| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
The angle of reflection is equal to which the following?
angle of incidence |
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90° |
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focal point |
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refractive index |
The law of reflection specifies how waves, including light waves, bounce off of surfaces. Specifically, the angle of incidence of the approaching wave is equal to the angle of reflection of the reflected wave as measured from a line perpendicular (90°) to the surface.
The heat from the Sun traveling to Earth is an example of which of the following?
convection |
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electricity |
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radiation |
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conduction |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
Which of these is not a component of blood?
white blood cells |
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marrow |
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plasma |
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red blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
compound |
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element |
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molecule |
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atom |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
cumulus clouds |
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cirrus clouds |
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nimbus clouds |
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stratus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.