Important People
History
Inner Planets and Moon
Outer Planets
Vocab
100

The first man in space.

Who was Yuri Gagarin?

100

The first US space station.

What was Skylab?

100

Two planets are considered sisters.

What are Venus and Earth?
100

The reason Pluto was reclassified as a dwarf planet.

It can’t clear its orbit and the neighborhood surrounding its orbit.

100

The distance light can travel in one Earth year.

What is a light year?

200

The first American in space.

Who was Alan Shepard?

200

The first artificial satellite.

What was Sputnik 1?

200

The reason the Earth has four seasons.

What is the Earth’s 23.5 degree tilt on its axis?

200

The planet that spins on its side.

What is Uranus?

200

The space between the Earth and the Moon.

What is Cislunar space?

300

Designed rockets for military use.

Who was Willian Congreve?

300

Discovered the Van Allen Radiation belts.

What was Explorer 1?

300

The reason for tides on Earth.

What is the mutual gravitational attraction between the Moon and the Earth which pulls the water in Earth’s oceans slightly towards the moon?
300

The most prominent gas on Jupiter.

What is hydrogen?

300

The point at which all molecules no longer move or have the least amount of energy.

What is absolute zero?

400

Developed the technique of spin stabilization.

Who was William Hale?

400

The manned spaceflight project linking American and Soviet spacecraft in Earth orbit.

What was Apollo-Soyuz?

400

The gravitation pull of the Moon compared to the Earth.

What is 1/6?

400
The planet that is less dense than water and could float in a body of water.

What is Saturn?

400

Rapidly rotating star that flashes electromagnetic emissions in a set pattern.

What is a pulsar?

500

Improved the accuracy of rockets by launching them through tubes.

Who was Jean Froissart?

500

The US Space transportation System (STS) developed with the goal of reducing spaceflight costs with reusable components.

What is the Space Shuttle?

500

The thin shell of the Sun’s outer layer.

What is the photosphere?

500

The largest moon in our solar system.

What is the Ganymede Moon?

500
What is the difference between a meteor, meteorite, and meteoroid?

A meteoroid is a clump of dust or rock orbiting the Sun.

A meteor is a small streak of light; is only a meteor when it has entered the Earth’s atmosphere.

A meteorite is a meteor that enters Earth’s atmosphere and actually hits Earth’s surface.

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