cumulus (means “heap”) clouds
The thin, wispy clouds that look like feathers or curls of hair are called
Cirrus (means “curl”) clouds
Thick low clouds that cover the sky are called stratus (means “layer”) clouds
Nimbo or nimbus means “rain”
Cumulonimbus clouds are dark towering clouds
Alto is a word pattern that means “high”
СHAPTER 12
The sun is at the center of solar system
The universe includes all of space and all the matter and energy in it
The study of the universe and all the objects in it is a science is astronomy
Scientists who study the universe are called astronomers
The distance that light travels in 1 year is known as a light-year
The measure of the brightness of a star as seen from the earth is known
as magnitude
A cloud of dust and gas found in space is called a nebula
A red giant is a star that is many times larger than the sun
After a while a red giant begins to collapse into a smaller star. It becomes
hotter and appears white in color. A small star in this stage is called is called
a white dwarf
Once most of a star’s fuel is gone, it will enter the last stage of its life.
The star will become a black dwarf
Stars that collapse into white dwarf stage sometimes explode and become
very bright. An exploding star of this type is called a nova
Sometimes a very large star may explode violently. Then it is called
a
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