Lesson 3 Flashcards
What is the sun made of?
Hydrogen and helium
What is a sunspot?
Dark spot on the surface of the sun
What are solar flares?
Red streams and loops that are gases that shoot out from the sun
How long do sunspots and solar flares last?
A few days
Which color star is the hottest?
Blue
Which color star is the coolest?
Red
Which best describes the sun?
Medium-sized star
What are the 2 ways in which people classify groups of stars?
Constellations and galaxies
What is a galaxy?
A huge system of gases, dust and stars
What galaxy does our solar system belong to?
Milky Way
What is the shape of our galaxy?
Spiral
Why do constellations seem to change their locations?
Earth is moving, but the stars are not
What is a star?
A huge ball of superheated gasses
What is a constellation?
A group of stars that form and an imaginary picture in the sky
Define what the sun is?
It’s a star that is at the center of our solar system. It’s medium is yellow
What is a universe?
Everything that exist in space
Constellations always change their locations in the sky. True or false?
False
Sunspots and solar flares only last a few days.
True or false?
True
The sun is the largest star. True or false?
True
A long time ago, stars helped people with direction.
True or false?
True
All galaxies are shaped the same.
True or false?
False
List the two gases that mostly make up the sun.
Hydrogen and helium
Name two ways that people classify stars.
Constellations and galaxies
Name a constellation.
Big Dipper
