| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.80 |
| Score | 0% | 76% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
respiration |
|
digestion |
|
circulation |
|
nervous |
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.
Changes to an object's speed or direction of motion are caused by which of the following?
a force |
|
kinetic energy |
|
work |
|
power |
Force is applied to change an object's speed or direction of motion.
Water freezing or boiling is an example of which of the following?
sublimation |
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heating |
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cooling |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
The dwarf planet Pluto is located where?
between the orbits of Jupiter and Saturn |
|
in the Kuiper Belt |
|
in the asteroid belt |
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outside the solar system |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.
The number system most used in science is the:
British system |
|
American system |
|
English system |
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metric system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.