| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.94 |
| Score | 0% | 79% |
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
electron |
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proton |
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neutron |
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atom |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
The number system most used in science is the:
British system |
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English system |
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American system |
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metric system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
What type of cloud is responsible for fog?
cumulonimbus |
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cumulus |
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cirrus |
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stratus |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
An air mass is a large body of air that has which of the following characteristics?
all of these |
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similar temperature |
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similar moisture |
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similar density |
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.
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 4 is:
basic |
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neutral |
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acidic |
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alkaline |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.