Natural Sciences - Term 3 - Week 1

Energy is the ability to do work or cause change. It exists in various forms, such as kinetic energy (the energy of movement) and potential energy (stored energy). For example, when you lift a book, it has potential energy, and when you drop it, that energy transforms into kinetic energy as it falls. Understanding energy helps us see how it affects our daily lives.

Let's look at some examples of energy types. 1. Solar energy comes from the sun and can be used to power homes. 2. Electrical energy powers our devices like lights and computers. 3. Mechanical energy is found in moving objects, like a bicycle in motion. Discuss how each type of energy can cause change in our environment.

In groups, discuss different sources of energy you encounter daily. Each group will list at least three sources and describe how they are used. For example, how does the sun provide energy for plants? After discussing, each group will share their findings with the class, using the vocabulary words we have learned.

Choose an everyday object that uses energy (like a toy car, a light bulb, or a solar panel). Create a poster that explains how energy is transformed in your chosen object. Include drawings, labels, and a short description of the energy types involved. Be prepared to present your poster to the class.

• Energy stored in an object
• Energy of movement
• Energy from the sun
• Energy in food

Answer: Energy of movement

Kinetic energy is the energy that an object possesses due to its motion.

• Wind
• Sun
• Water
• Coal

Answer: Sun

Solar energy comes directly from the sun, which is a primary source of energy for many processes on Earth.

Answer: Gravitational energy

Gravitational energy is a type of potential energy that depends on an object's height above the ground.

• It disappears
• It transforms from electrical to light energy
• It becomes heat only
• It increases in amount

Answer: It transforms from electrical to light energy

When a light bulb is turned on, electrical energy is converted into light energy and some heat.

Answer: Energy transformation is the process of changing energy from one form to another.

For example, when you eat food, chemical energy is transformed into kinetic energy when you move.

• Thermal energy
• Nuclear energy
• Magnetic energy
• Emotional energy

Answer: Emotional energy

Emotional energy is not a scientifically recognized form of energy like thermal, nuclear, or magnetic energy.

• A moving car
• A battery
• A hot cup of coffee
• A stretched rubber band

Answer: A moving car

A moving car has mechanical energy because it is in motion.