FREE PHYSICAL SCIENCE AND STUDY GAMES ABOUT

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FREE PHYSICAL SCIENCE AND STUDY GAMES ABOUT

ENERGY UNIT 5 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -25 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A motor causes a copper coil to spin because it sends a current through paperclips to the coil. This demonstrates

Answer:

Electrical energy that transforms to Mechanical energy in the spinning coil.

Question 2: Can energy be created by power juice?

Answer:

(energy cannot be created) Question 3: When the roller coaster car goes downhill, what happens to the amount of kinetic energy?

Answer:

# (it increases)

Question 4: Kinetic energy is determined by an object's mass and its...

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#(speed)

Question 5: The roller coaster car with the MOST potential energy would be the one that is on the

Answer:

(highest part of the track)

Question 6: A beaker of water on a hotplate increases in temperature because...

Answer:

# (electrical energy changes to thermal energy)

Question 7: When a TV is turned on...

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#Electrical energy is changed to sound and light energy.Question 8: Choose a scenario for this energy transformation: chemical energy to heat energy to mechanical energy

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(gasoline is burned to move a car) Question 9: How do the potential energy and the kinetic energy of roller coaster cars relate? At the highest point the car has

Answer:

# (the greatest potential energy and the least kinetic energy)

Question 10: Cat sitting on top of a refrigerator has...

Answer:

(potential) energy Question 11: When spinning blades turn generators and the generators produce electricity, the energy conversion is...

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# (kinetic energy to electrical energy)

Question 12: A marble was dropped into flour from different heights. The higher the marble's position, the deeper the hole it made in the flour. What were the students investigating?

Answer:

(Does more potential energy transform into more kinetic energy when an object falls?) Question 13: Steam rotates fan-like blades of a turbine that then spins an electric generator showing that...

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# (mechanical energy from the turbine converts to electrical energy in the generator) Question 14: Energy transfers that take place in an car engine: the battery's

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Chemical energy changes to the starter's electromagnetic energy, then to mechanical energy that turns the fan belt.Question 15: The form of energy that increases as an acorn falls from a tree branch is

Answer:

Kinetic energy Question 16: Along any roller coaster ride, the cars have the greatest potential energy when

they are:

Answer:

# (at the top of the hills) Question 17: Roller coaster cars will experience the greatest gravitational potential energy...

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#At the top of the (higher) hill.Question 18: Can a battery in a flashlight create the energy to make the light shine?

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# (batteries store energy; they do not create it) Question 19: When you rub your hands on your arms to warm up, what is the energy transformation?

Answer:

# (mechanical to thermal)

Question 20: A transfer of energy is NOT involved in which situation?

Answer:

(helium balloon floats in place)

Question 21: The conclusion of the marble experiment was that

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falling objects with more potential energy (do) have more kinetic energy.Question 22: Energy transformation that occurs when a switch is turned on a lamp...

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#(electrical to light) Question 23: If a pump pushes water up by turning a propeller that spins and forces the water up the pipe, what energy transformation is happening?

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#Electrical energy (in the pump) to Mechanical energy Question 24: A battery is used to light a flashlight: the energy transformations are: Chemical energy to electrical energy to...

Answer:

(thermal energy to light energy) Question 25: What types of energy transformations occur when a gear-driven flashlight shines?(the handle turns the gears, the gears turn a switch, then the light shines)

Answer:

#Mechanical energy to, Electrical energy to, Light energy