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15
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What is one way the respiratory system and the circulatory system work together in the human body?
The respiratory system takes in oxygen, and the circulatory system delivers the oxygen to the cells of the body.
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15
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Which function does the nucleus of a cell perform?
It controls the activity of the cell.
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15
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Why do thunderstorms most often occur in the summer months?
Higher temperatures increase the rate of evaporation and convection.
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eraser
Reset score!
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shark
Other team loses 20 points!
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gift
Win 20 points!
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banana
Go to last place!
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15
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A person enters a room, flips the light switch, and a lamp turns on. What causes the lamp to turn on?
The circuit is open, and flipping the switch closes the circuit.
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15
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How do a volvox and an amoeba get their food?
A volvox uses photosynthesis, and an amoeba surrounds its food.
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15
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Earth's atmosphere is mainly composed of which gases?
nitrogen, oxygen, argon, and carbon dioxide
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15
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Which will cause an increase in the mechanical energy of an object?
increasing its potential energy
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thief
Give points!
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fairy
Take points!
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rocket
Go to first place!
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lifesaver
Give 10 points!
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15
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Which applied force will cause a glass of water sitting on a countertop to move?
an unbalanced force
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15
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Which best explains why muscle is considered a tissue?
It is a group of cells working together.
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boom
Lose 50 points!
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fairy
Take points!
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fairy
Take points!
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thief
Give points!
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15
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In which way are a euglena and a volvox different?
A euglena is an individual cell, while a volvox is a colony of cells.
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15
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What type of weather is most likely observed in an area when cirrus clouds are present?
calm weather
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15
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Why are scientists concerned with ozone depletion in the upper atmosphere?
because it allows ultraviolet radiation to reach Earth's surface
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15
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How do people determine if a vehicle in which they are sitting is moving?
by comparing their position to a fixed object outside the vehicle.
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