| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
What kind of weather front is likely to create clouds and storms?
cold front |
|
stationary front |
|
warm front |
|
temperate front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Changes to an object's speed or direction of motion are caused by which of the following?
work |
|
kinetic energy |
|
power |
|
a force |
Force is applied to change an object's speed or direction of motion.
In the classification of life, bacteria, archaea and eukaryota are which of the following?
domains |
|
classes |
|
species |
|
kingdoms |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
When light travels between two substances it bends. This is called:
refraction |
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reflection |
|
conduction |
|
convection |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
|
esophagus |
|
small intestine |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.