The Importance of Trees

15 Points Per Correct Answer - No time limit  

1. Trees may help reduce the effects of global warming by: losing their leaves in Winter increasing oxygen concentration in the atmosphere reducing carbon dioxide concentrations in the atmosphere providing shade from UV rays

2. What two main substances do trees need to live? trees absorb oxygen and water trees only need sunlight trees absorb nutrients and water from the soil trees absorb carbon dioxide and water

3. The amount of carbon dioxide a tree may remove from the atmosphere to gain one pound is: about 3 pounds about 0.5 pounds about 1.5 pounds about 10 pounds

4. What is one of the byproducts of photosynthesis? sap oxygen shade compost

5. The water vapor given off by a tree becomes a critical part of Earth's ______________. hydrogen cycle hydrologic cycle carbolic cycle cloud cycle

6. What element is used from the absorbed water to make the chemical energy for a tree? nutrients oxygen hydrogen carbon dioxide

7. Trees are sometimes called ...? the stomach of the world the lungs of the world the shady part of the world the harvest of the world

8. Approximately how much of the original forests have disappeared? one third quarter half three quarters

9. The oldest living organism in North America happens to be a rugged tree. This tree is the? Douglas Fir Giant Redwood Gingko Biloba Bristlecone Pine.

10. What is the science of dating through tree-ring growth called? Eldology Ringchronology Dendrochronology Arborology