| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
Which of the following is the formula for work?
\(W = \vec{F}\vec{d}\) |
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\(W = {F}{d}\) |
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\(W = {{F}\over{d}}\) |
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\(W = {\vec{F} \over \vec{d} }\) |
Work is performed on an object when an applied force causes displacement along the same vector. Measured in joules (J) or newton-meter (Nm), work is calculated by multiplying force times displacement: \(W = \vec{F}\vec{d}\)
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
results |
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products |
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side effects |
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reactants |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
A large naturally occurring community of flora and fauna occupying a major habitat is:
a biome |
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a population |
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a food chain |
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a community |
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 is the correct order for types of radiation from lowest to highest frequency?
microwaves → radio waves → visible light |
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visible light → ultraviolet light → radio waves |
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infrared waves → microwaves → ultraviolet light |
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radio waves → visible light → gamma rays |
The electromagnetic spectrum covers all possible wavelengths and frequencies of radiation. From lowest frequency (longest wavelength) to highest frequency (shortest wavelength) radiation: radio waves → microwaves → infrared waves → visible light → ultraviolet light → X-rays → gamma rays.
Earth's troposphere layer is which of the following?
coldest |
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farthest from the surface |
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closest to the surface |
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hottest |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.