Solar system

Question 1

Nebula

Answer 1

*a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.

Question 2

Solar Nebula

Answer 2

*Our solar system began forming within a concentration of interstellar dust and hydrogen gas called a molecular cloud.

Question 3

Nuclear Fusion

Answer 3

*a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.

Question 4

Sunspot

Answer 4

*a spot or patch appearing from time to time on the sun’s surface, appearing dark by contrast with its surroundings.

Question 5

Terrestrial Planets

Answer 5

One of the highest dense planets nearest to to sun; Mercury, Venus, Mars, and Earth

Question 6

Prograde Rotation

Answer 6

the counter-clockwise spin of a planet or moon as seen from above the planet’s North Pole; rotation in the same direction as the sun’s rotation

Question 7

Retrograde Rotation

Answer 7

the clockwise spin of a planet or moon as seen from above the planet’ North Pole

Question 8

Gas Giant

Answer 8

a planet that has a deep, massive atmosphere, such as Jupiter, Saturn, Uranus, or Neptune

Question 9

Satellite

Answer 9

a natural or artificial body that revolves around a planet

Question 10

New Moon

Answer 10

*is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible to the unaided eye, except when silhouetted during a solar eclipse. Daylight outshines the earthlight that dimly illuminates the dark side of the new Moon.

Question 11

Waxing Crescent

Answer 11

*The moon is less than one-half illuminated by the sun but less than one quarter illuminated. Occurs when the moon’s illumination is increasing, First Quarter. The moon is one-half illuminated by the sun.

Question 12

1st Quarter Moon

Answer 12

*is a primary Moon phase when we can see exactly half of the Moon’s surface illuminated. If it is the left or right half, depends on where you are on Earth. This First Quarter Moon is in the Northern Hemisphere and mirrors approximately the calendar symbol.

Question 13

Waxing Gibbous

Answer 13

*means that it is getting bigger.

Question 14

Full Moon

Answer 14

*is the most spectacular Moon phase when the entire face of the Moon is lit up. The Full Moon. When the side of the Moon we can see from Earth is fully lit up at Full Moon, the opposite side is in darkness, and vice versa at New Moon

Question 15

Waning Gibbous

Answer 15

*means that its getting smaller.

Question 16

Last Quarter Moon

Answer 16

*Less than half of the moon’s face appears to be getting sunlight, and the amount is decreasing.

Question 17

Waning Crescent

Answer 17

*The Moon appears to be partly but less than one-half illuminated by direct sunlight.

Question 18

Solar Eclipse

Answer 18

happens when the moon comes between Earth and the sun

Question 19

Lunar Eclipse

Answer 19

happens when the earth comes between the sun and moon and the shadow of Earth falls on the moon

Question 20

Comet

Answer 20

a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun

Question 21

Asteroid

Answer 21

a small, rocky object that orbits the sun, usually in a band between the orbits of mars and Jupiter

Question 22

Asteroid Belt

Answer 22

the region of the solar system that is between the orbits of mars and Jupiter and in which asteroids orbit

Question 23

Meteoroid

Answer 23

a relatively small, rocky body that travels through space

Question 24

Meteorite

Answer 24

a meteoroid that reaches the Earth’s surface without burning up completely

Question 25

Meteor

Answer 25

a bright streak of light that results when a meteoroid burns up in the earths atmosphere