Astronomy 3 Practice

Auroras are frequently seen

• near the equator.
• before a sunspot cycle.
• every 11 years.
• after solar flares.

What protects Earth from solar winds?

• The poles

• The moon's gravity

• The magnetic field and the atmosphere

• The tidal range

What are large loops on the surface of the sun that release a large amount of energy? 

• Corona
• Photosphere
• Sunspiots
• Prominences

This is the only layer seen during a total solar eclipse? 

• Corona
• Photosphere
• Core

When we look at the sun, what layer are we viewing?

• photosphere
• chromosphere
• corona
• convection zone

Areas of gas on the sun's surface that are cooler than gases around them are called:

• corona
• prominences
• sunspots
• solarspots

The sun makes up about _________ percent of the solar system's total mass.

• 98

• 95

• 99.9

• 98.9

What is this

• Prominice
• sun spot
• core
• Earth

Why are sunspots darker than the surrounding areas?

• The hotter gas releases less light
• The Cooler gas releases less light
• They look that way because the light form the sun 
• They are created by shadows from the moon.

How does the sun keep all of the planets in orbit?

• The pull of its gravity
• the flames give it power
• the sun spots
• The solar flares guide them