| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
Menstruation occurs when:
the fetus is formed |
|
the zygote is formed |
|
the ovum becomes fertilized |
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the ovum fails to become fertilized |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
reactants |
|
ions |
|
products |
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isotopes |
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.
Cellular fermentation takes place:
anaerobically |
|
in the presence of oxygen |
|
in plant cells |
|
aerobically |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their location |
|
their density |
|
their temperature |
|
their size |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Convert 0C° to F°.
0 |
|
-32 |
|
16 |
|
32 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)