Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
Diameter at equator |
12,755 km^2 |
|
|
Diameter at poles |
12,712 km^2 |
|
|
mean diameter of earth |
12,734 km |
|
|
equatorial radius of earth |
6377km |
|
|
total surface area of earth |
510,100,500 km^2 |
|
|
land area |
(29.08%) 148,950,800 km^2 |
|
|
water area |
(70.92%) 361,149,700 km^2 |
|
|
mass |
6.0×10^24 kg |
|
|
mean depth of hydrosphere |
3,554m |
|
|
mean distance from sun |
149,407,000 km |
|
|
approx age of earth |
4500 million years |
|
|
rotation on its own axis |
23 h, 56 min, 409 sec |
|
|
period of revolution arround sun |
365 days, 5 h, 48 min, 45.51sec |
|
|
Highest point of earth surface |
Mt.everest (8,848m above sea level) |
|
|
Lowest point of earth surface |
Shores of dead sea (israel,jordan) 369m below sea level) |
|
|
Deepest part in ocean |
Pacific ocean (mariana's trench east of philippines) 10,900m below sea level |
|
|
Density of core |
13.09g/cm^3 |
|
|
Temp of core |
4500°C |
|
|
Composition: O |
46.5% |
|
|
silicon |
27.72% |
|
|
Aluminium |
8.13% |
|
|
Iron |
5.01% |
|
|
Calcium |
3.63% |
|
|
sodium |
2.85% |
|
|
potassium |
2.62% |
|
|
magnesium |
2.09% |
|
|
other elements |
1.41% |
|
|
earth atmosphere N2 |
78% |
|
|
EA: O2 |
21% |
|
|
EA: other |
1% |
|
|
Avg temp |
+25°C |
