| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Sound travels fastest through which of the following media?
metal |
|
air |
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vacuum |
|
water |
The speed of a sound wave will vary with the medium. Sound travels fastest through media that has particles that are very close together, like metal. Thus, it travels faster through water than through air and doesn't travel at all through a vacuum (there are no particles in empty space to vibrate).
Which of the following is not a method of heat transfer?
radiation |
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reflection |
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convection |
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conduction |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
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:
scavengers |
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decomposers |
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primary consumers |
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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.
Convert 0C° to F°.
-32 |
|
16 |
|
32 |
|
0 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)
Which of the following is the smallest component of an element that still retains the properties of the element?
neutron |
|
atom |
|
element |
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molecule |
An atom is the smallest component of an element that still retains the properties of the element.