1 |
The core of the earth is mostly composed of ehat element? |
oxygen
iron
silicon
magnesium
|
2 |
What is the term for the removal of groundwater from an aquifer? |
discharge
desorption
retardation
base-load
|
3 |
Oceans cover how much of the earth's surface? |
71 percent
75 percent
70 percent
76 percent
|
4 |
What is the distance to the center of the earth? |
3,281 miles
3,958 miles
4,254 miles
2,946 miles
|
5 |
How many miles is the circumference of the earth around the poles? |
25,416
25,622
24,804
24,496
|
6 |
What is the equatorial circumference of Earth? |
41,040 km (25,504 m)
40, 070 KM (24, 903 M)
40,800 km (25,353 m)
35,620 km (22,134 m)
|
7 |
Naturally occurring molten rock material generated and found within the Earth. |
magma
lgneous rock
lava
sedimentary
|
8 |
Which of these 'break-ups' occur during cenozoic era? |
india separated from Africa
greenland separated from europe
australia separated from antarctica
all of them
|
9 |
Wwhen did paleozoic era begin? |
2000 million years ago
540 million years ago
4 billion years ago
195 million yares ago
|
10 |
The deepest depression on the Earth is |
puerto rico trench
eurasia basin
java trench
marianas trench
|