The Planets of Our Solar System - The Inner Planets
They also estimate that it takes about ___ to ___ _____ years for our solar system to make one orbit the Milky Way.
200 250 million
Scientists believe our solar system is about ___ to ___ ____ light years from the center of our galaxy.
25 30 thousand
Our sun and solar system formed about _____ billion years ago.
4.7
The sun contains _____ % of all the material in the solar system.
99.86
The process of gas and dust swirling together over time to form suns and planets is called _____.
Accretion
The large area between Mars and Jupiter full of dust and rocks is called the ___ ____.
Asteroid Belt
Other objects found in our solar system orbiting the sun are?
Comets
When an accreting star gains enough mass, it reaches ____ _____.
Critical Mass
The Latin word terra means ____- _____ in English.
Earth - Like
As far as scientists know, there are no other solar systems in the galaxy. True or False
False
When critical mass is attained, the star begins to _____, or change hydrogen into Helium, and begins emitting light and heat called _____.
Fuss Sunshine
The outer planets are also called ___ ____.
Gas Giant
This enormous mass causes the sun to influence everything in the solar system with a force called ____.
Gravity
Mercury is always portrayed with wings on his feet to indicate...
He could move between the world and heaven very quickly.
A molecular cloud contains mostly ____ ____, and ____.
Hydrogen Gas and Dust
Jupiter and Saturn are composed almost entirely of the gases ____ and ____.
Hydrogen and Helium
Uranus and Neptune are also called ____ ____, because they are composed of mostly ___, ____ and _____.
Ice Giants water, ammonia and methane
The planet Mercury seems to move faster across the sky than the other planets because...
Its orbit closer to the sun
Sometimes they are called ____ planets after the planet ____.
Jovian Jupiter
The four outer gas giant planets in order from closest to the sun are:
Jupiter, Saturn, Uranus, and Neptune
The suns gravitational influence extends far out to the ___ ___.
Kuiper Belt
The smallest planet in our solar system is called ____.
Mercury
The four small inner planets in order from closest to the sun are:
Mercury, Venus, Earth and Mars.
The eight planets of our solar system, in order from the sun outward are named:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
The galaxy in which our solar system is found is called the ____ _____.
Milky Way.
The solar system formed from a large ____ _____.
Molecular Cloud
We will learn about the ____, _____ _____ and ___ in this unit of study.
Moons, dwarf planets and TNO.
Four examples of systems include:
Numerical System, Digestive System, Geographical System and Highway System.
Mercury got its name from the _____ god who is called the ___ of the ____.
Roman messenger of the gods
All of the inner, terrestrial planets are made of ____ rocks.
Silicate
A group of many different kinds of objects related to a star or stars is called a ____ _____.
Solar System
The Latin word for sol means ____ in English.
Sun
The word solar refers to the _____, our ___ ____.
Sun personal star
A group of parts or things that form a whole is called a ____.
System
The inner planets are also called the _____ planets.
Terrestrial
Since stars fuse hydrogen into helium (fusion), why don't Jupiter and Saturn create starlight in the same manner?
They are not large enough, they don't have enough to do that.
Do you believe that mankind will one day discover some kind of life on other planets in other solar systems?
Yes
In Addition to our sun, the gas and the dust in the ancient accretion disc also formed all of the _____, _____, _____ and ______.
planets, mass, asteroids and comets.