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CBSE Notes Class 6 Science Chapter 10 Living Creatures: Exploring Their Characteristics
Living organisms are all around us, from plants and animals to tiny microorganisms. This chapter explains the basic characteristics that make living things different from non-living things.
Students learn that living organisms grow, breathe, reproduce, move, and respond to their surroundings. They also need food and water to survive, and these features are known as life processes. This chapter helps students develop a better understanding of life and nature. Students can refer to the Class 6 Science Notes for chapter-wise explanations and quick revision of important concepts related to living organisms.
1.0Living Creatures: Exploring Their Characteristics Class 6 Science Chapter 10 - Revision Notes
Living organisms show characteristics such as nutrition, growth, movement, respiration, excretion, response to stimuli and reproduction. This chapter explores plant growth, responses to light, and the life cycles of bean plants, frogs and mosquitoes.
Key Concepts
- Concept of Living Organisms and Non-Living Things: Living organisms require food, water, and air to survive, in case of non-living items like tables or chairs do not need these inputs.
- Core Characteristics of Life: All living things exhibit key traits including needing nutrition, growing from within, moving independently, responding to external stimuli, respiring to release energy, excreting poisonous wastes, reproducing offspring, and following a limited life span.
- Autotrophic and Heterotrophic Nutrition: Green plants synthesize their own food through photosynthesis using carbon dioxide, water, minerals, and sunlight, making them autotrophs. Whereas animals can't manufacture their own food and must obtain it from plants or other animals, making them heterotrophs.
- Growth and Cellular Structure: Growth in living organisms occurs internally from a single cell as the total number of cells increases over time.
- Movement in Plants and Animals: Animals move independently from place to place or shift body parts, such as a frog jumping into a pond. Plants remain fixed in soil, but it shows movement in response to directional factors like light.
- Response to External Stimuli: Living things react to environmental changes like heat, light, touch, sound, smell, taste, water, and chemicals.
- Excretion of Metabolic Wastes: Organisms eliminate the toxic byproducts formed during life processes, such as humans releasing sweat containing water and salts or plants exuding excess water droplets on leaves.
- Life Cycles and Metamorphosis: Organisms undergoes structured growth stages from birth or germination through adult forms, with some animals like frogs undergoing metamorphosis to transform larvae into adults.
Photosynthesis:
Green leaves act as food factories for plants. They use sunlight, water and carbon dioxide to make sugar and release oxygen. Photosynthesis takes place in the presence of light,but in case of respiration it can happens on both day while respiration continues both day and night.
Insectivorous Plant (Drosera):
Drosera has saucer-shaped leaves with sticky, hair-like projections of different lengths. When an insect lands on a leaf, the hairs fold inward and trap it.
Growth of Shoots and Roots:
In the case of a seedling, the shoot grows upwards towards the light, while root grows downwards into the soil. Even if the seedling is placed upside down, the shoot bends upwards and the root grows downwards.
Plant Response to Light:
When a plant is placed inside a box with a small hole on one side, light enters through the hole. The shoot bends towards the direction of light, while the root continues to grow downwards.
Sensitivity in Plants:
The touch-me-not plant folds its leaves when touched is an example of Plants responding to changes in their surroundings. while the leaves of the Amla plant fold together after sunset in response to changes in light.
Jagadish Chandra Bose:
Indian scientist Jagadish Chandra Bose invented the crescograph to measure plant growth. He also studied how plants respond to stimuli such as light, heat, electricity and gravity.
Human Excretion:
Sweat contains water and dissolved salts. When sweat dries, it may leave white patches on clothes, especially around the armpits during summer. Urine is another important waste product removed from the body.
Plant Excretion:
Plants can release excess water through their leaves. Small water droplets may appear on the leaves of plants such as grass and roses.
Life Cycle of a Bean Plant:
A bean plant passes through five main stages: seed, seed germination, growth of leaves, appearance of flowers, and formation of fruit pods containing new seeds.
Life Cycle of a Frog:
Frogs lay eggs in ponds or slow-moving streams. The eggs form a cluster called spawn and are protected by a jelly-like substance. The stages are spawn, embryo, tadpole with a tail, tadpole with legs, froglet and adult frog. The change from tadpole to adult is called metamorphosis.
Life Cycle of a Mosquito:
A mosquito develops through four stages: egg, larva, pupa and adult. The first three stages occur in water, especially stagnant water. Removing stagnant water from coolers and open containers helps prevent mosquito breeding.
2.0Terminologies to know - Living Creatures: Exploring Their Characteristics
- Adaptation: The ability of living organisms to adjust themselves to survive in their surroundings.
- Biotic Component: All living organisms present within an environment.
- Habitat: The natural environment or physical place where an organism lives and grows.
- Aquatic Habitat: A water-based natural living environment where organisms exist.
- Autotroph: An organism, such as a green plant, that manufactures its own food using inorganic substances.
- Heterotroph: An organism that cannot make its own food and depends on other organisms for nutrition.
- Stimulus: Any environmental change, such as light, temperature, touch, or sound, that evokes a response in a living organism.
- Crescograph: A specialized instrument invented by Jagadish Chandra Bose to record plant responses to stimuli and measure growth rates.
- Excretion: The biological process of removing metabolic waste products and toxic materials from an organism's body.
- Metamorphosis: The process of biological development where a larva undergoes drastic structural transformations to become an adult.
- Spawn: A cluster of frog eggs held together by a protective jelly-like substance in water.
- Respiration: The metabolic process of burning food inside living cells to release usable energy.
3.0Learning Guide for Class 6 Science Living Creatures: Exploring Their Characteristics- Chapter 10
Textbook Experiments and Activities:
- Demonstration of Plant Growth: Wheat seeds sown in moist soil and watered daily emerge as tiny seedlings within a few days and grow into larger plants over several weeks.
- Seedling Growth Orientation Experiment: Seedlings attached to glass plates with cotton thread in beakers demonstrate that shoots grow upward and roots grow downward regardless of whether the seedling is placed upright or inverted. Placing the beaker inside a cardboard box with a single circular hole shows the shoot bending toward the light source.
- Abiotic Requirements for Seed Germination: Testing bean seeds in four pots reveals that pot A without water and pot B with excess water fail to germinate. Pot C with moist soil in a dark location germinates successfully, showing that direct sunlight is not necessary for bean seed germination. Pot D with moist soil in sunlight also germinates normally.
Everyday Examples and Observations:
- Humans pulling their hand away instantly when accidentally touching a hot object as an involuntary response to a heat stimulus.
- White salt patches appearing on cotton shirts near armpits in summer due to evaporated sweat.
- Dew-like droplets appearing on grass and rose leaves as plant excretory secretions.
- Spraying kerosene oil on stagnant water in coolers or open containers to disrupt mosquito breeding.
Safety Rules and Revision Tips:
- Safety Rule: Ensure soft cotton thread is used gently when tying seedlings to glass plates so that delicate roots and stems are not damaged.
- Safety Rule: Prevent stagnant water accumulation in coolers and open pots to avoid mosquito breeding and vector-borne diseases.
- Revision Tip: Remember the MRS GREN life processes mnemonic (Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition) to quickly recall all core characteristics of living things.
4.0Explore Chapter-wise Class 6 Science Notes
5.0Additional Study Materials for Class 6 Science
6.0Find the Right Study Resources for Class 6
7.0Key Features of CBSE Class 6 Science Notes Chapter 10 : Living Creatures – Exploring Their Characteristics
- The Foundation of Biology: This chapter shifts focus from looking at animals to understanding the biological systems that drive them. it builds a critical base for understanding genetics, physiology, and ecology.
- Visual Strategy Guides: Features high-quality diagrams of diverse habitats and structural adaptations, helping students visualize how life survives in extreme deserts versus deep oceans.
- Backyard-to-Biosphere Connectivity: Bridges the gap between a pet at home and wildlife in the forest—explaining the universal needs of all living beings, from tiny insects to giant trees.
- Rapid Recall Mind Maps: Includes "Life vs. Non-Life" checklists and decision trees that help students classify objects based on their ability to respond to stimuli and reproduce.
- Competency-Based "Nature Challenges": Includes observation-based scenarios, such as: "Predict the adaptations of an animal found in a high-altitude, snowy mountain based on its physical traits."
- The Adaptive Mindset: Develops the skill of ecological reasoning, teaching students that every physical feature of a creature is a specialized tool designed for survival in its specific home.