| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
Water freezing or boiling is an example of which of the following?
heating |
|
cooling |
|
sublimation |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
Sound travels fastest through which of the following media?
air |
|
metal |
|
water |
|
vacuum |
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).
Most digestion takes place where?
mouth |
|
small intestine |
|
large intestine |
|
stomach |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.
In the water cycle, infiltration is most closely related to:
runoff |
|
water table |
|
oceans |
|
rivers |
The water then accumulates as runoff and eventually returns to bodies of water or is absorbed into the Earth (infiltration) and becomes part of the water table, an underground resevoir of fresh water.
Convert 0C° to F°.
0 |
|
-32 |
|
32 |
|
16 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)