| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.71 |
| Score | 0% | 74% |
Which of these layers is found directly below the Earth's crust?
inner core |
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continents |
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outer core |
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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.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a food chain |
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a biome |
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a population |
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a community |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
proton |
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electron |
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atom |
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neutron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Which of the following is the narrowest classification of life?
domain |
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family |
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species |
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genus |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
Which of blood component allows blood to clot?
red blood cells |
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plasma |
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platelets |
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white blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.