| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Which of the following is not a method of heat transfer?
convection |
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conduction |
|
reflection |
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radiation |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
The angle of reflection is equal to which the following?
angle of incidence |
|
refractive index |
|
focal point |
|
90° |
The law of reflection specifies how waves, including light waves, bounce off of surfaces. Specifically, the angle of incidence of the approaching wave is equal to the angle of reflection of the reflected wave as measured from a line perpendicular (90°) to the surface.
Which of the following is not true about simple magnets?
opposite poles attract each other |
|
same poles repel each other |
|
all of these are untrue |
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opposite poles repel each other |
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.
In the food chain, bacteria and fungi convert the organic matter in the dead bodies of plants and animals into simple nutrients. Bacteria and fungi are:
decomposers |
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primary consumers |
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scavengers |
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producers |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
In the metric system, what prefix represents 103?
mega |
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centi |
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milli |
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kilo |
Kilo is the metric system prefix for 103.