| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
day and night cycle |
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the northern lights |
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seasons |
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tides |
Tides are caused by the gravitational interaction of Earth and the Moon.
Which of the following is not true about simple magnets?
same poles repel each other |
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opposite poles attract each other |
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all of these are untrue |
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opposite poles repel each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.
Which of the following states of matter exists at the lowest temperature?
liquid |
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none of these |
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gas |
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solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
capillaries |
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veins |
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red blood cells |
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arteries |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.
Which of these layers is found directly below the Earth's crust?
continents |
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outer core |
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mantle |
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inner core |
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.