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 absorb carbon dioxide and water trees absorb nutrients and water from the soil trees only need sunlight

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

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

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

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

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

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

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