**What is Energy?** Energy makes things move, light up, produce sound, do work, and change temperature.
**Sources of Energy:**
• Food = energy for humans and animals
• Fuel (petrol, diesel, gas, wood, coal) = energy for vehicles and cooking
• Sun = free heat and light energy
• Moving air = energy to push things forward
• Vibrations = sound energy
**Energy in Our Homes:**
• Kitchen: stove uses gas or fuel to cook
• Sunlight through windows warms rooms for free
• Cattle body heat warms homes in cold regions
• Breakfast food gives us energy to run and study
**Important Activities to Remember:**
1. Balloon activity: air movement = energy
2. Rubber band guitar: vibration = sound energy
3. Water warmer: sun heat = thermal energy
**Diagrams to Remember:** Balloon rocket setup with string and straw; rubber band guitar with cardboard box; sun warming water in cups.
**Don't Confuse:** Energy is NOT just electricity—energy includes food, sun, fuel, air, and heat all around us. Burning coal and wood makes smoke (bad), but sun energy is clean (good).
Q1. What is energy?
Answer: A — Energy is the force that makes things move, produce light, make sounds, and change temperature in many ways.
Q2. In the balloon activity, when you release the balloon, what makes it move?
Answer: B — The moving air pushing out of the balloon is the energy that makes the balloon move forward.
Q3. What is the main source of energy for all living things?
Answer: C — Food provides energy to humans and animals, allowing them to move, grow, and work every day.
Q4. In the rubber band guitar activity, what happens when you pluck the rubber bands?
Answer: B — When rubber bands vibrate by plucking, they make sound energy, which we hear as musical sounds.
Q5. Fill in the blank: Water in sunlight becomes warmer because the Sun gives us _____ energy.
Answer: C — The Sun provides heat energy that warms the water, as shown in the sun-powered water warmer activity.
Q6. What fuels do people use to cook food at home? (Choose the correct one)
Answer: B — Cooking gas, wood, and coal are all fuels that provide heat energy to cook food in different homes across India.
Q7. Why do you feel more active after eating breakfast?
Answer: B — Food is a source of energy, so when we eat breakfast, we get energy to move, run, and do activities.
Q8. In some cold regions like Himachal Pradesh, how do people stay warm without using extra firewood?
Answer: B — The body heat from cattle on the ground floor is a natural energy source that warms the rooms above where the family lives.
Q9. Which of these is NOT a source of energy mentioned in the chapter?
Answer: D — Plastic bags are materials, not sources of energy, while food, sun, and cooking gas all provide energy to make things work.
Q10. What do vehicles like cars and scooters need to keep running on the road?
Answer: C — Petrol and diesel are fuel sources that provide the energy needed to make vehicles move and run on roads.
What is energy?
Energy is what makes things move, light up, produce sound, do work, and change temperature.
Name one source of energy for living things.
Food is a source of energy for all living things like humans and animals.
What happens when you pluck a rubber band?
The rubber band vibrates and produces sound energy.
How does a balloon move after you release it?
The air rushing out of the balloon pushes it forward, showing movement energy from moving air.
What fuel do we use to cook food at home?
Cooking gas, wood, or coal are fuels we use to cook food at home.
What makes water warm in the sun activity?
The Sun's heat energy warms the water when it is kept in sunlight.
Why do we feel tired when we are hungry?
Food gives us energy, so when we do not eat, we lack energy and feel tired.
What do cars and scooters need to keep running?
Petrol and diesel are fuels that provide energy for vehicles to run.
Name one activity in your kitchen that uses energy.
Food is being cooked on the stove using heat energy from gas or fuel.
How do animals get energy to move and find food?
Animals get energy from the food they eat, just like humans do.
What is energy? Give one example from your kitchen. [1 mark]
Energy = what makes things move, light up, or get warm. Example: gas stove cooking food uses heat energy.
Describe the balloon activity and explain what makes the balloon move. What kind of energy is this? [2 marks]
When you blow air into a balloon and release it, moving air pushes it forward. This is movement energy from moving air.
Name three different sources of energy we use every day at home and in our community. Explain how each one helps us. [3 marks]
Sources: food (gives us energy to move), cooking gas (heats food), sun (warms rooms, free energy). Explain what each source helps us do or make.
How does the sun-powered water warmer activity show energy at work? Describe the activity step by step and explain what you observed. Why does the water in sunlight become warmer than the water in shade? [5 marks]
Steps: fill two cups with water, place one in sun and one in shade, wait 15-20 minutes, touch both cups. The sun's heat energy warms the water in sunlight. Heat energy from the sun is transferred to the water, raising its temperature.
True or False: Burning wood and coal to cook food is the same as using sunlight to warm water. Give a reason for your answer. [2 marks]
False. Burning wood/coal makes smoke (bad for air), but sun energy is clean and free. Write why one is better than the other.
Practice with interactive flashcards, mind maps, upload your own chapters and get AI study kits instantly
Try StudyOS Free →