| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.86 |
| Score | 0% | 57% |
Examples of secondary consumers include:
wolves |
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chickens |
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plankton |
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grasshoppers |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.
Which of the following describes the Earth's outer core?
liquid |
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solid |
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makes up most of the Earth's volume |
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primarily solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
arteries |
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red blood cells |
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veins |
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capillaries |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.
Changes to an object's speed or direction of motion are caused by which of the following?
power |
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a force |
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work |
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kinetic energy |
Force is applied to change an object's speed or direction of motion.
In the metric system, what prefix represents 10-3?
centi |
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mega |
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milli |
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kilo |
In the metric system, milli is the prefix for 10-3.