Unit 2: Travelling Through Space

Which two factors determine the gravitational force between two objects?

• Time and temperature
• Color and Hardness
• Mass and Distance apart
• Shape and orbital speed

Why are meteoroids usually harmless to Earth?

• They burn up in the atmosphere
• They hit Earth
• They are always hitting other planets
• They are made up of soft material

What causes planets to travel along a curved path instead of moving in a straight line?

• Electromagnetic attraction
• Gravitational attraction between the planet and Sun
• Electromagnetic attraction between the planet and Sun
• Gravitational attraction between the moon and planet

Why do we have seasons?

• Earth is closer to the Sun at certain times throughout the year.
• The Moon is closer to Earth at certain times during the year.
• Earth is tilted on its axis.  When one hemisphere is getting more direct sunlight, that hemisphere is having summer.
• Jupiter is tilted on its axis.  When it is facing towards Earth more, we are having winter.

The moon appears to change shape because of _____.

• the Moon's revolution around Earth
• the seasons of the year
• storms on the moon
• Earth's rotation on its axis

If it is summer in the northern hemisphere, what season will it be in the southern hemisphere?

• Spring
• Summer
• Fall
• Winter

An astronomical unit is defined as...

• The distance between Earth and the Moon
• The distance between the sun and Pluto
• The distance between the sun and Earth
• The distance between the sun and Mercury

(CHOOSE 2 ANSWERS):

Between which 2 planets is the asteroid belt located?

• Earth

• Jupiter

• Saturn

• Mars

Which planet is red because of iron oxide or rust?

• Venus
• Mars
• Jupiter
• Saturn

Which planet's average temperature make it the hottest planet in the solar system?

• Mercury

• Venus

• Earth

• Mars