Elementary Science Class Five Chapter One Our Environment
- Slides: 23
Elementary Science Class: Five Chapter One Our Environment
Topics to Discuss �Environment �Elements of environment �Relationship between Living and Non-living Things �Ecosystem �Mutual Dependence between Plants and Animals �Energy Flow �Food Chain �Food Web
Environment: �Things and events around us that we observe make our environment. �Types: �Natural: Plants, animals, hills, mountains, water bodies etc. �Man-made: Houses, roads, buildings, market etc.
Elements of Environment Living things: Plants and animals. Non-living things: Soil, air, water, chair, table etc.
1. Relationship between Living and Non-living Things: Needs of living things for survival Living things depends on non-living things for survival in the environment. �HUMAN: �Need air to breathe �Need water to drink �Need food to get nutrition �Use soil to grow crops �Use land to build shelter Human depend on non-living things �Need furniture, clothes, in their life appliances etc. to live.
1. Relationship between Living and Non-living Things: �OTHER ANIMALS: �All animals need air, water and food to live. �Animal use soil and water as habitats. �Some animals like insects, earthworms, moles, snakes etc. live in soil. �Some animals such as prawn, fish, wheal, oyster etc. lives in water. animals in soil animals in water
1. Relationship between Living and Non-living Things: �PLANTS: �Use sunlight, water and carbon dioxide from air to make food. �Need soil to grow on. �Plants such as water lily and water hyacinth use water as a habitat. QUESTION: Plants depend on non-living things How do living things (human/animals/plants) depend on non- living things?
What is an Ecosystem? All living and non-living things that exist and interact in one place is called ecosystem.
2. Mutual Dependence between Plants and Animals
Mutual Dependence �ANIMALS (dependence on plants): Animals depends on plants in many ways. Such as�Animals use oxygen given off by plants to breath. �Animals eat various parts of plants such as stems, leaves, roots, fruits as food to get energy. �Several animals like monkey, squirrel, insects etc. use plants for their shelter. �Birds make their nest on trees. �Human use plants to make their houses, furniture, book, pencils etc.
Mutual Dependence �PLANTS (dependence on animals): �For making food: Plant use carbon dioxide given off by animals to make food. �For nutrition: Dead bodies of animals become organic fertilizer and plant use this nutrition to grow. �For pollination: Animals such as birds, bees help plants in pollination. �Seed dispersal: Animals help plants in seed dispersal. Question: How do plants and animals depend on each other?
Some definition: �Pollination: Transfer of pollen from one flower to another flower so that plants can make new seeds. New plants grow from these seeds.
�Seed dispersal: � The transport of seeds away from the parent plant. � Seed dispersal helps plants to create new colonies.
�Parent plant/ mother plant: Parts or seeds of the plants from which new plants grow. �Colony: A group of plants or animals living or growing in one place. COLONY
3. Energy Flow: �Living things need energy for survival. �Plants get energy from the Sun. �Animals get energy from food (plants and animals). Eating and Being Eaten eaten by Sun eaten by grasshopper eaten by frog eaten by snake eagle
Energy Flow
Food Chain �Energy is passed from a plant to animals. The path of food energy in an ecosystem from plants to animals is called food chain. �There are many food chains in an ecosystem. �The food chain begins with the green plants (producer). �Small animals (consumer) are eaten by large animals (consumer).
Food Chain All animals directly or indirectly depend on plants for their energy. �A plants produces its own food using the energy of sunlight. �An insect eats the plant, and frog eats the insects. � In the same process the frog is eaten by a snake, and then the snake is eaten by an eagle. �Like this, energy is passed from a plant to animal and food chain is created.
Food Web �In any ecosystems, there are many food chains. Several food chains connected together is called a food web. �All the plants and animals are a part of several food chains. �For example: 1. A hawk might eat a mouse, a squirrel, a frog or some other animals. 2. The snake may eat a rabbit, a rat, or some other animals.
Questions (Energy Flow): �From where plants get energy? �From where animals get energy? �What is food chain? �What is food web? �What are the differences between food chain and food web? �How do animals depend on living things to get energy?
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