| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
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.
In cell biology, what part of the cell contains organelles?
nucleus |
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cell wall |
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cytoplasm |
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cell membrane |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of protons + neutrons in the nucleus |
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number of electrons orbiting the nucleus |
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number of neutrons in the nucleus |
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number of protons in the nucleus |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 4 is:
alkaline |
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basic |
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acidic |
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neutral |
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.
The crust and upper mantle of the earth is called the:
geosphere |
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atmosphere |
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lithosphere |
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hydrosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).