Our Solar System

Question 1

Solar System

Answer 1

sun, planets, and all the other objects that revolve around the sun

Question 2

sun

Answer 2

A star that is the source of light and heat for the planets in a solar system.

Question 3

nuclear fusion

Answer 3

the process by which two or more nuclei with small masses join together to form a larger more massive nucleus, along with the production of energy

Question 4

hydrogen and helium

Answer 4

the two gases that make up most of the sun’s mass

Question 5

sun spots

Answer 5

black spots on the sun’s surface (photosphere), cooler than the surrounding area because of the sun’s magnetic field that keeps in heat and light

Question 6

solar flares

Answer 6

Giant storms on the surface of the sun.

Question 7

temperature

Answer 7

characteristic used to classify stars

Question 8

gravity

Answer 8

Attractive force between two objects that depends on the masses of the objects and the distance between them.

Question 9

star classification

Answer 9

Stars are classified by their color and temperature

Question 10

terrestrial planets

Answer 10

The name often given to the four inner planets: Mercury, Venus, Earth, and Mars.

Question 11

Jovian Planets

Answer 11

Jupiter, Saturn, Uranus, and Neptune because they are gaseous

Question 12

asteroid

Answer 12

any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)

Question 13

asteroid belt

Answer 13

the region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found

Question 14

Meteroid

Answer 14

a small body moving in the solar system that would become a meteor if it entered the earth’s atmosphere.

Question 15

meterorite

Answer 15

a meteoroid that does not completely burn up in the atmosphere and strikes the surface of a moon or planet

Question 16

Venus

Answer 16

the hottest planet

Question 17

Jupiter

Answer 17

largest planet

Question 18

Saturn

Answer 18

has a complex ring system

Question 19

Uranus

Answer 19

spins on its side

Question 20

Neputune

Answer 20

windy planet

Question 21

Mars

Answer 21

red planet due to iron

Question 22

Mercury

Answer 22

the closest planet to the Sun, very cold on one side and very hot on the other, smallest planet, and no moons.

Question 23

comet

Answer 23

A ball of frozen dust and rock that orbits the sun and has a tail that glows

Question 24

planetesimals

Answer 24

a small body from which a planet originated in the early stages of development of the solar system

Question 25

dwarf planet

Answer 25

a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.

Question 26

Orbital motion is a combination of

Answer 26

inertia and gravity

Question 27

Newton's Law of Universal Gravitation

Answer 27

The law that says every object in the universe attracts every other object, and that the force is affected by mass and distance: the greater the mass of an object, the greater the attraction; the farther apart the objects, the weaker the attraction.