Chapter: 16. The Earth
Workout
A. Fill in the blanks.
Ferdinand Magellan was the first person to prove that the Earth is $\qquad$ All living things need air to $\qquad$ A gas called $\qquad$ is needed by animals and plants to survive. The shape of the Earth is $\qquad$ The surface of the Earth is made of $\qquad$ and $\qquad$ B. Write T for true and F for false.
One-third of the Earth is made of water. Oxygen is needed by animals only. F (Plants also need it for survival, though they produce it for photosynthesis) The Earth is slightly flattened on the top and the bottom. To save the Earth, we must plant trees. C. Answer the following questions orally.
The atmosphere is the layer of air that is present around the Earth, surrounding it like a thick blanket and made up of gases necessary for life. Why is it neither too hot nor too cold on Earth? It is neither too hot nor too cold on Earth because its distance from the Sun is just right to receive the correct amount of heat, and clouds help regulate temperature by blocking sun rays during the day and trapping heat at night. How do we know that the Earth is round? We know that the Earth is round because Ferdinand Magellan and his crew sailed around the world, starting and ending at the same place, proving its spherical shape. When do we celebrate Earth Day? Earth Day is celebrated on 22 April every year. D. Answer the following questions.
How does the distance from the Sun to the Earth help support life on Earth? The Earth’s distance from the Sun is just right, allowing it to receive the correct amount of heat, which makes it neither too hot nor too cold for life to exist. Write four ways in which you can look after the Earth. Four ways to look after the Earth are: not littering, not wasting water, food, and electricity, not polluting the land, air, or water, and planting trees. How can students help to spread awareness about the importance of planting more trees?
Students can spread awareness about planting more trees by: Organizing school campaigns or presentations. Creating posters, drawings, or short skits to share information. Participating in community tree-planting drives. Sharing facts and benefits of trees with family and friends. Using social media or school newsletters to spread the message. Picture Study
Look at the picture and answer the questions
What message does this picture give you? The picture gives the message that children (and everyone) should love, care for, and protect the Earth, as it is our home. What are the steps you can take to care for the Earth? Steps to care for the Earth include: not littering, not wasting water, food, and electricity, not polluting the land, air, or water, and planting trees. Life Skills and Values
At a birthday party, you are given cake and ice cream on little paper plates, along with a paper napkin and a plastic spoon. When you have finished eating, what do you do with the plate, napkin and spoon? Tick the correct option.
Push them under the sofa and forget about them. Open the window and throw them in the backyard. Put the napkin, plate and spoon in the trash can. Put the napkin, plate and spoon in the trash can. 
Answers to textbook exercises
.