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cchs > planet earth (H) > Flashcards

planet earth (H) Flashcards

1
Q

nebula

A

cloud of gas and dust

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2
Q

singularity

A

point in which the universe came from

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3
Q

direct relationship

A

when both variables change

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4
Q

indirect relationship

A

only one variable changes

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5
Q

Andromeda Galaxy

A

the closest spiral galaxy

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6
Q

Drake Equation

A

way to calculate # of civilizations currently transmitting signals to the Milky Way

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7
Q

Fermi Paradox

A

where is everyone?

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8
Q

Proxima Centauri

A

closest star to the sun

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9
Q

Virgo Supercluster

A

the cluster our galaxy is located in

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10
Q

The Local Group

A

galaxy group including Milky Way

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11
Q

Jovian Planet

A

Gas planet

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12
Q

Terrestrial Planet

A

Rocky planet

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13
Q

Main sequence

A

line of stars, used to understand the lives of stars

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14
Q

Sun-like Star

A

small stars

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15
Q

Apparent magnitude

A

appears to be how bright the stars seem to the observer

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16
Q

Absolute magnitude

A

The brightness of stars from a certain distance

17
Q

White dwarf

A

after planetary nebula “explodes”

18
Q

Event horizon

A

everything within space is being pulled faster than speed of light

19
Q

Gas pressure

A

the force that the gas exerts on the sides

20
Q

Neutron star

A

Red supergiant compresses to the center under gravity, combining protons & electrons

21
Q

Protoplanetary Disk

A

when leftover nebula spins & flattens

22
Q

Planetesimal

A

first objects to accrete

23
Q

Frost Line

A

distance from sun at which it can be cool for ice and gas to exist in protoplanetary disk

24
Q

Nebular Theory

A

what’s thought to be the formation of the Solar System

25
Q

Meteoroid/Meteor/Meteorite

A

Space/Atmosphere/Earth

26
Q

Chicxulub Impact Crater

A

Yucatan Peninsula, Mexico, 65 mya

27
Q

Chelyabinsk

A

Meteorite in Russia, 2013

28
Q

Tektite

A

black, glossy pieces of rock

29
Q

Tunguska

A

1908, in Siberia an meteoroid impact

30
Q

Iridium

A

an element found in the K/T line

31
Q

Protoplanet

A

layered interiors from differentiation

32
Q

Protostar

A

forms out of the nebula when gravity pulls enough matter to the center

33
Q

Red Giant

A

a huge star, when nuclear fusion stops-> planetary nebula

34
Q

planetary nebula

A

the expanding shell of gas that is escaping a dying sun-like star

35
Q

accretion

A

when an object gains additional layers

36
Q

differentiation

A

when a planetesimal gets bigger so that the interior melts and creates layers

37
Q

nuclear fusion

A

the process of forcing together two light atomic nuclei and creating a heavier one

cchs (2 decks)

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