Earth's Moon
Solar System
The Planets
Stars and Galaxy
Space Exploration
100

How long is earth's rotation?

24 hours

100

In a heliocentric system, Earth revolves around ______.

the Sun

100

The asteroid belt is located ______.

between Mars and Jupiter

100

The Milky Way galaxy is an example of a _________.

spiral galaxy

100

The space race was between ______.

the United States and the Soviet Union

200

Galileo saw that much of the moon’s surface is covered with round pits called ______.

craters

200

Most galaxies are moving away from each other, which means the universe is_________

expanding

200

What do all of the inner planets have in common?

They all are small and have rocky surfaces.

200

A supernova is the explosion of a dying ______.

high-mass star

200

At the end of a mission, a shuttle can return to Earth and land like an  _______________________________.

airplane

300

The phase of the moon you see depends on ______.

how much of the sunlit side of the moon faces Earth.

300

What is a geocentric model and who first used it?

solar system revolves around the earth

the Greeks were the first to use it

300

Saturn’s rings are made up mostly of ______.

chunks of ice and rock

300

The lifetime of a star depends on its ______.

mass

300

The space shuttle ______.

a. can only be used once.

b. can be used many times to carry astronauts into orbit.

c. is an unscrewed space probe.

d. carried astronauts to the moon.

b. can be used many times to carry astronauts into orbit.

400

When the north end of Earth’s axis is tilted toward the sun, North America will experience ______

more direct rays and longer days.

400

What is a comet made of and what is the shape of its orbit around the sun?

Made of gas, dust, and ice

Has an oval-shaped orbit around the sun

400

Meteoroids usually come from ______.

comets or asteroids

400

Characteristics used to classify stars include ______.

size, brightness, and temperature.


400

Which event began the space race?

The Soviet Union launched Sputnik I

500

For a solar eclipse to occur, ______.

the moon must be directly between Earth and the sun.

500

Compare and contrast a planet and a dwarf planet.

Compare - both orbit the sun

Difference - dwarf planet does not have more mass than the objects in near by orbit

500

Uranus is different from most other planets because it ______.

rotates on its side

500

A star is ______when nuclear fusion starts.

born

500

Both reflecting and refracting telescopes are designed to ______.

gather and focus visible light

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