Science: Sun/moon/planets

Front 1

An imaginary line where the land seems to meet the sky

Back 1

horizon

Front 2

An ________ is a real or imaginary line through the center of a spinning object.

Back 2

axis

Front 3

Earth ____________ like a giant top this is spinning in space.

Back 3

rotates

Front 4

Earth is shaped like a ________.

Back 4

sphere

Front 5

An object that moves around another object ___________.

Back 5

revolves

Front 6

The path Earth takes as it travels around the Sun.

Back 6

orbit

Front 7

Spring, summer, fall, and winter are ____________.

Back 7

seasons

Front 8

The ___________ is an imaginary line around the middle of Earth.

Back 8

equator

Front 9

The moon has many ________ based on its appearance/shape, including full, half, and gibbous.

Back 9

phases

Front 10

As we see more of the Moon's lit surface, we say the Moon is a __________ moon. Something that is getting bigger is _______.

Back 10

waxing

Front 11

As we see less of the Moon's lit surface, we say the Moon is ________. Something that is getting smaller is _________.

Back 11

waning

Front 12

The four-week cycle of changing phases of the moon is called the _________ cycle.

Back 12

lunar

Front 13

When Earth is between the Moon and the Sun a _________ occurs. When this happens Earth's shadow falls on the Moon.

Back 13

lunar eclipse

Front 14

In 1957 ______________ was the first spacecraft to travel into space.

Back 14

Sputnik

Front 15

In 1969, the spacecraft Apollo 11 landed on the moon. For the first time astronauts ________ on the moon.

Back 15

walked

Front 16

A large sphere in space that orbits a star is a __________.

Back 16

planet

Front 17

If counting Pluto there are ______ planets.

Back 17

nine

Front 18

The _________ is made of the Sun, the planets, and other objects that orbit around it.

Back 18

solar system

Front 19

A ______ is a hot glowing ball of gas.

Back 19

star

Front 20

_____________ are chunks of rock or metal.

Back 20

asteroids

Front 21

_________ are mostly ice mixed with bits of rocks and dust.

Back 21

comets

Front 22

_________ are small pieces of rock or metal that have broken off comets or asteroids.

Back 22

meteors

Front 23

The sun rises every morning in the ________.

Back 23

east

Front 24

The sun sets every night in the ____________.

Back 24

west

Front 25

At the nothern end of the Earth's axis is ___________

Back 25

The North Pole

Front 26

Mercury, Venus, Earth, and Mars are the ________ planets.

Back 26

inner

Front 27

Jupiter, Saturn, Uranus, and Neptune are the ________ planets.

Back 27

outer

Front 28

A ____________ is a tool that gathers light to make faraway objects appear larger, closer, and clearer.

Back 28

telescope

Front 29

A curved piece of glass is used to make a __________.

Back 29

lens

Front 30

A __________is a very large group of stars.

Back 30

galaxy

Front 31

In 1543 a scientist named __________ said that the Sun, not Earth, was at the center of the solar system.

Back 31

Copernicus

Front 32

In 1609 ____________ used his telescope to discover evidence that Earth orbits the sun.

Back 32

Galileo

Front 33

Our solar system is in a galaxy we call the _____________.

Back 33

Milky Way

Front 34

A large group of ____ can form a picture called a constellation.

Back 34

stars

Front 35

The Little Dipper and the Big Dipper are both examples of a __________________.

Back 35

constellation

Front 36

The first astronaut in 1969 to walk on the Moon was ________.

Back 36

Neil Armstrong

Front 37

Along with Neil Armstrong, ____________ also walked on the moon in 1969.

Back 37

Buzz Aldrin