| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
In the metric system, what prefix represents 103?
mega |
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milli |
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kilo |
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centi |
Kilo is the metric system prefix for 103.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
atom |
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molecule |
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compound |
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element |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Which of the following is not true about mass and weight?
mass depends on the location where it is measured |
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mass is the amount of matter something has |
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weight is the force exerted on an object by gravity |
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weight depends on the location where it is measured |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.
Which of blood component fights infection?
plasma |
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platelets |
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white blood cells |
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red 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.
Which is the proper order of Earth's atmospheric layers from the surface up to space?
mesosphere, thermosphere, stratosphere, troposphere |
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troposphere, stratosphere, mesosphere, thermosphere |
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thermosphere, mesosphere, stratosphere, troposphere |
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stratosphere, troposphere, mesosphere, thermosphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.