Lesson 3: Vocabulary

Question 1

Venus

Answer 1

Closely resembles Earth in it’s size, physical composition, and density.

Question 2

Earth

Answer 2

Third planet from the Sun

Question 3

The Moon

Answer 3

Earth’s only natural satellite

Question 4

New Moon

Answer 4

When the unlit side of the Moon faces the earth

Question 5

Mercury

Answer 5

The closest planet to the Sun

Question 6

Crescent Moon

Answer 6

A small sliver of the moon is visible

Question 7

Waxing

Answer 7

Growing larger

Question 8

First Quarter Moon

Answer 8

The angle between the Moon, Earth, and Sun is 90 degrees and we can see one half of the moon

Question 9

Gibbous Moon

Answer 9

Most of the Moon is visible

Question 10

Full Moon

Answer 10

The whole face of the moon is visible

Question 11

Waning

Answer 11

Growing smaller

Question 12

Phases of the Moon

Answer 12

Full, Waxing Gibbous, First Quarter, Waxing Crescent, New, Waning Crescent, Third Quarter, Waning Gibbous

Question 13

Solar Eclipse

Answer 13

The Moon’s shadow occasionally passes across part if the earth’s surface

Question 14

Umbra

Answer 14

Darkest part of the shadow (total eclipse)

Question 15

Penumbra

Answer 15

A shadow where only some of the light is blocked (partial eclipse)

Question 16

Lunar Eclipse

Answer 16

The Moon passes through the Earth’s shadow

Question 17

Mars

Answer 17

Referred to as “the red planet”, smaller than Earth and Venus, twice the size of the Moon

Question 18

Magnetosphere

Answer 18

An envelope of magnetic protection

Question 19

Terrestrial

Answer 19

The four planets that are nearest the Sun and are similar in density and composition

Question 20

Jovian

Answer 20

Any of the four major planets, Jupiter, Uranus, Saturn, or Neptune.