| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.18 |
| Score | 0% | 64% |
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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primary or tertiary consumers |
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secondary consumers or scavengers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
Changes to an object's speed or direction of motion are caused by which of the following?
a force |
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power |
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work |
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kinetic energy |
Force is applied to change an object's speed or direction of motion.
The crust and upper mantle of the earth is called the:
hydrosphere |
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geosphere |
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atmosphere |
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lithosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).
As a cold front moves into an area, the heavier cool air __________ the lighter warm air that it is replacing.
pushes under |
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pushes above |
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cancels out |
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mixes with |
A cold front is a warm-cold air boundary with the colder air replacing the warmer. As a cold front moves into an area, the heavier cool air pushes under the lighter warm air that it is replacing. The warm air becomes cooler as it rises and, if the rising air is humid enough, the water vapor it contains will condense into clouds and precipitation may fall.
A subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. This desribes which of the following?
proton |
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isotope |
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neutron |
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electron |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.