| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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secondary or tertiary consumers |
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primary or tertiary consumers |
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secondary consumers or scavengers |
Secondary or tertiary consumers may be omnivores.
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = m\vec{v}\) |
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\(\vec{p} = {m \over \vec{v}}\) |
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\(\vec{p} = { \vec{v} \over m}\) |
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none of these |
Momentum is a measure of how difficult it is for a moving object to stop and is calculated by multiplying the object's mass by its velocity: \(\vec{p} = m\vec{v}\). Like velocity, momentum is a vector quantity as it expresses force applied in a specific direction.
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
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element |
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atom |
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neutron |
An atom is the smallest component of an element that still retains the properties of the element.
Earth's history is divided into time periods, which of these is the shortest time period?
epoch |
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age |
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eon |
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period |
The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.
In the food chain, consumers are classified as which of the following?
primary |
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tertiary |
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secondary |
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all of these |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.