| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Which of the following states of matter exists at the highest temperature?
gas |
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liquid |
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solid |
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none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of the following describes how a person's genes express themselves in physical characteristics?
chromotype |
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DNA |
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genotype |
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phenotype |
A person's genotype is their genetic makeup and includes both dominant and recessive alleles. Phenotype is how the genes express themselves in physical characteristics.
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = { t \over \vec{d} } \) |
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\(\vec{v} = { \vec{d} \over t } \) |
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\(\vec{v} = \vec{d}t \) |
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none of these |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This describes which of Newton's laws of motion?
third |
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second |
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fourth |
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first |
Also known as the law of inertia, Newton's first law of motion states that An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Which of the following is true about species groups?
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 |
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a community is made up of a group of populations |
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.