| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
In the food chain, omnivores may be which of the following?
secondary or tertiary consumers |
|
secondary consumers or scavengers |
|
primary or tertiary consumers |
|
primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
Which of the following is metamorphic rock?
obsidian |
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marble |
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granite |
|
coal |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.
__________ is caused by a lack of Vitamin C.
diabetes |
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scurvy |
|
shingles |
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anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
When light travels between two substances it bends. This is called:
refraction |
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conduction |
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reflection |
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convection |
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.
Which of the following is not true about simple magnets?
opposite poles repel each other |
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same poles repel each other |
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opposite poles attract each other |
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all of these are untrue |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.