| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
Which of the following is not true of light waves?
can travel through a vacuum |
|
are electromagnetic waves |
|
travel faster than sound waves |
|
are mechanical waves |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
A biological community of interacting organisms and their physical environment is known as:
community |
|
ecosystem |
|
biome |
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population |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
small intestine |
|
stomach |
|
mouth |
|
large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is the correct order for types of radiation from longest to shortest wavelength?
microwaves → radio waves → visible light |
|
visible light → ultraviolet light → radio waves |
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infrared waves → microwaves → ultraviolet light |
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radio waves → visible light → gamma rays |
The electromagnetic spectrum covers all possible wavelengths and frequencies of radiation. From lowest frequency (longest wavelength) to highest frequency (shortest wavelength) radiation: radio waves → microwaves → infrared waves → visible light → ultraviolet light → X-rays → gamma rays.
Which of these is not a phase in cell division?
megaphase |
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anaphase |
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cytokinesis |
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interphase |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.