WorksheetsEnergy (Sem 1)
Total questions: 11
Worksheet time: 8mins
What is the thermal energy of an object?
the total potential energy of its particles
the total kinetic energy of its particles
the total kinetic and potential energies of its particles
its total temperature
When a driver touches a car's steering wheel on a hot day, heat is transferred to the driver's hands by __________.
convection
electromagnetism
conduction
radiation
Sun warms the earth by __________.
radiation
conduction
convection
electromagnetism
How can you tell if two objects are in thermal equilibrium?
The objects are touching each other.
The objects are the same size.
The objects' temperatures are changing.
The objects have the same temperature.
What is the relationship between the kinetic energy of molecules in an object and the object's temperature?
As the kinetic energy of the molecules decreases, the temperature increases.
The kinetic energy always increases whether the temperature increases or decreases.
As the temperature increases, the kinetic energy of the molecules increases.
The total kinetic energy of the molecules is not affected by a change in temperature.
What happens when the temperature of an object increases?
The object's particles move faster.
The object's particles stop moving.
The number of the object's particles increases.
The object's particles move closer together.
What happens when the temperature of an object decreases?
The object's particles move farther apart.
The number of the object's particles decreases.
The object's particles move slower.
The object's particles stop moving.
Which statement accurately describes what happens when ice melts in terms of energy?
The ice releases energy which causes chemical bonds to break, changing the ice to water.
The ice absorbs energy which causes chemical bonds to break, changing ice to water.
The ice absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a solid to a liquid.
The ice releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from solid to liquid.
How are fossil fuels used in the harvesting of fresh apples from an apple tree?
Fossil fuels power the machine that shakes the tree so that the apples fall to the ground.
Fossil fuels power the person picking up the apples from the ground.
Fossil fuels power the ripening of the apples.
Fossil fuels power the rainwater used by the tree.
What makes plants the beginning of the food chain?
All organisms eat plants.
Plants are the only thing that animals can eat to survive.
Only plants use solar energy in a chemical process to produce food.
Plants are green because of cholorphyll
What kind of energy is required for photosynthesis to occur?
energy stored in chemical bonds
energy from nutrients in the ground
thermal energy
solar energy
