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WorksheetsEnergy for 7th
Total questions: 29
Worksheet time: 16mins
At which point in the rollercoaster ride does the car have the greatest potential energy?
W
X
Y
Z
At which point will the pole have the maximum elastic potential energy?
The pole always has the greatest elastic potential energy.
When the vaulter is running with the pole.
When the pole is straight.
When the pole is bent backwards.
The hand generator works by turning the handle which lights up the bulb. What energy transformation occurs as the handle is turned?
Thermal to electrical
Electrical to mechanical
Mechanical to electrical to light
Light to electrical
A solar calculator has to have light in order to work. What does the radiant light energy transform into?
Radiant
Mechanical
Potential
Chemical because of the battery.
What is the energy transformation that occurs in an electric pencil sharpener?
mechanical energy to electrical energy
electrical energy to mechanical energy
radiant energy to sound energy
chemical energy to mechanical energy
Where is the kinetic energy the greatest?
A
B
C
D
What energy transformation occurs during photosynthesis?
Chemical --> Radiant
Thermal --> Chemical
Radiant --> Chemical
Mechanical --> Thermal
A plumber is going to put two pipes in a wall, one in front and one in back. The pipes will be touching once they are installed. Both pipes are the same size and have the same number of molecules. The diagram above shows the pipes now, before they have touched. Use the information in the diagram to answer the question.
How does the temperature of the front pipe compare with the temperature of the back pipe before the pipes touch? What will happen after the pipes have been touching for a while?
Before the pipes touch, the front pipe is cooler than the back pipe. Once the pipes are touching, the back pipe will transfer kinetic energy to the molecules in the cooler front pipe until both pipes reach the same temperature, which will be in between their starting temperatures.
Before the pipes touch, the two pipes are different temperatures. Once the pipes are touching, the kinetic energy and cold energy will transfer between the molecules in the two pipes until both pipes reach the same temperature, which will be in between their starting temperatures.
Before the pipes touch, the front pipe is hotter than the back pipe. Once the pipes are touching, the cooler back pipe will gain kinetic energy until the molecules in both pipes have an energy of 100, because hotter things increase the temperature of cooler things.
Before the pipes touch, the front pipe is hotter than the back pipe. Once the pipes are touching, the front pipe will transfer kinetic energy to the molecules in the cooler back pipe until both pipes reach the same temperature, which will be in between their starting temperatures.
Rico and Bree are camping and have potatoes wrapped in foil to eat. Bree put her potato in the campfire for a while, but Rico did not. Now Bree’s potato has a high temperature. What is the difference between the molecules of the two potatoes?
There is no difference because both potatoes are made of the same type of molecules.
The molecules of Rico’s potato are smaller than the molecules of Bree’s potato.
The molecules of Bree’s potato are moving and the molecules of Rico’s potato are not moving.
The molecules of Bree’s potato are moving faster than the molecules of Rico’s potato.
Heat always travels from...
Warm to cool
Cool to warm
Warm to warm
Cool to cool
A hot air balloon rising is an example of ...
conduction
convection
radiation
connection
A snowman melting in the sun
convection
conduction
radiation
connection
Eggs cooking in a frying pan
convection
conduction
radiation
connection
Heating a kettle on a hot stove (burner)
convection
conduction
radiation
connection
A stove top will cook your food because of ___________.
convection
conduction
radiation
connection
A blow dryer uses __________ to dry your hair.
convection
conduction
radiation
connection
Thermal energy that is transferred from one substance to another.
heat
temperature
thermal energy
radiation
At what point does the biker have the greatest Potential Energy?
Point A
Point B
Point C
Point D
At what point does Potential Energy transform into Kinetic Energy?
Point A
Point B
Point C
Point D
Which Apple has the greatest Gravitational Potential Energy?
The object with a mass of 3kg because its mass is less.
The object with a mass of 50kg because its mass is greater.
Both objects because they are at the same height.
Neither of the objects because they are at the same height.
What is the Energy Conversion that is shown in the image?
Radiant to Thermal
Thermal to Chemical
Chemical to Radiant
Radiant to Chemical
What is the Energy Conversion that is shown in the image?
Chemical to Mechanical
Thermal to Chemical
Chemical to Thermal
Mechanical to Chemical
Which of the following is an example of a Thermal Conductor?
Plastic
Styrofoam
Wood
Copper
