| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
Which of the following is the primary difference between a comet and an asteroid?
comets have an atmosphere |
|
asteroids have a coma |
|
asteroids contain frozen water |
|
comets orbit the Sun |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
|
stomach |
|
esophagus |
|
small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
In cell biology, what part of the cell contains organelles?
cell wall |
|
cell membrane |
|
cytoplasm |
|
nucleus |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
The heat from the Sun traveling to Earth is an example of which of the following?
conduction |
|
radiation |
|
electricity |
|
convection |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
ground level |
|
high-altitude |
|
mid-altitude |
|
low-altitude |
Cirrus clouds are thin, wispy high-altitude clouds composed of ice crystals that originate from the freezing of supercooled water droplets. Cirrus clouds generally occur in fair weather and point in the direction of air movement at their elevation.