| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.90 |
| Score | 0% | 58% |
Meteoroids, meteors and meteorites are categorized based on which of the following?
their location |
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their size |
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their density |
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their temperature |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Which of the following is the smallest component of an element that still retains the properties of the element?
atom |
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neutron |
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element |
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molecule |
An atom is the smallest component of an element that still retains the properties of the element.
Which of the following is true about species groups?
a community is made up of a group of populations |
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a population is made up of a group of communities |
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a biome is a made up of a group of biospheres |
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an ecosystem is a biological population |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.
Which of the following members of the food chain are most alike?
primary consumers and omnivores |
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producers and tertiary consumers |
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scavengers and decomposers |
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herbivores and autotrophs |
Like decomposers, scavengers also break down the dead bodies of plants and animals into simple nutrients. The difference is that scavengers operate on much larger refuse and dead animals (carrion). Decomposers then consume the much smaller particles left over by the scavengers.
In the metric system, what prefix represents 10-3?
milli |
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kilo |
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mega |
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centi |
In the metric system, milli is the prefix for 10-3.