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7 th Grade Science Force, Motion, and Energy

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A:B: Pressure exerted on a plant cell wall by water passing into the cell An outgrowth on the surface of a plant C:D: Downward growth of plants due to the force of gravity None of these #1 What is Geotropism

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C. Downward growth of plants due to the force of gravity

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A:B: Through the use of force to provide energy Through the use of energy to apply force C:D: Through the use of soil to create force None of these #2 How do seedlings break through the soil to come up?

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B. Through the use of energy to apply force

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A:B: Turgor Pressure Geotropism C:D: Emergence None of these #3 The pressure exerted on a plant cell wall by water passing into the cell

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A. Turgor Pressure

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A:B: Living things do not always need light to live. The sun provides the radiant energy needed by all living organisms to thrive C:D: Light is needed for respiration None of these #4 Why is the sun important to all living organisms on Earth?

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B. The sun provides the radiant energy needed by all living things to survive and thrive

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A:B: Plants need light to produce their own food through photosynthesis Plants need light to produce carbon dioxide C:D: Plants don’t always need to light to survive None of these #5 Why do plants need light?

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A. Plants need light to produce their own food through photosynthesis

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A:B: they store light in the plants vacuoles, but it is not used They use light to create carbon dioxide C:D: They use light for photosynthesis to produce their own food None of these #6 What do plants do with the light They get from the sun?

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C. They use light for photosynthesis to produce their own food

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A:B: Sun – grass - deer Grass – sun - deer C:D: Deer – grass - sun None of these #7 Trace the path of sunlight from Sun to deer.

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A.Sun – deer – grass (Sun provides energy for grass to grow. Deer gets energy from sun by eating the grass)

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A:B: The turgor pressure became weaker due to the lack of water The sun’s energy decreased the turgor pressure in the plant #8 What has happened when plants go limp after standing upright for a long time? C:D: Both None of these

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A. The turgor pressure became weaker due to lack of water

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A:B: The ramp The box C:D: Both None of these #9 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is the independent variable? (Different in the two)

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A. The ramp

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A:B: The ramp Amount of force needed C:D: Both None of these #10 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is the dependent variable? (What is measured)

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B. Amount of force needed

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A:B: The ramp The box C:D: Both None of these #11 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is one constant factor? (The same in the two)

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B. The box

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A:B: A box is being lifted The ramp is 3 meters long C:D: Both None of these #12 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is a qualitative observation in this situation?

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A. A box is being lifted

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A:B: A ramp is being used The ramp is 3 meters long C:D: Both None of these #13 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is a quantitative observation in this situation?

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B. The ramp is 3 meters long

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A:B: 150j 50j C:D: 300j None of these #14 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. What is the amount of work required to move the box in both situations? (Work = Force x Distance)

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A. 150j

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A:B: No W = 150 x 1 W= 50 x 3 Both used 150j of work C:D: Both None of these #15 Students wanted to see if using a ramp would lessen the amount of work needed to load a box into a truck that is 1 meter off the ground. It takes 150 N of force to lift the box without a ramp. It takes 50 N of force to lift the box with a 3 meter ramp. Did the ramp cause the student to use less work? (Work = Force x Distance) Yes W = 150 x 1 W= 50 x 3 Both used 150j of work

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B. No W = 150 x 1 W= 50 x 3 Both used 150j of work

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A:B: S = 38 km/hrS = 38 hrs #16 Measure Speed What is your speed if you travel 114 km in 3 hours? Speed = Distance Time C:D: S = 38 kmS = 3 km/hr

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A. S = 38 km/hr

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A:B: Graph A Graph B C:D: Graph CNone of these #17 Which of these graphs shows a speed that is not changing (constant speed)

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C. Graph C

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