- Why is the sun considered a star?
Your answer:
It is made up of burning gases.
It emits light and heat
It has a higher mass than planets, moons, and asteroids.
all of the above
- Constellations are groups of stars in particular regions of the sky. Which of the following is not a constellation?
Your answer:
Cassiopeia
sun
Orion
Pleiades, also known as The Seven Sisters
- Nuclear reactions that give off electromagnetic radiation take place within these objects. Many are visible at night, and they are
Your answer:
stars.
black holes.
nebulae.
planets.
- A black hole is an invisible, highly dense celestial body with gravity strong enough to keep light from escaping. It is called a black hole because
Your answer:
black holes were named after their discoverer, Richard Black.
it is a big, dark hole in space.
it always appears dark, since no light can leave it.
it only attracts black objects.
- What does the universe include?
Your answer:
our solar system and all other solar systems that exist
nine planets, one sun, asteroids, and comets
five solar systems
just our sun
- Stars are classified according to characteristics that can be observed from Earth. Which of the following is not a characteristic for classifying stars?
Your answer:
the star's luminosity, or brightness
the star's color
the star's size
All of these are possible characteristics.
- Although they did not have telescopes, ancient people studied space. What did they observe?
Your answer:
details on planets in far-away galaxies
only the sun and the moon
the changing positions of stars and planets in the sky
all of the above
- The universe is made up of billions of galaxies that seem to be moving away from each other. This is evidence for which theory?
Your answer:
the theory that the universe is expanding in size
the theory that all matter repels (pushes away) other matter
the theory that the universe is shrinking
the theory that the universe has a fixed size
- The Milky Way is made up of stars. It is disk-shaped, but it bulges in the middle where it has many stars. Where is the Milky Way brightest?
Your answer:
in its middle
on its edges
It has the same brightness throughout.
It's not bright at all.
- Galaxies are made up of billions of stars, all giving off light, but many galaxies can only be seen with powerful telescopes. What is a possible reason for this?
Your answer:
They are so far away from Earth that their light is very faint.
They are made up of only small stars.
They are in motion, so they are harder to see.
The space around them is darker than normal space.