| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The four planets closest to the Sun are called terrestrial. What does terrestrial mean?
the planets have moons |
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the planets are Earth-like |
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the planets have magnetic fields |
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the planets have water |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
Work is measured in:
joules or newton-meters |
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watts |
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amps |
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horsepower |
Work is performed on an object when an applied force causes displacement along the same vector. Measured in joules (J) or newton-meters (Nm), work is calculated by multiplying force times displacement: \(W = \vec{F}\vec{d}\)
Herbivores are __________ that subsist on producers like plants and fungus.
secondary consumers |
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tertiary consumers |
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scavengers |
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primary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
veins |
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arteries |
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red blood cells |
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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.
Which of the following is not a method of heat transfer?
radiation |
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convection |
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reflection |
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conduction |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.