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WorksheetsUnit 2.1 Energy Review
Total questions: 23
Worksheet time: 23mins
Students are investigating energy transfer in the laboratory. The students use rubber bands and rulers for their investigation. They attach a rubber band to each ruler, pull the band back, and allow the band to launch from the ruler. The diagram shows their set up (S8P2. B)
The more potential energy the band has, the more kinetic energy is transferred, and the farther the band travels.
The less potential energy the band has, the more kinetic energy is transferred, and the farther the band travels.
The more kinetic energy the band has, the more potential energy is transferred, and the farther the band travels.
The less kinetic energy the band has, the more potential energy is transferred, and the farther the band travels.
A student is investigating energy transfer from potential to kinetic energy using a toy car on a ramp. The student place the toy car at the top of the ramp, releases it, and records how far the car travels. The student's setup is shown. (S8P2. B)
Which statement best describes what would happen if the student increased the angle of the ramp?
The toy car would travel farther because more kinetic energy would be transferred into potential energy.
The toy car would travel farther because more potential energy would be transferred into kinetic energy.
The toy car would not travel as far because more potential energy would be transferred into kinetic energy.
The toy car would not travel as far because more kinetic energy would be transferred into potential energy.
A student wants to show the transfer of heat energy without matter. Which investigation design would best help the student? (S8P2. D)
an investigation of radiation through a current in a fluid
an investigation of radiation through electromagnetic waves
an investigation of conduction through collisions between particles in space
an investigation of conduction through the movement of particles through a solid
Tyana is using lead balls to perform investigations of kinetic energy. She records her observations in two tables. (SP82. A)
Using the patterns observed in Tyana's data, which two graphs best represent the relationships between velocity, mass, and kinetic energy?
A ball is dropped from rest from point 1, and by the time it reaches point 2, it has gained 2 J of kinetic energy. As it continues its fall from point 2 to point 3, its kinetic energy increases by another 6 J. (S8P2.B) What is the ball's change in gravitational potential energy as it falls from point 1 to point 3?
an increase of about 6 J
an increase of about 8 J
a decrease of about 6 J
a decrease of about 8 J
The model below represents a rocket in flight. (S8P2.B) What would be the best use of this model by a scientist?
to model one-directional forces, as the rocket is affected by only one force
to model the idea of zero gravity, as the rocket is not affected by gravity
to model the transition between the kinetic and potential energy of the rocket
to model the effects of wind resistance on the rockets' descent
to the ground
In the diagram below, a 5 kg object is moving with a speed of 10 m/s, and a 10 kg object is moving with a speed of 5 m/s. (S8P2.A)
Which object in the diagram has more kinetic energy?
Both of the objects have the same amount of kinetic energy.
The 5 kg object has more kinetic energy.
The 10 kg object has more kinetic energy.
Neither object has any kinetic energy.
The image below shows a pool being heated using energy from the Sun. (SP82.C) Which of the following correctly lists the sequence of how energy flows to heat the pool?
Sun → pipes → swimming pool → solar panel
Sun → solar panel → pipes → swimming pool
swimming pool → pipes → solar panel → Sun
pipes → swimming pool → solar panel → Sun
The picture shows a lamp. (SP82.C)
Which three forms of energy is the lamp using?
heat, light, and sound
electrical, light, and heat
mechanical, sound, and light
light, mechanical, and electrical
Jennifer uses many forms of energy to get ready for school in the morning. Which table best matches each form of energy to Jennifer's actions? (SP82.C)
A
B
C
D
A student places a drop of purple food coloring into one beaker of water at 20°C and another drop into another beaker of water at 50°C. The temperature of the food coloring is 19°C. The picture shows what he observes. (S8P2. D)A student places a drop of purple food coloring into one beaker of water at 20°C and another drop into another beaker of water at 50°C. The temperature of the food coloring is 19°C. The picture shows what he observes. (S8P2. D)
The food coloring moves faster in hot water.
The food coloring moves slower in hot water.
The food coloring is denser than the cold water.
The food coloring is less dense than the cold water.
The food coloring separates into two different colors.
Tony built a ramp to determine the average distance his toy car will travel when released down the ramp. (SP82.A) Which experiment will best test how far his toy car will travel when released down the ramp?
an experiment that measures the distances that his toy car travels in many repeated trials
an experiment that measures the distances that different toy cars travel in many repeated trials
an experiment that measures the distances that his toy car travels in two trials
an experiment that measures the distances that different toy cars travel in two trials
Rose touches a hot stove and burns her hand. What type of energy transfer caused the burn? (SP82.D)
radiation
conduction
convection
insulation
The diagram shows a simple pendulum. (SP82.B) Neglecting friction, what happens to the total mechanical energy as the pendulum swings from position A to position B?
It increases.
It decreases.
It remains the same.
It is not conserved.
In the diagram below, two identical objects are released from rest at the starting position. Object 1 was released first and sometime later Object 2 was released. The diagram below shows the positions of Objects 1 and 2 a short time after both were released. (SP82.A)
Which object in the figure has the most kinetic energy?
Object 1
Object 2
Both objects have the same amount of kinetic energy.
Neither object has any kinetic energy.
During a house fire, the air that contains the smoke rises to the ceiling. Why is the air by the floor cooler and less smoky? (SP82.D)
because radiation causes the cooler, more dense air to sink to the floor
because conduction causes the cooler, more dense air to sink to the floor
because subduction causes the cooler, more dense air to sink to the floor
because convection causes the cooler, more dense air to sink to the floor
The picture below shows a model of a water geyser like those in Yellowstone National Park, which erupt with giant plumes of hot water. (SP82.D)
Which process drives geyser eruption?
Which
process drives geyser eruption?
the conduction of thermal energy from the ground
the condensation of water that collects underground
the radiation of the Sun's energy into the ground water
the convection of water above the hot magma in the mantle
A Great Day for a Ball Game
Alisha ran onto the field during her softball game, and the Sun was shining bright. She felt the sweat dripping from her forehead, but she did not care. Today was the championship game! There were two outs in the last inning, and her team was winning 8-7. One more out and her team would win the trophy. The player up to bat was the other team's best hitter. However, Alisha was determined to win. On the first pitch, the batter hit the ball hard and high, making a loud smack. Alisha saw the ball way up high and ran as fast as she could after it. She jumped for the ball and heard the crowd scream. She looked down, and the ball was in her glove. They had won the game!
Which part of the story shows an example of heat energy? (SP82.C)
"Alisha saw the ball way up high and ran as fast as she could after it."
"On the first pitch, the batter hit the ball hard and high, making a loud smack."
"... the Sun was shining bright. She felt the sweat dripping from her forehead ..."
"... her team was winning 8-7. One more out and her team would win the trophy."
A bicyclist traveling at 24 km/h squeezes the brakes and slows down to a stop in 2.5 seconds. Which of the following statements best describes what happened to the energy of the moving bicycle? (SP82.C)
The kinetic energy was converted to thermal energy.
The chemical energy was converted to mechanical energy.
The kinetic energy was converted to chemical energy.
The chemical energy was converted to thermal energy.
A skateboarder is shown below. (SP82.A) At which point is the skateboarder's potential energy the greatest?
W
X
Y
Z
Jalisa is rolling down a steep hill. When is her kinetic energy most likely the highest (SP82.A)
at the very top of the hill before she has started rolling down the hill
at the bottom of the hill just before she stops moving
right after the top of the hill just as she starts rolling down the hill
at the bottom of the hill once she has stopped moving
An electric fan is plugged into an outlet and the circuit completed, making the fan blades spin. Which of the following correctly describes this situation? (S8P2.C)
Mechanical energy is transformed into electrical energy.
Electrical energy is transformed into mechanical energy.
Mechanical energy is destroyed, and electrical energy is created.
Electrical energy is destroyed, and mechanical energy is created.
The picture below shows Alfred testing his strength at an amusement park on a machine that, when hit, moves a small metal ball upward. (S8P2.C) Which of the following moves the metal ball to the top to ring the bell?
mechanical energy produced by Alfred
heat energy produced by the ball
sound energy produced by the bell
light energy produced by electricity
