I WONDER QUESTIONS...

HOW BIG IS VENUS?

• 4.867E24 kg (0.815 Earth mass) Venus, Mass

WHY IS THERE 8 PLANETS IF WE ONLY USE ONE?

• There can be more than 8 planets
• And we do not use others cause humans can't live on them
• Because it does not have the things we need.

WHY IS THE EARTH ROUND?

• The Solar System is made up of all the planets that orbit our Sun.
• In addition to planets, the Solar System also consists of moons, comets, asteroids, minor planets, and dust and gas.
• Solar System is made up of over 100 worlds that are every bit as fascinating.
• Some of these minor planets, and moons are actually larger than the planet Mercury.

WHY IS THERE A SOLAR SYSTEM

• Our solar neighborhood is an exciting place.
• The Solar System is full of planets, moons, asteroids, comets, minor planets,
• and many other exciting objects.
• Learn about Io, the explosive moon that orbits the planet Jupiter, or explore the gigantic canyons and deserts on Mars.

WHAT ARE PLANETS MADE OUT OF?

• Earth and the other three inner planets of our solar system (Mercury, Venus and Mars) are made of rock,
• containing common minerals like feldspars and metals like magnesium and aluminum.
• So is Pluto. The other planets are not solid. Jupiter, for instance, is made up mostly of trapped helium, hydrogen, and water.
• In our solar system, the four "gas giants" are Jupiter, Saturn, Neptune, and Uranus.

WHY ARE PLANETS SO BIG?

• The outer planets are extremely large due to the quantity of material in each of them.
• That is, although they are made of light gases, there is a lot of material there.
• On the other hand the densities of the outer planets are low;
• Saturn's is in fact less than that of Plants are used for water

WHAT ARE PLANETS USED FOR?

• many things! First, they are used for food. This is probably their first and foremost reason for existence.
• Also, they have been used for certain medicines.
• Last, let's not forget that they give us the oxygen we breathe!