Energy and change (T1 W5)
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Energy is the ability to do work or cause change. It exists in various forms, such as kinetic energy (energy of motion), potential energy (stored energy), thermal energy (heat), and more. Understanding energy helps us see how it affects our daily lives, from powering our homes to moving our bodies.
Energy causes change in many ways. For example, when you push a toy car, your muscles provide kinetic energy, making the car move. Similarly, when you heat water on a stove, thermal energy changes the water from liquid to steam. These examples show how energy is essential for change in our environment.
Consider a light bulb. When electricity (a form of energy) flows through it, the light bulb produces light and heat. Another example is a rubber band. When you stretch it, you store potential energy, which transforms into kinetic energy when you release it, causing the band to snap back.
Let's brainstorm different forms of energy we encounter daily. Students will share examples such as solar energy from the sun, wind energy from breezes, and chemical energy from food. As we discuss, we will write down key vocabulary words on the board, such as 'kinetic,' 'potential,' 'thermal,' and 'electrical.'
Students will create a poster illustrating an example of energy transformation. They can choose a topic such as a light bulb, a roller coaster, or a plant growing. The poster should include drawings, labels, and a short explanation of how energy changes form in their chosen example. Students will present their posters to the class.
Answer: The ability to do work
Energy is defined as the ability to do work or cause change.
Answer: A moving car
Kinetic energy is the energy of motion, as seen in a moving car.
Answer: A stretched rubber band.
A stretched rubber band stores potential energy that can be released.
Answer: It evaporates
Heating water causes it to change from liquid to gas, a process called evaporation.
Answer: Thermal energy is heat energy.
Thermal energy refers to the energy that comes from heat.
Answer: Solar energy
Plants use solar energy during photosynthesis to create food.
Answer: A battery powering a toy
This is an example of chemical energy in the battery transforming into kinetic energy in the toy.
Answer: Pedaling provides kinetic energy that moves the bicycle.
When you pedal, you convert your muscle energy into kinetic energy, propelling the bike forward.