| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
cirrus clouds |
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stratus clouds |
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cumulus clouds |
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nimbus 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.
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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radiation |
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reflection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Which of blood component fights infection?
platelets |
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red blood cells |
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plasma |
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white 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.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
products |
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isotopes |
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reactants |
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ions |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
Which of the following is true about species groups?
a community is made up of a group of populations |
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an ecosystem is a biological population |
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a population is made up of a group of communities |
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a biome is a made up of a group of biospheres |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.