STAAR Friday Galaxy Review.

What is the shape of the Milky Way galaxy?

• Elliptical

• Spiral

• Irregular

• Ring

Where is our solar system located within the Milky Way galaxy?

• In the galactic core

• In the halo

• In the Orion Arm

• In the Sagittarius Arm

Explain why the Milky Way is classified as a spiral galaxy. Provide evidence to support your reasoning.

• It has a central bulge and spiral arms.

• It is shaped like an ellipse (oval).

• It has no defined shape.

• It is a ring-shaped galaxy.

Describe the process that leads a star to become a red giant.

• The star runs out of hydrogen in its core and starts fusing helium.

• The star explodes in a supernova.

• The star collapses into a black hole.

• The star cools down and becomes a white dwarf.

Tags

NGSS.HS-ESS1-1

What is the final stage of a low-mass star's life cycle?

• Black Hole

• Neutron Star

• White Dwarf

• Red Giant

Compare and contrast the life cycles of low-mass and high-mass stars.

• Both end as black holes.

• Low-mass stars become white dwarfs, while high-mass stars may become neutron stars or black holes.

• Both end as neutron stars.

• Both end as white dwarfs.

What evidence supports the theory that the Milky Way is a spiral galaxy?

• Observations of its spiral arms and rotation curve.

• Its elliptical shape.

• Its irregular shape.

• Its ring-like structure.

Identify the primary factor that determines the life cycle path of a star.

• Its temperature

• Its mass

• Its color

• Its distance from Earth

Tags

NGSS.HS-ESS1-1

How does the mass of a star affect its evolution and eventual death?

• More massive stars have shorter lifespans and may end as black holes.

• More massive stars have longer lifespans and end as white dwarfs.

• Less massive stars become black holes.

• Mass does not affect a star's evolution.

What is the primary composition of a star during its main sequence phase?

• Helium and carbon

• Hydrogen and helium

• Iron and nickel

• Oxygen and nitrogen

Tags

NGSS.HS-ESS1-1