Astronomy Unit test review

Front

What is the initial stage of a star's life cycle?

Back

All stars begin their life as a nebula, not a white dwarf.

Front

Define 'Waxing' in relation to the Moon.

Back

Waxing refers to the phase of the Moon when it is increasing in illumination, making the lighted part appear to grow.

Front

What is the estimated age of the universe?

Back

The age of the universe is approximately 14 billion years.

Front

What happens to stars as you move left on the Hertzsprung-Russell diagram?

Back

As you move to the left on the Hertzsprung-Russell diagram, stars get hotter.

Front

Which type of electromagnetic wave has the longest wavelength?

Back

Radio waves have the longest wavelength and therefore the lowest frequency and energy.

Front

What is a white dwarf?

Back

A white dwarf is a small, dense star that is the remnant of a star that has exhausted its nuclear fuel.

Front

What is the significance of the Hertzsprung-Russell diagram in astronomy?

Back

The Hertzsprung-Russell diagram is used to classify stars based on their luminosity, color, temperature, and evolutionary stage.

Front

What is the difference between 'Waxing' and 'Waning' phases of the Moon?

Back

Waxing phases are when the Moon's illumination increases, while waning phases are when the illumination decreases.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages: nebula, main sequence, red giant, and then either a white dwarf, neutron star, or black hole.

Front

What is the relationship between wavelength and frequency in electromagnetic waves?

Back

Wavelength and frequency are inversely related; as wavelength increases, frequency decreases.