| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.18 |
| Score | 0% | 64% |
In cell biology, what part of the cell contains organelles?
nucleus |
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cell wall |
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cell membrane |
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cytoplasm |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
Scalar quantities are fully described by which of the following?
a direction only |
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a magnitude only |
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a magnitude and a polarity |
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a magnitude and a direction |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
potential |
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inherent |
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gravitational |
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kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
The envelope of gases surrounding the planet is called the:
atmosphere |
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geosphere |
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hydrosphere |
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lithosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).
Changes to an object's speed or direction of motion are caused by which of the following?
work |
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a force |
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kinetic energy |
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power |
Force is applied to change an object's speed or direction of motion.