VII GRADE

Finally, its time for you to get your eyes out of books and have a look around the beautiful nature around us.  I wish you all the best for your summer vacation. May all the happiness in the world embrace you, let your fun be unlimited with friends and family.  Bon voyage !

Ch2. Nutrition in Animals # Human Digestive System FIG-1. DIGESTIVE SYSTEM IN HUMANS Mind Map: Concept Map: KEYWORDS: Absorption Amino acid Amoeba Assimilation Bile Buccal cavity Canine Cellulose Digestion Egestion Fatty acid Food Vacuole Gall bladder Glycerol Incisor Ingestion Liver Milk Teeth Molar Permanent teeth Oesophagus Pancreas Premolar Pseudopodia Rumen Ruminant Rumination Salivary gland Villi Saliva Notes: # Ingestion:- Food is taken into the body through the mouth, the process of taking food into the body is called ingestion. #Digestion:- The breakdown of complex food substances into simpler food substances is called digestion. #Absorption:- The digested food can be passed into the blood vessels through the walls of the intestine, this process of taking up of nutrients into the blood stream is called absorption. #Assimilation: The Absorbed substances are transported from the blood vesse...

CH. 1 NUTRITION IN PLANTS: CH. 2 NUTRITION IN ANIMALS:

Temporary preparation of Stomata   (on the ruled page/ right hand side) Aim: To prepare a temporary slide and observe stomata under a compound microscope. Materials required: Watch glass, dropper, forceps, stain- safranin, glycerine, brush, needle, petri dish, glass slide, cover slip, compound microscope. Procedure: Fold the leaf and carefully tear along the bruised area of the lower side of the leaf. We can see a colourless narrow border along the torn edge. Carefully pull out the thin membranous transparent layer from the lower epidermis using a forceps. Put the epidermis into a watch glass containing distilled water. Take few drops of Safranin solution using a dropper and transfer this into another watch glass. Using a brush transfer the epidermis into the watch glass containing the Safranin solution. Keep the epidermis for 30 sec in the Safranin solution to stain the peel. To remove excess stain sticking to the peel, place it again in the watch glass containin...

WORKSHEET 1 NUTRITION IN PLANTS Q.1 Very short answer type questions: a.) Who coined the term 'photosynthesis'? b.) In which form is carbohydrate stored in the leaves of the plants? c.) The presence of starch is tested by which solution? d.) Which pigment in leaves trap the sunlight (solar energy)? e.) Name the vessel that transports water from the roots to the leaves? f.) What are lichens made up of? g.) Where does Rhizobium live? h.) Name the gas which plants cannot take through leaves? i.) Give two examples of: Parasitic plants Insectivorous plants symbiotic plants Q.2 Short answer type questions: a.) Why are green plants called Autotrophs? b.) What are the raw materials required for photosynthesis and from where are they obtained?      

Q. Solutions to Boojho and Paheli’s questions from the text: (NCERT) 1. Boojho wants to know how plants prepare their own food. Ans: Plants prepare their own food by taking up raw materials from the surrounding like carbon dioxide (co2), water, and minerals in the presence of sunlight by a process known as photosynthesis. 2. Paheli wants to know why our body cannot make food from carbon dioxide, water and minerals like plants do. Ans: Our bodies do not have chlorophyll which is required for the process of photosynthesis to make food from carbon dioxide, water and minerals like plants do. 3. Boojho wants to know how water and minerals absorbed by roots reach the leaves. Ans: Water and minerals absorbed by the roots are transported to different parts of the plants through pipe like structures known as vessels that run throughout the roots, stem and leaves of the plants. 4. Paheli wants to know what is so special about the leaves that they can synthesize food bu...

CH 1 NUTRITION IN PLANTS # Mind Map:  # Concept Map: #flow chart for nutrients: KEYWORDS: 1.)   Nutrition - is a process by which organisms take in the food and utilize it in order to survive. Based on the mode of nutrition organisms can be divided into two categories. 2.)   Autotrophic Organisms  - They can prepare their food by themselves most green plants are autotrophic in nature. 3.)   Heterotrophic Organisms  - They depend upon other organisms for their food such as animals 4.)   Parasitic Plants  - Some plants live on another plant for their nutrition. These are called parasites. The plants on which these parasitic plants survive are called the host. For Example, cuscuta is a parasitic plant. 5.)   Insectivorous Plants  - Some plants depend upon insects for the food and thus are called Insectivorous. The leaves of these plant...