Work and Machines
What is the formula for calculating work?
What is W=F*D (where W is work, F is force, and d is distance)
What does the Law of Conservation of Energy state?
What is energy cannot be created or destroyed, only transformed?
What does the Law of Conservation of Energy State?
What is energy cannot be created or destroyed, only transformed?
What does temperature measure?
What is the average kinetic energy of particles in a substance?
What is thermal energy?
What is the total kinetic energy of all particles in a substance?
What is conduction?
What is the transfer of heat through direct contact?
Name a renewable source of energy.
What is solar energy?
What is wind energy?
What is hydroelectric energy?
Name a simple machine that can change the direction of a force.
What is a pulley?
Who is known for defining potential and kinetic energy?
Who is Sir Isaac Newton?
Give an example of energy conservation in a roller coaster.
What is potential energy converting to kinetic energy as the coaster descends?
What is the freezing point of water in Celsius?
What is 0 degrees Celsius?
What is heat?
What is the transfer of thermal energy from one object to another?
What is convection?
What is the transfer of heat through the movement of fluids?
How can we reduce energy consumption at home?
What is using energy-efficient appliances?
What is turning off lights?
What is turning off water?
How do machines help us do work more efficiently?
Machines reduce the amount of force needed or change the direction of the force.
What type of energy is stored in an object due to its position?
: What is potential energy?
How does energy conservation apply to a closed system?
What is in a closed system, the total energy remains constant.
What tool do we use to measure temperture?
What is a thermometer?
What is the difference between thermal energy and temperature?
Thermal energy is the total amount of energy, while temperature measures the average energy of particles
Give an example of conduction in everyday life.
What is touching a hot stove?
Why is it important to use energy wisely?
What is to conserve resources and protect the environment?
What is mechanical advantage??
Answer: What is the ratio of output force to input force in a machine
What is the energy of an object due to its motion called?
What is kinetic energy?
Why is energy conservation important for the environment?
What is conserving energy helps reduce waste and pollution?
How does temperature relate to thermal energy?
Higher temperature means higher average kinetic energy and more thermal energy.
How does heat transfer?
What are conduction, convection and radiation?
What is radiation?
What is the transfer of energy through electromagnetic waves?
What is an example of energy transformation in a light bulb?
What is electrical energy converting to light and thermal energy?
Describe the difference between input work and output work. Define efficiency?
Input work is the work done on a machine, while output work is the work done by the machine.
What are the three types of potential energy?
What is elastic potential energy, chemical potential energy, and gravitational potential energy
Describe how energy is conserved in a pendulum.
The pendulum converts potential energy to kinetic energy and back as it swings.
Explain how thermal expansion works.
What is when materials expand as they heat up due to increased particle movement?
Describe how thermal energy affects states of matter.
Increased thermal energy can change a substance from solid to liquid to gas.
How do convection currents work in the atmosphere?
Warm air rises, cool air sinks, creating a cycle that distributes heat.
Describe the concept of energy efficiency.
What is using less energy to provide the same service or output?