Unit 2 - Earth Science - Midterm Review

Which statement best describes the relationship between Earth and the Milky Way Galaxy?

• Earth is billions of light-years away from the Milky Way Galaxy.
  
• Earth is part of a galaxy that is nearest to the Milky Way Galaxy.
  
• Earth is located in the Milky Way Galaxy but far from the galaxy center.
  
• Earth is positioned in the center of the Milky Way Galaxy.
  

Which statement best describes the motion of the Earth around the Sun?

• The speed of Earth is constant regardless of its distance from the Sun.
• The speed of Earth is constant because the distance remains the same between Earth and the Sun.
• Speed increases the farther Earth is from the Sun and decreases the closer it is to the Sun.
• Speed increases the closer Earth is to the Sun and decreases the farther it is from the Sun.
  

If it is summer in the northern hemisphere, which statement is true?

• Earth has changed the tilt of its axis by 20 degrees due to its revolution. 
• It is winter in the southern hemisphere due to the tilt of Earth’s axis. 
• It is summer in the southern hemisphere due to the tilt of Earth’s axis. 
• Earth has reached its closest point to the sun due to its revolution. 
  

How does a straight alignment between Earth, the sun, and the moon impact the tides on Earth?

• It produces the greatest change in high and low tides.
• It produces the least change in high and low tides. 
• It produces semidiurnal tides. 
• It produces diurnal tides.
  

How does heat from the sun get to Earth? 

• By radiation, using electromagnetic waves to transfer the heat. 
• By convection, using liquids and gases to transfer the heat. 
• By conduction, using solids to transfer the heat. 
• By absorption, using primary waves to transfer the heat. 
  

Why do green plants require solar energy? 

• To produce their own food.
• To absorb nitrogen into their roots. 
• To release carbon dioxide into the atmosphere. 
• To decompose the dead or decaying remains of animals. 
  

Just as biologists classify living things, astronomers classify galaxies. What feature is used to classify galaxies?

• Size
• Shape
• Color
• Brightness

The location of our solar system is illustrated in the diagram of the Milky Way Galaxy.

Which conclusion can be reached by the location of our solar system? 

• Our sun is near the end of its star cycle.
• Our solar system has the only planets in the galaxy.
• Our solar system is surrounded by newly formed stars.
• Our sun will be pushed away from the galaxy.

In which structure is the Sun located?

• Milky Way Galaxy
• Andromeda Galaxy
• Cat's Eye Nebula
• Horseshoe Nebula

A student observes a glowing band across the night sky. This glowing band is most likely

• Orbiting planets in the solar system.
• A partial view of the Milky Way Galaxy.
• An asteroid orbiting the Sun.
• Light from stars in a distant galaxy.