and moon are at right angles?

A

neap tide

29
Q

how many spring tides occur each year?

A

24