7.1 & 7.2 Exam Review

Front

What is the term for galaxies that are moving away from us in space?

Back

red-shift

Front

What do the largest stars start to fuse when they run out of hydrogen in the core?

Back

helium to carbon

Front

What phenomenon causes wavelengths to shrink when the source is coming toward you, or expand when it is moving away?

Back

Doppler Effect

Front

What is a particle of light called?

Back

photon

Front

What are Galileo's contributions to astronomy?

Back

discovery of sunspots on the sun, the four moons of Jupiter, the moon's surface has craters.

Front

What is Hubble's Law?

Back

The observation that the farther away a galaxy is, the faster it is moving away from us.

Front

What is the main component of stars during the main sequence phase?

Back

hydrogen

Front

What is the process called when a star exhausts its hydrogen and begins to fuse helium?

Back

Helium burning

Front

What is the significance of the Doppler Effect in astronomy?

Back

It helps determine the movement and speed of celestial objects.

Front

What is the difference between red-shift and blue-shift?

Back

Red-shift indicates an object is moving away, while blue-shift indicates it is moving closer.