| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
The ozone layer is in which of Earth's atmospheric layers?
troposphere |
|
mesosphere |
|
thermosphere |
|
stratosphere |
The stratosphere is just above the troposphere and is stratified in temperature with warmer layers higher and cooler layers closer to Earth. This increase in temperature is a result of absorption of the Sun's radiation by the ozone layer.
Herbivores are __________ that subsist on producers like plants and fungus.
secondary consumers |
|
tertiary consumers |
|
scavengers |
|
primary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
Plant cells are surrounded by:
only a cell wall |
|
only a cell membrane |
|
a cell membrane and a cell wall |
|
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.
Which of the following is the formula for power?
\(P = {\vec{w} \over t}\) |
|
\(P = w t\) |
|
\(P = \vec{w}t\) |
|
\(P = {w \over t}\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
The angle of reflection is equal to which the following?
focal point |
|
angle of incidence |
|
90° |
|
refractive index |
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.