Stars Flashcards
What two things do stars give off?
Light and Heat
What two gases are stars made of?
Hydrogen and Helium
What is the process called when hydrogen atoms fuse together to form helium and a star releases energy?
Nuclear Fusion
How are stars formed?
Stars are born in large clouds of dust and gas called nebula (nebulae).
What are the largest stars called?
Supergiants
What are the second largest stars called?
Giants
Medium sized stars are called…
Yellow Dwarf
What are the smallest stars called…
Dwarfs
What size is our sun considered?
Yellow Dwarf (medium sized)
How do astronomers tell how hot stars are?
Astronomers can tell how hot stars are by the colors they see when they look at them through a special telescope.
What color are the hottest stars?
Blue
What color are the second-hottest stars?
White
Stars with average heat are what color?
Yellow
The coolest (coldest) stars are what color?
Red
How are stars classified (named)?
Stars are classified by their size and color.
Be able to identify some of these
What is it called when a star explodes violently and dies?
Supernova
When a star collapses in on itself and dies, it can form a…
Black Hole
Why do large stars appear to be so small in the night sky?
The larger, brighter stars are so far away.
Why does the sun appear to be bigger than distant stars?
It looks bigger because it is so much closer to Earth.
Is the Sun or the Earth at the center of our solar system?
The Sun (Heliocentric)
The sun is the source of most of the _____ on Earth.
energy
The _____ is the only object in our solar system that produces its own _____.
sun
light
