| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
Which of the following states of matter exists at the highest temperature?
liquid |
|
none of these |
|
gas |
|
solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
In which type of compound does one atom borrow an electron from another atom?
chemical |
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ionic |
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covalent |
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acidic |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
animals |
|
habitats |
|
plants |
|
minerals |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
The hottest of Earth's atmospheric layers is which of the following?
thermosphere |
|
troposphere |
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mesosphere |
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stratosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
Which of blood component fights infection?
white blood cells |
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plasma |
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platelets |
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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.