EVS-ENERGY NOTES

                Energy

New Words

1.  energy

2.  healthy

3.  unique

4.  scamper

5.  blowing

6.  Energeia

7.  excitement

8.  petrol

9.  wind

10.produce

True or False:

1.  Birds get energy to fly from the air.- False

2.  Animals, birds and humans get energy from the food they eat.- True

3.  Animals and birds use the energy to move from one place to another. True

4.  All food gives  the same amount of energy. False

Fill in the blanks:

1.  We get energy from the food we eat.

2.  The process of making food by the plants using sunlight is called photosynthesis.

3.  Wind energy is used by windmills to produce electrical energy.

4.  Bees buzz and butterflies flutter because of energy.

5.  The word energy comes from the Greek word Energeia.

6.  The energy of moving water is used to produce hydro electricity.

Answer the questions:

1.  Define:

a. Energy : The ability to do work.

b. Solar energy : The energy that we get from the sun in the form of sunlight(light and heat).

2.  Why do we need energy?

Ans. We need energy to perform day to day activities.

3.  List any 3 examples that uses energy.

Ans. Energy is required for playing, swimming, dancing etc.

4.  How do the plants make their food?

Ans. Plants make their own food with the help of chlorophyll in leaves, air , water and in the presence of sunlight.

5.  What happens when the wind blows?

Ans. When the wind blows it causes energy to move around and make objects move. e.g.: Trees swaying

6.  Where do the vehicles get their energy from?

Ans. The vehicles get their energy from the fuels such as petrol, diesel, gas etc.

7.  Name the main sources of energy.

Ans. The sun, water, wind, food and fuels such as petrol, diesel, gas  are the main sources of energy.

8.  How do we get energy?

Ans. We get energy from healthy and nutritious food.

9.  Name the source of energy used in factories to produce goods.

Ans. Electricity is the source of energy used in factories to produce goods.

Give reasons:

a. Energy is very special.

Ans – Energy is special as it makes our lives easy and our world lively and unique. It helps us to do all our work. So we should use it effectively and conserve it. Energy should never be wasted.

 b. The sun is an important source of energy.

Ans. Life will not exist on the earth without the sun. We will not be able to see things around us, we will not feel warmth/heat . The sun is the important source of energy as it provides us energy in the form of light and heat.