Question

practice 5: match the terms with the correct description
a. spiral galaxy
b. milky way galaxy
c. galaxy cluster
d. galaxy

1. groups of stars, gas and dust held together by gravity. may contain over 100 million stars, their planets, moons, comets and asteroids.
2. a pinwheel shaped galaxy where stars revolve around the center. younger stars in the arms, older in near the center.
3. our own galaxy. shaped like a spiral with a supermassive black hole at the center.
4. group of hundreds or thousands of galaxies held together by gravity.

final practice: select all that apply.

1. what does the universe contain?

a. different types of stars and their solar systems
b. black holes
c. galaxies containing millions and billions of stars
d. dark matter and dark energy
e. the earth and moon
essential question: what are some of the objects found in space and their characteristics?

Explanation:

1. A galaxy is a group of stars, gas, and dust held together by gravity and can contain over 100 million stars along with other celestial bodies.
2. A spiral galaxy has a pin - wheel shape with younger stars in the arms and older ones near the center.
3. The Milky Way is our own spiral - shaped galaxy with a supermassive black hole at its center.
4. A galaxy cluster is a group of hundreds or thousands of galaxies held together by gravity.

For the final practice, the universe contains different types of stars and their solar systems, black holes, galaxies with millions and billions of stars, dark matter and dark energy, and the Earth and Moon.

Answer:

Practice 5:

1. D. Galaxy
2. A. Spiral Galaxy
3. B. Milky Way Galaxy
4. C. Galaxy Cluster

Final Practice:

1. A. Different types of stars and their solar systems

B. Black holes
C. Galaxies containing millions and billions of stars
D. Dark matter and dark energy
E. The Earth and Moon