MPL_G5_EVS-I_TB AK_All Terms

Teacher Reference: Textbook Lesson 1: Muscular System 1) While playing kabaddi with friends, Raghav injured his hand. His mother took him to a Ans. doctor. After checking his hand, the doctor said that it was a muscle injury and not a fracture. Raghav wondered what a muscle is and how it looked. Do you know about muscles? Muscles are the soft material under the skin. They help in movement by becoming tight and loose. They also help maintain body posture and help in the digestion of food. 1) Do you know what a hamstring injury is? Find out. Ans. A hamstring is a group of muscles in the back of our thigh. It allows us to bend our leg at the knee. A hamstring injury is a strain or tear to these large muscles. It happens during activities that involve a lot of running and jumping or sudden jerking movements. TB: Muscular System

Teacher Reference: Textbook Lesson 2: Respiratory System 1) Hold your finger under your nose. What do you feel on your finger? Ans. We feel the movement of warm air. 1) Place your hands on your chest as you breathe. What is the pace of your breathing? Ans. Learner’s response (Hint: It is 17–23 breaths per minute.) 2) Does blowing always make things cold? Think, what will happen if you blow on an ice Ans. cream? Will it become colder? Blowing will not always make things cold. Our breath is warmer than the ice cream. So, when we blow on it, the layer of chilled air around the ice cream gets replaced with the air from our mouth. Thus, the ice cream will melt when we blow on it. TB: Respiratory System

Teacher Reference: Textbook Lesson 3: Nervous System 1) If we happen to touch or hold a hot vessel in our hand, what do we do? We let go of it Ans. immediately. How do we come to know that the vessel is hot and we should drop it? Our sense of touch tells us if something is hot or cold. So, when our skin touches the hot vessel, our senses tell us that it is hot and our brain tells us to let go of it quickly. 1) Our body is made up of organs which help us perform various functions. Do you think Ans. they perform these functions on their own? How do we walk? How do our legs move to walk? The organs do not perform functions on their own. The brain controls the whole body and instructs the organs what to do. We walk with the help of our legs. Before we begin to move, the brain sends a signal to the nerves which control the coordination of the leg muscles. TB: Nervous System

Teacher Reference: Textbook Lesson 4: Floats, Sinks and Mixes 1) If we add some sugar to water and stir it for some time, the sugar disappears. What Ans. happens to the sugar? Where does it go? Sugar dissolves in water. Sugar crystals become smaller in size and eventually disappear. 1) Do all the things we add to water get dissolved in it? Ans. No, things such as sand and stones do not dissolve in water. TB: Floats, Sinks and Mixes

Teacher Reference: Textbook Lesson 5: Fruits and Seeds 1) Shahid saw a baby mango plant in his backyard. It was not there a few days back. He Ans. wondered how the new baby plant came out of the soil. Can you guess? The baby plant grew from the seed that may have come accidentally in the soil from somewhere and got all the conditions to grow. TB: Fruits and Seeds

Teacher Reference: Textbook Lesson 6: Plants and Environment 1) Seema planted a lotus plant in her garden and watered it. But it drooped down and Ans. dried up within a few days. What can be the reason for this? Different plants grow in different places. The lotus plant grows in water. Hence, when it was planted in the garden soil it drooped down and died within a few days. 1) Find out more about sacred groves. Ans. Sacred groves are patches of forests dedicated to a local God. People are not allowed to cut trees, plants or kill animals and birds belonging to this area. A sacred grove was a method of saving the forest in olden times when laws were not present. Hariyali, in Uttarakhand, is one of the largest sacred groves in India. TB: Plants and Environment

Teacher Reference: Textbook Lesson 7: Food for Animals 1) Saleena was eating lunch. She found a squirrel on a tree near the window. She Ans. wondered where it got its food from. Do you know how animals find food? Animals eat plant parts or other animals. They find their food from the surroundings by searching for it. TB: Food for Animals

Teacher Reference: Textbook Lesson 8: Food Production 1) Arvind enjoys eating mangoes, and his favourite vegetable is spinach. What are your favourite fruits and vegetables? Ans. 2) Learner’s response Ans. Have you ever thought about where these food items come from and how they reach your house? Most of the food we buy comes from farms. Farmers grow crops in fields. Once the crops are ready, farmers store them in the warehouses or godowns. From these godowns, food is transported to the main markets. From the main markets, it reaches the local markets. Our parents buy the food items from the local markets and bring them home for cooking. TB: Food Production

Teacher Reference: Textbook Lesson 9: Forests as Shelter 1) One day Samarth found a beautiful bird’s picture in one of the magazines his father Ans. bought for him. His dad told him that the bird could not be found in cities. It lived only in forests. Also, he promised to take him to a forest someday. Do you know what a forest is? Learner’s response (Hint: A forest is a large area having many trees. It is also home to different kinds of plants and animals.) TB: Forests as Shelter

Teacher Reference: Textbook Lesson 10: Space Travel 1) On TV, Samarth saw a rocket being fired up in the sky. His father told him that it is a space Ans. mission. He wondered what a space mission is. Do you know? A space mission is a journey of a vehicle into space to gather information or specific scientific data. The vehicle may or may not have humans in it. TB: Space Travel

Teacher Reference: Textbook Lesson 11: Wildfire 1) Samarth wondered how forests caught fire or land got covered with water. Do you know Ans. how these disasters happen? Learner’s response (Hint: Forests catch fire due to heat or lightning, throwing burning things or not putting out campfires and so on. A land gets covered with water due to overflowing rivers and streams because of excessive rain.) TB: Wildfire

Teacher Reference: Textbook Lesson 12: Cyclones and Floods 1) Saif wondered what a cyclone was. Why did the government give cyclone alerts? Ans. A cyclone is a powerful spinning storm that has strong winds and rain. Cyclones are formed over the ocean. The government gives cyclone alerts so that people can prepare in advance to escape the danger and reduce the damage to life and property. TB: Cyclones and Floods

Teacher Reference: Textbook Lesson 13: Earthquakes and Tsunami 1) Pavan was holidaying with his family at a seaside resort. One day, early morning, Ans. suddenly the ground started to shake. His father asked them to get out of the room and rush towards the lawn. Pavan could not understand what was happening. Do you know what happened? It was an earthquake. During earthquakes, the ground shakes, and buildings may tumble. That is why Pavan’s father asked them to rush towards the lawn. TB: Earthquakes and Tsunami

Teacher Reference: Textbook Lesson 14: Simple Machines 1) Have you ever played on a see-saw with your friend? How can it lift you up and bring Ans. you down? A see-saw is a type of a simple machine. It has a long, narrow board, which acts as a lever and is supported by a balance at the centre. The lever exerts a force and lifts the person. A person sits at each end of the board on a see-saw. They take turns pushing their feet against the ground to lift their side into the air. 1) What do the carpenters use to put the wooden planks together while making furniture? Ans. Carpenters use fasteners, bindings or adhesives and screws and nails to put the wooden planks together while making furniture. 1) Mark the effort, fulcrum and load in the given picture. load effort fulcrum TB: Simple Machines