8th Grade Astronomy Unit Review

Front

Which of the following terms is used to refer to a stage in the life cycle of a star? frequency, nebula, luminosity, magnitude

Back

nebula

Front

True or False:  Planets, stars, and comets are all objects that orbit our Sun. 

Back

False- only planets & comets can orbit the Sun

Front

A star's brightness is directly dependent on the star's what?

Back

The size of the star- the biggest stars are the brightest.

Front

True or False: Scientist can determine the size of a galaxy by the number of light years away from Earth it is.

Back

False- bc size is determined by measuring its diameter in light years

Front

Which of the following is a TRUE statement: Our Sun is the center of our galaxy, Our Sun is located on the very outside of our galaxy, Our Sun is on one of the arms in our galaxy that is approximately 2/3 away from its center, Our Sun is on one of the arms in our galaxy that is closer to its center

Back

Our Sun is on one of the arms in our galaxy that is approximately 2/3 away from its center

Front

Ultraviolet, Infrared, & visible light are examples of __________ being emitted by our Sun.

Back

radiation

Front

Light years are most helpful to scientists when they are measuring what?

Back

The distances between objects in space

Front

True or False:  When scientists see visible light from a supernova, they can determine when it occurred by measuring its distance away from earth in light years. 

Back

True- its distance away in light years = how long ago it exploded

Front

Which of the following is true about nuclear fusion? Options: Occurs at the center of stars & produces energy, Occurs in the process of chemical reactions, Results in the creation of black holes, Occurs when 2 stars collide

Back

Occurs at the center of stars & produces energy

Front

Determining a star's mass identifies the star's current what?

Back

life cycle