science quiz Flashcards

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1
Q

define astronomy

A

The scientific study of space

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2
Q

define universe

A

Everything that exists, including all energy matter and space

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3
Q

define Celestial object

A

Any object that exists in space

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4
Q

Define Satellite

A

A celestial object that travels around a planet or dwarf planet

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5
Q

Define Orbit

A

The closed path of a celestial object or satellite as it travels around another celestial object

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6
Q

Define Luminous

A

Luminous means something that emits light or glows

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7
Q

Define Galaxy

A

A huge rotating collection of gas, dust and billions of stars, planets and celestial objects

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8
Q

Define Solar system

A

The sun and all the objects that revolve around it

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9
Q

Part of the sun that nuclear fusion occurs in

A

Core

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10
Q

Energy travels from the core to these layers overtime

A

Radiation Zone

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11
Q

Together with radiative zone

A

Convection Zone

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12
Q

The suns surface where light can escape

A

Photosphere

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13
Q

Extends millions of km into space

A

Corona

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14
Q

Cooler areas on the suns surface that shows up as dark spots

A

Sun spots

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15
Q

Loops of Plasma created by the suns magnetic field

A

prominence

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16
Q

Explosions that throw plasma into space

A

Solar Flare

17
Q

Define Astronomical Unit

A

Distance from the Earth to the sun

18
Q

Define Light Year

A

How far light travels in 1 year

19
Q

Describe Terrestrial planet

A

A rocky planet with a solid surface and thin atmosphere
(Mercury, Venus, Earth, Mars)

20
Q

Define Gas Giant

A

A gas giant is a huge planet made mostly of gases like hydrogen and helium

21
Q

Define Dwarf Planet

A

A dwarf planet is a small planet-like object in space

22
Q

Define Asteroid

A

An asteroid is a small, rocky object in space that orbits the sun

23
Q

Define Meteoroid

A

A meteoroid is a small rock or particle in space

24
Q

Define Meteor

A

A meteor is a bright streak of light in the sky

25
Q

Define Comets

A

Comets are celestial objects composed of ice, dust, rock and organic compounds

26
Q

Define Dark Matter

A

Dark matter is composed of particles that do not absorb, reflect, or emit light they also pull galaxies together

27
Q

Define Dark energy

A

a theoretical repulsive force that counteracts gravity and causes the universe to expand at an accelerating rate.

28
Q

Inner layer of the suns atmosphere

A

Chromosphere