Sci 238 Final Exam

Front 1

Four largest moons of jupiter were discovered by _____

Back 1

galileo

Front 2

Four largest moons of jupiter are

Back 2

Cegel:

Io, Europa, Ganymede, and Callisto.

Front 3

Wavelengths in order

Back 3

Gamma

Xray

Ultraviolet

Visible

Infrared

Microwave

Radio

Front 4

If we double the temperature (e.g. 1000 K to 2000 K) then the total energy radiated from a blackbody increase by a factor of _____

Back 4

2^4 = 16

Front 5

To an observer on Earth, dust in the interstellar medium will cause a star to appear

Back 5

redder

fainter and cooler than it really is.

Front 6

The Kuiper belt /ometimes called the, is ____

Back 6

a region of theSolar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun

Front 7

The asteroid belt is the region of the Solar System located roughly between the orbits of the planets______ and.

Back 7

Mars

Jupiter

Front 8

What is the habitable zone?

Back 8

is the region around a star within which planetary-mass objects with sufficient atmospheric pressure can support liquid water at their surfaces.

Front 9

_____ Galaxies contain very little gas or dust

Back 9

Elliptical

Front 10

_____ galaxies are hotbeds of star formation, but______ galaxies are deader.

Back 10

Spiral

elliptical

Front 11

In elliptical galaxies there's less gas and dust, which means ______

Back 11

fewer new (and brighter) stars are born.

Front 12

Dark matter may account for ____ percent of the Milky Way's mass.

Back 12

90

Front 13

After death, the Sun will end up as a ____

Back 13

dwarf star

Front 14

A 50 solar star will die and form a ____

Back 14

black hole

Front 15

What's the life process of stars like sun?

Back 15

Star -> Red Giant -> Planetary nebula -> white dwarf -> black dwarf

Front 16

What's the life process of giant stars?

Back 16

Star -> Supernova -> neutron star or a black hole

Front 17

What is a protostar?

Back 17

a contracting mass of gas that represents an early stage in the formation of a star, before nucleosynthesis has begun.

Front 18

Class __ stars are by far the most common main-sequence stars

Back 18

M

Front 19

However, because main-sequence stars of spectral class __ have such low luminosities, none are bright enough to be visible to see with the unaided eye.

Back 19

M

Front 20

Uranus's atmosphere is mostly _____

Back 20

Hydrogen and Helium

Front 21

The atmosphere of Venus is about 96 percent______

Back 21

carbon dioxide

Front 22

Mars, in contrast, has a thin atmosphere composed of about 95 percent ______

Back 22

carbon dioxide

Front 23

The air on Jupiter and Saturn is made up of nearly 100 percent _____ and_____, with small contributions of ______ and other chemical compounds

Back 23

diatomic hydrogen (H2)

Helium (He)

methane (CH4)

Front 24

The spectral class of a star is related to its ___

Back 24

temperature/light