| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
day and night cycle |
|
the northern lights |
|
seasons |
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tides |
Tides are caused by the gravitational interaction of Earth and the Moon.
As part of digestion, the liver produces bile which breaks down:
starches |
|
fat |
|
sugars |
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protein |
The liver produces bile which emulsifies (separates) fat.
In the metric system, what prefix represents 103?
milli |
|
mega |
|
kilo |
|
centi |
Kilo is the metric system prefix for 103.
Earth's troposphere layer is which of the following?
hottest |
|
farthest from the surface |
|
closest to the surface |
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coldest |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
Which of these layers is found directly below the Earth's crust?
outer core |
|
continents |
|
inner core |
|
mantle |
The crust is the Earth's outermost layer and is divided into oceanic and continental types. Oceanic crust is 3 miles (5 km) to 6 miles (10 km) thick and is composed primarily of denser rock. Continental crust is 20 to 30 miles (30 to 50 km) thick and composed primarily of less dense rock. The crust makes up approximately one percent of the Earth's total volume.