| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
electron |
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neutron |
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atom |
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proton |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
reactants |
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products |
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ions |
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isotopes |
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.
What kind of weather front is likely to create clouds and storms?
cold front |
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warm front |
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temperate front |
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stationary front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Which of the following is true about species groups?
a population is made up of a group of communities |
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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 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.
Which of the following is sedimentary rock?
obsidian |
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sandstone |
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slate |
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basalt |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.