SSC 2015 EXAM GUIDANCE

Staff Selection Commission CGL 2015 is the exam which provide the jobs in Central Government.The exam for this year will be conducted in the month of Aug 2015. Be prepared for the battle. I am starting this blog for the freshers who donot have an idea about SSC.I will come up with news of SSC daily.

SSC CGL decided to conduct the exam online for the coming years.

Much awaited SSC CGL 2015 notification has come out


Hai SSC CGL Aspirants i am going to start the preparation for general awareness which is useful for the coming exam in the month of Aug 2015.I will be preparing notes from each topic by taken into the account of ncert text books Daily i will start the putting the notes in my blog people who are interested can follow my blog. Firstly i will start with General science.


Hai friends as i said i will come up with the notes Today i am starting with General Science of class 7th.


                                                              Nutrition in Plants

• The components of food are classified as Carbohydrates, Proteins, fats, Vitamins and Minerals.
• These are treated as nutrients of food
• Plants prepare the food by themselves with the use of water, carbon dioxide and minerals.
• The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic Eg Plants
• heterotrophs which take the food that is readily available
• In the plants food is prepared in leaves
• Roots absorb water from soil and transport to leaves where the synthesis takes place.
• Carbon dioxide in air is taken through the tiny pores present on the surface of leaves.These pores are surrounded by guard cells called stomata.
• livings organism are made of tiny particles which are called as cells
• cell is covered by thin outer boundary called the cell membrane
• central part of a cell is called nucleus
• nucleus is surrounded by jelly like substance called cytoplsm 
• chlorophyll is the green pigment present in leaves
• synthesis takes place in the presence of sunlight so called photosynthesis.
• Carbon dioxide + water---------carbohydrates+oxygen
• Carbohydrates are converted into starch when the oxygen is released
• photosynthesis also takes place in different colors of leaves
• Algae is green in color due to chlorophyll present in it.
• Cuscata is a plant which is not having chlorophyll but depend on another plant .The plant which it climbs is called host
• Insect eating plants are called as insectivorous plants Eg Pitcher
• The bacterium called Rhizobium takes the atmospheric nitrogen and convert it into soluble form

                                                            Nutrition in Animals

• In the process of digestion, complex substances are broken down in simpler substances.
• Star fish depends on the food that is covered by hard shells containing calcium carbonate.
• In human body there will be a alementary canal which constitutes various parts namely buccal cavity, food pipe or oesophagus, stomach, small intestine,large intestine ending in rectum and the last one is Anus.
• Salivary glands, the liver and the pancreas secrete digestive juices.
• The glands with digestive track will form digestive system.
• Ingestion means taking food
• Starch is broken down into sugar by use of saliva.
• If  we donot brush after taking the food the sugars present in the left over food causes acids which in turn damages the teeth called tooth  decay
• Stomach receives food from one side and send to small intestine from the other end.
• Small intestine length 7.5mts long
• liver is present at the top of abdomen and is the largest gland in the human body
• liver is reddish brown color
• it secretes bile juice that is stored in a sac called gall bladder
• Pancreas is cream in colour
• Villi present in small intestine will increase the absorption of digested food.
• Undigested food will be transfered to large intestine
• Large intestine is wider and shorter than small intestine
• Large intestine size in 1.5mts
• The unwanted things are moved to anus through the process called egestion
• Animals like buffaloe will store the food in the place called Rumen.
• Partial digestion takes place in such animals called as CUD
• Classification of above animals are called as Ruminants.
• Amoeba will not have any intestines it does the process by means of pseudopodia.

                                                            FIBRE TO FABRIC

• Fibre is prepared from plants
• Wool is prepared from sheep hair(Fleece)
• Preparing of wool involves different stages namely shearing ,scouring in tanks,scouring by machines,rolling into yarn,
• The disease by doing such kind of work is ANTHRAX
• The process of taking out threads from the cocoon for the use as silk is called reeling the silk

                                                                      HEAT 

• Hottness of a an object is nothing but temperature.
• Generally temperature is measured with Thermometer.
• Thermometer used to measure our body is called clinical thermometer.
• A clinical thermometer recall temperature from 32 degree to  42 degrees
• The normal temperature of human body is 37degree
• Laboratory thermometer will measure  -10 deg to  110 degree
• General principle heat flows from hotter object to colder object.
• the above principle generally called conduction
• Insulators donot allow the heat to pass through it

                                                            Acids Bases and Salts

• The substance which taste sour contain acids which are acidic in nature
• latin word for acid is acere
• Substances which are bitter in taste and feel soapy called bases Nature of such substances will be Basic.
• Indicators are those which changes by adding acids or bases
• Litmus is natural inicator
• it changes to red when acids are added, turns blue when added to basic solution.
• if there is no change in color it is neutral solution
• The reaction between acid and base is known as neutralisation
• During neutralisation salts and water are produced with the evolution of heat

                                                  Physical and Chemical changes

• Properties that are related to shape,size, colour  and state of substance called physical properties
• Change in physical properties is called physical change.
• No new substance will be formed when physical change take place and it is reversible.
• In any change if more than one susbtance is formed it is chemical change and reaction is called chemical reaction
• In order to avoid rust on iron, a layer of zinc is deposited on iron which is called as galvanisation.
• Crystallization is the example of Physical change