solar system

Question 1

nebula

Answer 1

a cloud of gas and dust in outer space

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

Question 4

sunspot

Answer 4

temporary phenomena on the Sun’s photosphere that appear as spots darker than the surrounding areas

Question 5

terrestrial planets

Answer 5

a planet that is composed primarily of silicate rocks or metals

Question 6

prograde rotation

Answer 6

orbital movement that is the same as most bodies within a celestial system. In our solar system

Question 7

retrograde rotation

Answer 7

which is counterclockwise when viewed from above the Sun’s north pole

Question 8

gas giant

Answer 8

giant planet composed mainly of hydrogen and helium

Question 9

satellite

Answer 9

an artificial object which was intentionally placed into orbit

Question 10

new moon

Answer 10

the new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude

Question 11

waxing crescent

Answer 11

it means the moon has become to refer to either the waxing or waning shape of the moon

Question 12

1st quarter moon

Answer 12

when we can see exactly half of the Moon’s surface illuminated

Question 13

waxing gibbous

Answer 13

refers to the shape, which is less than the full circle of a Full Moon, but larger than the semicircle shape

Question 14

full moon

Answer 14

most spectacular Moon phase when the entire face of the Moon is lit up

Question 15

waning gibbous

Answer 15

Moon rises after sunset, transits the meridian after midnight and sets after sunrise

Question 16

last quarter moon

Answer 16

The moon has moved another quarter of the way around Earth, to the third quarter position

Question 17

waning crescent

Answer 17

refers to the shrinking of the Moon’s illumination

Question 18

solar eclipse

Answer 18

occurs when an observer passes through the shadow cast by the Moon which fully or partially blocks the Sun

Question 19

lunar eclipse

Answer 19

occurs when the Moon passes directly behind Earth and into its shadow

Question 20

comet

Answer 20

are icy bodies in space that release gas or dust

Question 21

asteroid

Answer 21

are minor planets

Question 22

asteroid belt

Answer 22

a region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found

Question 23

meteroid

Answer 23

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

Question 24

meteroite

Answer 24

solid piece of debris

Question 25

meteor

Answer 25

small metallic body in outer space