| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.18 |
| Score | 0% | 64% |
Which of the following is not true about simple magnets?
all of these are untrue |
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same poles repel each other |
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opposite poles repel each other |
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opposite poles attract each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.
A subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. This desribes which of the following?
proton |
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electron |
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neutron |
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isotope |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
Which of the following is true about species groups?
a biome is a made up of a group of biospheres |
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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 |
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.
Changes to an object's speed or direction of motion are caused by which of the following?
kinetic energy |
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a force |
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power |
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work |
Force is applied to change an object's speed or direction of motion.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
brainstem |
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cerebrum |
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medulla |
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cerebellum |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).