Solar System
Planets
Gravity
Distances
Comets, Asteroids, Meteoroids
100

What are the general characteristics of the inner planets?

metallic cores, thinner atmospheres, rocky surfaces

100

Which inner planet has the thinnest atmosphere making for really hot days and very cold nights?

Mercury

100

What is the force that attracts two objects towards each other?

gravity

100

One astronomical unit is equal to:

150 million km/ 93 million miles

100

 Huge chunks of rock and metal believed to be left over pieces from the early solar system

What is an asteroid?

200

What is the "Red Planet"?

Mars

200

The hottest planet in the solar system and "Earth's Twin"

Venus

200

What is inertia?

the tendency of an object to resist any change in its motion

200

What is a light year?

the distance light travel in one year

200

Objects made of ice, gas, and dust, that orbit the sun

What are comets?

300

What is a moon?

a celestial object that revolves around a planet

300

Which inner planet has the shortest day (rotation)?

Earth

300

An object at rest...

wants to stay at rest

300

How far is the earth from the sun?

1 AU

300

Where are meteors found?

burning up in the atmosphere

400

What is a planet?

A celestial object that revolves around a star, has a nearly spherical shape, and has cleared its neighborhood

400

What is the largest planet in our solar system?

Jupiter

400

How does the  mass of an object affect its gravitational pull?

more mass = more gravity

400

What is the distance of one light year?

9.46x10^12 km (9.46 trillion km)/ 6 trillion miles

400

Between which planets can you find most asteroids?

Between Mars and Jupiter

500

What is a solar system?

A star and all the objects that travel around it

500

These planets rotate faster than the terrestrial planets

Outer planets/ gas planets

500

Who proposed that gravity and inertia combine to keep planets in orbit?

Sir Isaac Newton

500

How far is Neptune from the sun?

30 AU

500

What are the three main parts of a comet?

Coma, nucleus, and tails