Worksheet Solutions: Energy-How Things Work | Our Wondrous World Class 5 - New NCERT PDF Download

Q1: Choose the correct option for each question.
(i) What is the primary source of energy for life on Earth?
A) Oil
B) The Sun
C) Coal
D) Natural Gas
Ans: B) The Sun

(ii) Which of the following is a non-renewable energy source?
A) Solar
B) Wind
C) Coal
D) Water
Ans: C) Coal

(iii) What type of energy do solar panels convert?
A) Thermal Energy
B) Mechanical Energy
C) Solar Energy
D) Kinetic Energy
Ans: C) Solar Energy

(iv) Which energy source is used in cooking gas?
A) Electricity
B) Natural Gas
C) Coal
D) Wood
Ans: B) Natural Gas

(v) What do windmills generate?
A) Heat
B) Light
C) Electricity
D) Sound
Ans: C) ElectricityWindmill

Q2: Match the items in Column A with the correct descriptions in Column B.

Ans:

Q3: Fill in the blanks with the correct words from the chapter.
(i) The process of converting sunlight into electricity is called __________.
(ii) __________ is a common fuel used in vehicles.
(iii) The __________ is responsible for warming our homes during winter in cold regions.
(iv) __________ is a renewable source of energy that can be harnessed by using solar panels.
(v) Electricity is used in homes for lighting, heating, and __________.

Ans: 
(i) The process of converting sunlight into electricity is called solar energy conversion.Solar Panels(ii) Petrol is a common fuel used in vehicles.
(iii) The body heat of animals is responsible for warming our homes during winter in cold regions.
(iv) Solar energy is a renewable source of energy that can be harnessed by using solar panels.
(v) Electricity is used in homes for lighting, heating, and powering appliances.

Q4: State whether the following statements are True or False. Correct the false statements.
(i) The Sun provides energy only in the form of light.
Ans: False

(ii) Animals do not require energy to move.
Ans: False

(iii) Burning wood produces less pollution than burning coal.
Ans: True

(iv) Solar power is a clean source of energy.
Ans: TrueSolar energy is a clean energy

(v) All electricity comes from renewable sources.
Ans: False

Q5: Answer the following questions in 2-3 sentences each.
(i) What is energy?
Ans: Energy is the power that makes things happen. It helps us move, play, and do work. We see energy in the sun, food, and even in the wind!

(ii) How do we get energy from food?
Ans: We get energy from food by eating it. Our bodies turn the food into energy, which helps us run, jump, and play. Just like how cars need fuel to move, we need food for energy!Good food gives us energy

(iii) What are some sources of energy?
Ans: Some sources of energy include the sun, wind, and water. The sun gives us light and heat, wind can turn windmills, and water from rivers can help make electricity. These are clean and good for the Earth!

(iv) Why is electricity important?
Ans: Electricity is important because it helps us use lights, fans, and TVs. It makes our lives easier by powering many things we need at home and in schools. But we must use it safely!

(v) What is clean energy?
Ans: Clean energy comes from sources like the sun, wind, and water. It does not produce pollution or smoke. Using clean energy is better for our planet and helps keep the air we breathe fresh!

Q6: Answer the following questions in 4-6 sentences each. Use examples from the chapter to support your answers.
(i) What is energy, and how do we use it in our daily lives? Give examples.
Ans: Energy is what makes things move, light up, make sounds, or change temperature around us. We use energy every day in many ways:

• At home: Food gives us energy to run and play, and electricity powers fans and lights
• For cooking: Gas, wood, or coal help cook our meals
• For transport: Petrol and diesel make cars and scooters run
• From nature: Sunlight dries our clothes and warms water
  Energy is everywhere - even when we think, sleep, or sit quietly, our brain uses energy!

(ii) Why should we use clean energy sources like solar and wind power instead of coal?
Ans: Clean energy sources are better for our planet and health because:

• No pollution: Solar panels and windmills don't create smoke or harmful gases like coal does
• Always available: The Sun and wind are natural sources that never run out
• Healthier air: Clean energy doesn't make the air dirty, so we can breathe better
• Examples in India: Cochin Airport runs completely on solar power, and Rajasthan has huge solar parks
  Coal burning creates smoke that harms our lungs and makes the environment dirty, while clean energy keeps everything fresh and safe.

(iii) How do different sources provide energy to make things work? Explain with examples.
Ans: Different sources give us energy in various ways:

• Food energy: When we eat, our body gets energy to move, think, and play - just like animals need food to run and fly
• Fuel energy: Cars use petrol, cooking gas burns to make heat, and oil in diyas helps them burn longer
• Electrical energy: Fans move, bulbs give light, TVs make sound - all using electricity
• Natural energy: Wind spins pinwheels, flowing water turns water wheels, and sunlight heats and dries things
  Each source has a special job - food for living things, fuel for machines, and nature for clean power.

(iv) What safety rules should we follow while using electricity, and why is energy efficiency important?
Ans: We must be very careful with electricity because it can be dangerous:

• Safety rules: Never touch wires with wet hands, don't put fingers in sockets, stay away from broken wires
• Tell adults: If you see something unsafe, immediately inform grown-ups instead of trying to fix it
• Energy efficiency means: Using less electricity to do the same work, like LED bulbs give the same light but use less power
• Why save energy: It helps protect the environment and saves money for families
• Smart choices: Turn off lights when not needed, use energy-saving devices
  Being safe with electricity and saving energy helps us and our planet stay healthy and happy.