EVS Chapter 24: The Web of Life

Understanding the Web of Life

Imagine you are having your lunch. You might be eating rice and dal. The rice and dal come from plants. So, you are connected to plants! Now, think about a bird. A bird might eat a small worm. The worm might eat tiny bits from the soil. So, the bird, the worm, and the soil are all connected. This connection between all living and non-living things is called the 'Web of Life'.

Everything gets its energy from the Sun. Plants use sunlight, water from the soil, and air to make their own food. That's why they are called producers. Animals cannot make their own food. Some animals, like cows and goats, eat plants. They are called herbivores. Other animals, like lions and eagles, eat other animals. They are called carnivores. This creates a chain: grass is eaten by a deer, and the deer is eaten by a lion. This is a food chain. The web of life is made of many such food chains connected together. Even non-living things like water, air, and rocks are part of this web because all living things need them to survive.

Key Parts of Our World

Living Things

Things that have life. They can breathe, grow, eat, and move. Examples: Plants, animals, humans, insects.

Non-living Things

Things that do not have life. They cannot breathe, grow, or move on their own. Examples: Sun, water, air, soil, rocks, clouds.

Producers

Living things that 'produce' or make their own food. All green plants are producers.

Consumers

Living things that 'consume' or eat other living things for energy. All animals and humans are consumers.

Example: How Things are Connected

1. Step 1: The Sun Gives Energy — The Sun is the main source of energy for our planet. It gives light and warmth.
2. Step 2: Plants Make Food — A plant, like grass, uses the Sun's energy, along with water from the soil and air, to make its food and grow.
3. Step 3: A Small Animal Eats the Plant — A grasshopper comes along and eats the grass. The grass gives the grasshopper energy to hop and live.
4. Step 4: A Bigger Animal Eats the Small Animal — A frog sees the grasshopper and eats it. The frog gets energy from the grasshopper.
5. Step 5: The Chain Continues — A snake might then eat the frog. This shows how energy moves from the sun to the plant, to the grasshopper, to the frog, and then to the snake. They are all linked in the web of life!

Important Things to Remember

• Everything in nature is connected and depends on something else.
• Living things need non-living things like sun, air, and water to live.
• Plants are special because they can make their own food.
• Animals get their energy by eating plants or other animals.
• If we remove even one small part of the web, it can cause problems for many other parts.

Practice Questions with Solutions

• Q: What does a cow need to live? Connect it to other things in the web of life.
  A: Step 1: Think about what a cow eats and drinks. A cow eats grass and drinks water.
  Step 2: Think about where grass and water come from. Grass is a plant that needs sunlight, air, and soil to grow. Water comes from rain and rivers.
  Step 3: Connect everything. The cow depends on grass (living thing) and water (non-living thing). The grass depends on the sun, soil, and air (non-living things).
  Final answer: A cow needs grass, water, and air to live. It is connected to plants, the sun, water, air, and soil in the web of life.

• Q: If all the plants disappeared from a forest, what would happen to the deer?
  A: Step 1: Remember what deer eat. Deer are herbivores, which means they eat plants.
  Step 2: Imagine a forest with no plants, grass, or leaves.
  Step 3: The deer would have no food to eat. They would become very weak and hungry.
  Final answer: If all the plants disappeared, the deer would not be able to find food and would not be able to survive.

• Q: Name two living things and two non-living things you see in a park.
  A: Step 1: Look around a park in your mind. Identify things that are alive (can grow, move, breathe).
  Step 2: Identify things that are not alive (cannot grow, move, breathe on their own).
  Step 3: List two of each.
  Final answer: Two living things in a park are trees and squirrels. Two non-living things are the bench and the water in the fountain.

• Q: Connect the things that depend on each other: Rabbit, Sun, Carrot.
  A: Step 1: Think about what each thing does or needs. The Sun gives energy. A carrot is a plant. A rabbit is an animal.
  Step 2: A carrot is a plant, so it needs the Sun's energy to grow.
  Step 3: A rabbit eats carrots to get energy.
  Final answer: The carrot depends on the Sun to grow. The rabbit depends on the carrot for food. So, the connection is: Sun -> Carrot -> Rabbit.

Frequently Asked Questions