What is the main sequence stage in the life cycle of a star?

• The stage where a star is born

• The stage where a star spends most of its life

• The stage where a star explodes

• The stage where a star becomes a black hole

Tags

TEKS.SCI.8.9A

Which type of galaxy is characterized by a flat, rotating disk of stars and spiral arms?

• Elliptical galaxy

• Irregular galaxy

• Spiral galaxy

• Lenticular galaxy

Tags

TEKS.SCI.8.9B

What is the amplitude of a wave?

• The distance between two consecutive crests

• The height from the rest position to the crest

• The number of waves that pass a point in one second

• The time it takes for one complete wave to pass a point

Tags

TEKS.SCI.8.8A

Using the Hertzsprung-Russell diagram, how are stars classified?

• By their distance from Earth

• By their brightness and temperature

• By their age and size

• By their chemical composition

Tags

TEKS.SCI.8.9A

Where is Earth's solar system located within the Milky Way galaxy?

• In the galactic center

• In the halo

• In the spiral arms

• In the bulge

Tags

TEKS.SCI.8.9B

What evidence supports the Big Bang theory as the origin of the universe?

• The presence of black holes

• The cosmic microwave background radiation

• The existence of dark matter

• The formation of stars

Tags

TEKS.SCI.8.9C

Compare the frequency of red light to blue light in the electromagnetic spectrum.

• Red light has a higher frequency than blue light

• Red light has a lower frequency than blue light

• Red light and blue light have the same frequency

• Frequency cannot be compared

Tags

TEKS.SCI.8.8A

What is the primary characteristic of an elliptical galaxy?

• It has a well-defined spiral structure

• It has a spherical or oval shape

• It has irregular shapes with no distinct form

• It has a bar-shaped structure

Tags

TEKS.SCI.8.9B

Describe the relationship between wavelength and frequency in a wave.

• As wavelength increases, frequency increases

• As wavelength increases, frequency decreases

• Wavelength and frequency are unrelated

• Wavelength and frequency are always equal

Tags

TEKS.SCI.8.8A

Which of the following is a characteristic of irregular galaxies?

• They have a defined spiral structure

• They have a spherical shape

• They lack a distinct shape

• They have a bar-shaped structure

Tags

TEKS.SCI.8.9B