| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
circulation |
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digestion |
|
nervous |
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respiration |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
Which of the following is not true of light waves?
are electromagnetic waves |
|
travel faster than sound waves |
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are mechanical waves |
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can travel through a vacuum |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
convection |
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conduction |
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reflection |
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radiation |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
habitats |
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minerals |
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animals |
|
plants |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
Which of the following describes the Earth's outer core?
solid |
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primarily solid |
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makes up most of the Earth's volume |
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liquid |
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).