| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
When light travels between two substances it bends. This is called:
reflection |
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conduction |
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convection |
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refraction |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
As part of digestion, the liver produces bile which breaks down:
fat |
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protein |
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sugars |
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starches |
The liver produces bile which emulsifies (separates) fat.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
neutron |
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proton |
|
atom |
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electron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Poor balance could indicate an issue with which part of the nervous system?
medulla |
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cerebrum |
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spinal cord |
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cerebellum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Earth's history is divided into time periods, which of these is the shortest time period?
epoch |
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period |
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age |
|
eon |
The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.