Test 7 (4.1-4.4) Flashcards

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1
Q

The three basic types of galaxy shapes

A

spiral, elliptical, and irregular

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2
Q

The study of outer space and all that is contained

A

astronomy

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3
Q

A high speed stream of particles that travels outward from holes in the sun’s corona and beats upon the earth’s upper atmosphere

A

solar wind

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4
Q

Dark patches on the sun’s photosphere

A

sunspots

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5
Q

Part of the sun visible only during a solar eclipse.

A

chromosphere or coron

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6
Q

Large clouds of gas and dust floating around in space

A

nebulae

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7
Q

stars that outline a picture in the sky

A

constellation

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8
Q

an area that contains no air

A

vacuum

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9
Q

familiar shape within the constellation Ursa Major which contains pointer stars

A

Big Dipper

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10
Q

the force that resists motion

A

friction

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11
Q

the hottest region of the sun

A

core

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12
Q

spiral arms attached to a straight “bar” that runs through a galaxy

A

barred spirals

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13
Q

streams of gas erupting from the chromosphere and returning in loop like fashion

A

solar prominence

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14
Q

The brightest star in the constellation Perseus

A

Algol

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15
Q

The brightest star in the night sky

A

Sirius

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16
Q

The brightest star in the constellation Leo

A

Regulus

17
Q

The pole star is know as what?

A

Polaris

18
Q

The closest star to the earth

A

the sun

19
Q

The actual explosion of a star

A

supernova

20
Q

The imaginary line that stretches from pole to pole

A

axis of rotation

21
Q

A pair of stars that travel together and rotate around each other as the mood does the earth

A

binary star

22
Q

Star system containing millions to billions of stars

A

galaxy

23
Q

The hottest region of the sun’s atmosphere

A

corona

24
Q

The cluster with about 40 galaxies in which we find Earth

A

Local Group

25
Q

The sun is located how far from the earth

A

93 million miles

26
Q

The part of the sun’s atmosphere closest to its surface

A

chromosphere

27
Q

Be able to identify the following constellations

A

Southern Cross, Cygnus, Draco, Andromeda, Cassiopeia

28
Q

Be able to describe what space is like. Include at least three things that make space different from Earth and its atmosphere. Complete sentences are required

A

no air (vacuum), no air friction, mostly black, unusual activities (weightlessness), extremes of temperature

29
Q

What is the difference between apparent magnitude and absolute magnitude?

A

Apparent magnitude is the measurement used to describe the brightness of a star as it appears from Earth. The actual brightness of a star is called its absolute magnitude.