Pathik — CBSE Class 6–12 Notes, Worksheets & MCQ Quizzes

  Chapter 2: Nutrition in Animals Worksheet   I. Multiple Choice Questions 1. What is the process of taking food into the body called? (a) Digestion (b) Ingestion (c) Absorption (d) Egestion Answer: (b) Ingestion 2. Which organ produces bile? (a) Pancreas (b) Stomach (c) Liver (d) Small intestine Answer: (c) Liver 3. Where does the digestion of starch begin in humans? (a) Stomach (b) Small intestine (c) Buccal cavity (d) Large intestine Answer: (c) Buccal cavity 4. Which type of teeth is used for piercing and tearing food? (a) Incisors (b) Canines (c) Premolars (d) Molars Answer: (b) Canines 5. What are the finger-like projections present in the small intestine called? (a) Pseudopodia (b) Villi (c) Alveoli (d) Cilia Answer: (b) Villi 6. Which organ mainly absorbs digested food? (a) Stomach (b) Large intestine (c) Small intestine (d) Oesophagus Answer: (c) Small intestine 7. Which acid is present in the stomach? (a) Nitric acid (b) Hydrochloric acid (c) Sulphuric acid (d)...

  Chapter 2: Nutrition in Animals 1. Nutrition in Animals Animals obtain food from plants directly or indirectly. Animal nutrition involves: 1. Nutrient requirement 2. Mode of intake of food 3. Utilisation of food in the body The main steps of nutrition are: Ingestion → Digestion → Absorption → Assimilation → Egestion. 2. Modes of Taking Food Different animals take food in different ways: - Humming-bird/bee: sucking nectar - Python: swallowing prey - Butterfly: siphoning - Housefly: sponging - Lice: sucking - Some animals capture and swallow their food. 3. Human Digestive System The alimentary canal consists of: Buccal cavity → Oesophagus → Stomach → Small intestine → Large intestine → Rectum → Anus. Important digestive glands: - Salivary glands - Liver - Pancreas 4. Digestion in the Mouth - Food enters the body through the mouth. This is called ingestion. - Teeth cut, tear and grind food. - The tongue mixes food with saliva and helps in swallowing. - Saliva breaks down starch into...

  Chapter 1: Nutrition in Plants Worksheet  A. Multiple Choice Questions  Organisms that prepare their own food are called: (a) Heterotrophs (b) Autotrophs (c) Parasites (d) Saprotrophs The green pigment present in leaves is: (a) Starch (b) Chlorophyll (c) Glucose (d) Protein Which gas is taken in by plants during photosynthesis? (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Hydrogen Tiny pores present on the surface of leaves are called: (a) Vessels (b) Stomata (c) Veins (d) Root hairs The food produced during photosynthesis is mainly stored as: (a) Protein (b) Fat (c) Starch (d) Minerals Which of the following is a parasitic plant? (a) Rose (b) Cuscuta (c) Mango (d) Grass Which plant traps and digests insects? (a) Cuscuta (b) Pitcher plant (c) Mango (d) Pea Organisms that obtain nutrients from dead and decaying matter are called: (a) Autotrophs (b) Parasites (c) Saprotrophs (d) Hosts Which bacterium helps in fixing atmospheric nitrogen? (a) Lactobacillus (b) Rh...

  Class 7 Science – Chapter 1 Nutrition in Plants 1. Nutrition Nutrition is the mode of taking food by an organism and its utilisation by the body. Food provides nutrients that help organisms: grow and develop, repair damaged body parts, maintain the body, and obtain energy for life processes. Nutrients The main components of food are: Carbohydrates Proteins Fats Vitamins Minerals 2. Modes of Nutrition Autotrophic Nutrition The mode of nutrition in which organisms prepare their own food from simple substances is called autotrophic nutrition. Green plants are autotrophs. They use carbon dioxide, water and minerals to prepare food. Sunlight provides the energy needed. Heterotrophic Nutrition Organisms that obtain food from other organisms are called heterotrophs. Examples: humans, animals and some plants. 3. Photosynthesis Photosynthesis is the process by which green plants prepare food using carbon dioxide and water in the presence of sunlight and chlorophyll. Requirements of Photos...

  Chapter 1 – Answer Key A. MCQs (b) Crest (c) Moon (d) Deep sea floor (c) Petroleum (c) Waves (b) Mid-ocean ridges (c) Decline in fish stocks (c) Tide (d) Sea routes (c) Rising sea temperatures (c) Both II and III I is incorrect because waves mainly help in mixing ocean water, not specifically by distributing heat and nutrients. II and III are correct. 12. Match the following A. Crest → IV. The highest point of a wave B. Trough → III. The lowest point between two waves C. Wavelength → II. The distance between two successive crests or troughs D. Wave height → I. The vertical distance between crest and trough Answer: (b) A-IV, B-III, C-II, D-I 13. Statement-based question Answer: (a) Both statements are correct. B. Fill in the Blanks Seamounts are large elevated areas on the ocean floor, often formed by extensive volcanic eruptions. Abyssal plains are vast, flat areas of the deep ocean floor found at depths between 3,000 and 6,000 metres. The ocean floor is generally divided into th...

  Chapter 12: Beyond Earth Chapter 11: Nature's Treasures Chapter 10: Living Creatures: Exploring their Characteristics Chapter 9: Methods of Seperation in Everyday Life Chapter 8: A Journey Through States of Water Chapter 7: Temperature and its Measurement Chapter 6: Materials Around Us Chapter 5: Measurement of Length and Motion Chapter 4: Exploring Magnets Chapter 3: Mindful Eating: A Path to a Healthy Body Chapter 2: Diversity in the Living World Chapter 1: The Wonderful World of Science

  Chapter 12: Beyond Earth Worksheet  SECTION A:  I. Multiple Choice Questions  Which is the brightest star in the night sky? (i) Pole Star (ii) Sirius (iii) Alpha Centauri (iv) Sun The star that appears almost stationary in the northern night sky is called: (i) Sirius (ii) Betelgeuse (iii) Pole Star (Dhruva Tara) (iv) Rigel A group of stars forming a recognizable shape or pattern in the sky is called a: (i) Galaxy (ii) Solar System (iii) Constellation (iv) Asteroid Belt The constellation Orion is also known by what traditional name in India? (i) Saptarishi (ii) Vyadha (iii) Dhruva (iv) Akash Ganga Which celestial body is known as the "Evening Star" or "Morning Star"? (i) Mars (ii) Jupiter (iii) Venus (iv) Mercury The main source of energy for the Earth and the entire Solar System is: (i) The Moon (ii) The Sun (iii) Pole Star (iv) Jupiter Which of the following is not a planet in our Solar System? (i) Neptune (ii) Pluto (iii) Uranus (iv) Saturn Small rocky bodies ...