| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
molecule |
|
atom |
|
element |
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compound |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
__________ is caused by a lack of iron in the diet.
anemia |
|
shingles |
|
diabetes |
|
scurvy |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
Which of the following states of matter exists at the lowest temperature?
solid |
|
liquid |
|
gas |
|
none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
50°F is how many °C?
10 |
|
122 |
|
-10 |
|
58 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (50 - 32)\)
\(C° = {5 \over 9} (18)\)
\(C° = {90 \over 9}\)
\(C° = 10\)
Which of the following would you find in the side view mirror of a car?
concave mirror |
|
convex lens |
|
convex mirror |
|
concave lens |
A concave (or converging) mirror bulges inward and focuses reflected light on the mirror's focal point where the mirror's angles of incidence converge. In contrast, a convex (or diverging) mirror bulges outward and diffuses the light waves that strike it. A common use of a concave mirror is in a reflecting telescope, a common use of a convex mirror is in the side view mirror of a car.