| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
The heat from the Sun traveling to Earth is an example of which of the following?
convection |
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radiation |
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conduction |
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electricity |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
The formula for acceleration is which of the following?
\(\vec{a} = { m \over \vec{F} }\) |
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\(\vec{a} = { m \over F }\) |
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\(\vec{a} = \vec{F} m\) |
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\(\vec{a} = { \vec{F} \over m }\) |
Newton's second law of motion leads to the formula for acceleration which is a measure of the rate of change of velocity per unit time and, if you solve for positive acceleration, reveals how much net force is needed to overcome an object's mass. The formula for acceleration is \(\vec{a} = { \vec{F} \over m }\) or, solving for force, \(\vec{F} = m\vec{a}\).
The four planets closest to the Sun are called terrestrial. What does terrestrial mean?
the planets have moons |
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the planets have magnetic fields |
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the planets have water |
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the planets are Earth-like |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
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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kinetic |
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inherent |
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gravitational |
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.
Which of the following is not part of the carbon cycle?
photosynthesis |
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respiration |
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decomposition |
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precipitation |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.