7.7A (Speed), 7.7C (Graphs), 6.8A (Types of PE), 6.8B

Compare and contrast gravitational potential energy and kinetic energy. Which of the following statements is true?

• Gravitational potential energy is stored energy due to an object's position, while kinetic energy is the energy of motion.

• Both gravitational potential energy and kinetic energy depend on the speed of an object.

• Kinetic energy is stored energy, while gravitational potential energy is the energy of motion.

• Gravitational potential energy and kinetic energy are the same and can be used interchangeably.

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TEKS.SCI.6.8A

Which of the following scenarios best illustrates the conservation of energy in an amusement park ride?

• A roller coaster at the top of a hill has maximum kinetic energy.

• A roller coaster descending a hill converts potential energy into kinetic energy.

• A roller coaster at the bottom of a hill has maximum potential energy.

• A roller coaster moving on a flat track has no energy transformation.

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TEKS.SCI.6.8B

Calculate the average speed of a car that travels 150 kilometers in 3 hours.

• 45 km/h

• 50 km/h

• 55 km/h

• 60 km/h

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TEKS.SCI.7.7A

Which of the following best distinguishes between speed and velocity?

• Speed includes direction, while velocity does not.

• Velocity includes direction, while speed does not.

• Speed and velocity are the same and can be used interchangeably.

• Speed is a vector quantity, while velocity is a scalar quantity.

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TEKS.SCI.7.7B

A spring is compressed and then released. Which type of energy transformation occurs?

• Chemical potential energy to kinetic energy

• Elastic potential energy to kinetic energy

• Gravitational potential energy to kinetic energy

• Kinetic energy to chemical potential energy

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TEKS.SCI.6.8A

Describe how energy is conserved in a food web.

• Energy is created at each trophic level.

• Energy is destroyed as it moves through the food web.

• Energy is transferred and transformed from one organism to another.

• Energy remains constant and does not change form.

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TEKS.SCI.6.8B

A cyclist travels 30 kilometers in 2 hours. What is the cyclist's average speed?

• 10 km/h

• 15 km/h

• 20 km/h

• 25 km/h

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TEKS.SCI.7.7A

A car travels 100 meters north in 10 seconds. What is the car's velocity?

• 10 m/s

• 10 m/s north

• 10 m/s south

• 100 m/s north

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TEKS.SCI.7.7B

Plan an investigation to compare the kinetic energy of two objects with different masses but the same speed. What factors should be considered?

• Only the speed of the objects

• Only the mass of the objects

• Both the mass and speed of the objects

• Neither mass nor speed, only the type of objects

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TEKS.SCI.6.8A

Design an experiment to demonstrate energy conservation in an electrical circuit. What is a key component to include?

• A single light bulb with no power source

• A power source, such as a battery, and a resistor

• Only wires with no connections

• A switch that is always off

Tags

TEKS.SCI.6.8B