THE SIDDIQUI ACADEMY

  SCIENCE CLASS 10TH CHAPTER-HOW DO ORGANISM REPRODUCE FORMULA & IMPORTANT POINTS Science Formulas Class-10 for chapter-How do organism Reproduce  Reproduction: Production of new generation of individuals of same species. Vegetative propagation in plants Plant undergoing vegetative reproduction propagates by a part of their body other than a seed. This is called  propagule . Vegetative reproduction is of different types.

  SCIENCE CLASS 10TH CHAPTER-LIFE PROCESS FORMULA & IMPORTANT POINTS Science Formulas Nutrition Process of obtaining food from the surroundings and using it for various metabolic activities by an organism. Steps of photosynthesis: During the process of photosynthesis, the following events occur : Absorption  of light energy  by chlorophyll . Conversion  of light energy to chemical energy and splitting of  water molecules into  Hydrogen  and  oxygen . H 2 O→2H +  + 2e -  +1/2 O 2 The above processes are considered as  light reaction . Reduction  of  carbon dioxide  to  carbohydrates . This is also known as  dark reaction . Conditions necessary for photosynthesis Sunlight Chlorophyll Carbon-dioxide Water These conditions are needed for  autotrophic mode of nutrition Site of photosynthesis Chloroplast (chlorophyll)containing organelles (i.e. plastic) which are found in large numbers in plant and algal ...

  SCIENCE CLASS 10TH CHAPTER-METAL AND NON-METAL FORMULA & IMPORTANT POINTS Science Formulas Class-10 for chapter-Metal and non-metal  Metals:  The elements, which have the properties of luster, malleability and ductility, high thermal and electrical conductivities. The metals have a good tendency to loose. electrons. Non-metals:  The elements, which do not have the above, mentioned properties.These have a good tendency to gain electrons. Metalloids:  The elements having the properties of metals as well as non-metals. Difference between metals and non-metals      Properties Metals Non-metals Physical Properties     1. State Metals are solids at ordinary temperature. (except mercury, which is a liquid.) Non-metals exist in all the three states, that is, solid, liquid and gas. 2. Lustre They possess lustre of shine. They possess no lustre. (except lodine and graphite.) 3. Malleability and Ductility Metals are generally malleable and du...

  SCIENCE CLASS 10TH CHAPTER-CHEMICAL REACTION AND EQUATION FORMULA & IMPORTANT POINTS Science Formulas Difference between Physical change and Chemical change S.NO. PHYSICAL CHANGE S.NO. CHEMICAL CHANGE (i) Those changes in which no new substances are formed are called physical changes (i) Those changes in which the original substances lose their chemical nature and identity and form new chemical substances with different properties are called chemical changes (ii) It is a temporary change (ii) It is a permanent change (iii) It is easily reversible (iii) It is usually irreversible (iv) In a physical change the mass of substance does not alter (iv) In a chemical change the mass of the substance does alter Types of Chemical Reactions: Addition or combination reactions:  Two or more substances combine to form a single substance. CaO+Co 2 →CaCO 3 Decomposition reaction:  One chemical substance splits to give two or more substances either by heat energy (Thermolysis) or li...