| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
212°F is how many °C?
-100 |
|
\(135 {5 \over 9}\) |
|
100 |
|
0 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)
An asteroid belt holds many of the asteroids in our solar system. It is located between the orbits of which planets?
Mercury and Venus |
|
Mars and Earth |
|
Mars and Jupiter |
|
Jupiter and Saturn |
The solar system also contains over a million rocky fragments of at least 1km in diameter called asteroids as well as millions more with smaller diameters. Many of these asteroids are an asteroid belt between the orbits of Mars and Jupiter.
Plant cells are surrounded by:
only a cell wall |
|
a cell membrane and a cell wall |
|
only a cell membrane |
|
neither a cell membrane nor a cell wall |
Animal cells are surrounded by a semipermeable membrane which allows for the transfer of water and oxygen to and from the cell. In plant cells, the cell membrane is surrounded by a somewhat rigid cell wall which provides the cell structure and support.
Veins carry blood __________ the heart.
away from |
|
all of these |
|
within |
|
back to |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
electron |
|
proton |
|
neutron |
|
atom |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.