| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
isotopes |
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reactants |
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products |
|
ions |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
A transition zone between two air masses is called:
front |
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fog |
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thunderstorm |
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boundary |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
Which of the following is not a method of heat transfer?
reflection |
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radiation |
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conduction |
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convection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
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the northern lights |
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day and night cycle |
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tides |
Tides are caused by the gravitational interaction of Earth and the Moon.
Examples of secondary consumers include:
grasshoppers |
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plankton |
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chickens |
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wolves |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.