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Science > Final 2016 > Flashcards

Final 2016 Flashcards

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1
Q

About Refracting telescopes

A 
Expensive
2 sided finish
precise 
heavy
Lens
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2
Q

Reflecting telescopes

A

Mirrors
lighter in weight
can fold
light bounces back

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3
Q

The shortest wavelength is

A

GammaRay

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4
Q

The longest wavelength is

A

Radio waves

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5
Q

The colors of the electromagnetic spectrum from longest to shortest

A

Red Orange yellow Green violet

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6
Q

What is the goal of the NASA great observatories

A

Image the universe in all wave lengths

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7
Q

What does the Hubble Telescope detect in

A

UV

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8
Q

What does the Chandra telescope detect in

A

X-ray

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9
Q

Spritzer detects in….

A

Infrared

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10
Q

Compton detects in……..

A

Gamma rays

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11
Q

1 Parsec is how many AU’s

A

206,264 AU’s

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12
Q

1 Parsec is how many light years

A

3.26 ly

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13
Q

Hubble constant is based on …

A

The expansion rate of the universe

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14
Q

1 AU is how many km

A

1.496 x 10 to the 8th km

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15
Q

1 AU is how many miles

A

9.3 x 10 to the 7th miles

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16
Q

One light year is how many miles

A

9.46 x 10 to the 15th mile

17
Q

One light year is how many kilometers

A

9.46 x 10 to the 12th km

18
Q

1 light year is how many AU

A

62239

19
Q

Gravity (four forces)

A

Force of attraction between objects

20
Q

Electromagnetic (four forces)

A

Opposites attract,same repel. Holds the atom together

21
Q

Strong nuclear (four forces)

A

Glues the nucleus together

22
Q

Weak Nuclear (four forces)

A

Radioactive decay nucleus breaks down

23
Q

Factor that will determine the fate of our universe

A

Critical density

24
Q

Open universe

A

Density lowers
less gravity
recedes outwards
Cold death

25
Q

Closed universe

A

Expands outward then contracts inward

26
Q

blueshift

A

Objects moving toward the earth

27
Q

Red shift

A

Objects moving away from earth

28
Q

Milky Way galaxy is what type of galaxy

A

Barred spiral

29
Q

Age of our universe

A

13.8 billion years old

30
Q

Constellations are….

A

Groups of stars that form a pattern or picture on the sky

31
Q

Are the three classifications of galaxies

A

Spiral,elliptical and Irregular galaxies

32
Q

Open star clusters characteristics

A 
Young hot stars
Spread further apart
Gas and dust 
fewer stars
Disk
33
Q

Globular star cluster

A 
Spherical shape
Lots of stars
Read all the stars 
no star formation 
halo bulge
34
Q

Most common elements of stars

A

Hydrogen and helium

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