EARTH’S CYCLE

1. What is a geo-exchange system primarily used for?
                              
                          

• a. Generating electricity from wind

• b. Heating and cooling buildings      

• c. Storing solar energy

•   d. Producing fossil fuel

What principle allows geo-exchange systems to function effectively?
           
           
           
          

• a. The Earth’s stable underground temperature

• b. The constant flow of surface air

• c. The rising heat of the sun

•   d. The movement of ocean tides

3. At what depth is the Earth’s temperature typically stable enough for geo-exchange use?
                                                        
                                                  

•     a. 1–2 meters 

•    b. 3–5 meters    

• c. 6–10 meters

•      d. 50–100 meter

4. Why is geothermal energy considered renewable?
         
       
          
           

•    a. It can be used only once

•      b. The Earth constantly regenerates the heat

•    c. It relies on fossil fuels

• d. It requires burning biomass

5. Why is geothermal energy considered sustainable?
           
          
           
         

• a. It is free of carbon emissions and doesn’t deplete resources

•   b. It can only be used in volcanic areas

• c. It requires large amounts of fuel

•    d. It produces high levels of waste

6. Which heating method provides warmth directly to the floor and objects in a room?
                                            
                                     

• a. Forced-air heating   

• b. Radiant in-floor heating     

•    c. Geothermal venting

• d. Solar panel heating

7. Which heating method circulates heated air through ducts?
                                                
                                     

• a. Radiative cooling   

•     b. Radiant in-floor heating  

• c. Passive solar heating

• d. Forced-air heating

8. How can geo-exchange systems provide both heating and cooling?
                  
             
            

         

•  a. By switching to solar panels in summer

• b. By burning natural gas

•   c By reversing the flow of heat in the system

•      d. By using multiple furnaces

9. How does a geo-exchange system produce domestic hot water?
             
             
             
             

• a. By using separate gas boilers

• b. By capturing excess heat from the system

• c. By converting steam into water

• d. By relying on solar thermal collectors

10. Why are geo-exchange systems more energy-efficient than traditional HVAC systems?
             
             
            
            

• a. They use fossil fuels more efficiently

• b. They work with electricity only

•   c. They transfer heat instead of generating it

•   d. They operate only in mild climates