General Science- The Sun & The Planets etc. Flashcards
The sun is classified as WHAT kind of star? 2 terms.
G2V or Yellow Dwarf
How hot are G2 stars on the surface?
Approximately 6,000 Celsius
What color are G2 stars?
Yellow
What are the charges of the metals that G2 stars consist of?
Neutral
What do G2 stars normally consist of?
Iron
Magnesium
Calcium
What do V’s indicate for stars?
That it is a dwarf star or significantly smaller.
What is the estimated age of the sun and is it older than the earth?
4.7 billion years and yes.
What percentage of mass does our sun contain in the entire solar system?
Around 99.9 percent
Stars consist of what?
Gigantic balls of superheated plasma.
How are stars kept so hot?
Atomic reactions emanating from its center.
What is the temperature at the core of the sun?
15 million Celsius
Temperatures on the surface of the sun range between what?
4,000 to 15000 Celsius
The diameter of the sun is about how many kilometers?
1.4 million kilometers
The diameter of the sun is by comparison to the earth how many times?
Over 100 times.
The surface area of the sun is how many times greater than the earth’s surface area?
12,000 times
The four planets closest to the sun are named what?
Mercury
Venus
Earth
Mars
The four planets closest to the sun are WHAT kind of planets?
Terrestrial Planets
What makes terrestrial planets?
Based on their similar compositions to Earth’s composition.
What are the compositions of terrestrial planets?
Inner Metal Cores
Rock Surfaces
Which 2 terrestrial planets have moons of their own?
Earth
Mars
Which planet is the largest of the terrestrial planets?
Earth
Which other four planets are considered Outer Planets?
Jupiter
Saturn
Uranus
Neptune
Which was once considered a planet but not anymore?
Pluto
What do the outer planets have?
Rings
