Earth's Spheres: Random Facts

15 Points Per Correct Answer - No time limit  

1. The Core: What is it made up of? gas mercury silver and copper nickel and iron

2. Mantle: What's the lower limit of the mantle? 3700 km 2900 km 1300 km 2100 km

3. Asthenosphere: What is its major role? it generates heat it protects Earth from earthquakes it supports the Earth's crust it is rich in minerals

4. Lithosphere: What does "lithos" mean in Greek? layer hot hard rock

5. The Crust: What discontinuity delimits it from the mantle? Jeffreys Gutenberg Repetti Mohorovicic

6. Hydrosphere: Which of the following is not a part of the hydrosphere? they are all components of the hydrosphere glaciers underground water water vapors

7. Biosphere: Which of the following does not belong to it? plants fungi animals the soil

8. Atmosphere: What percent of the atmosphere is made up of nitrogen and oxygen? 99% 90% 85% 95%

9. Homosphere: According to what criterion is the atmosphere divided into the homosphere and the heterosphere? mass composition temperature density

10. Heterosphere: At what approximate height does this layer start? 55 km 15 km 80 km 40 km

11. Troposphere: What percent of the atmospheric mass is concentrated in this region? 50% 90% 70% 99%

12. Stratosphere: Which type of radiation can get through the ozone layer situated within this atmospheric region? ultraviolet radiations infrared radiations Roentgen radiations cosmic radiations

13. Mesosphere: Which of the following can be associated with this layer? burning meteors the ozone layer auroras solar winds

14. Thermosphere: What is this layer also known as? Antroposphere Magnetosphere Ionosphere Cryosphere

15. Exosphere: Which of the following is true about this outermost atmospheric layer? it concentrate 10% of the atmospheric mass its temperature is higher than the thermosphere's radio waves are reflected back to Earth from this layer satellites orbit in this layer