Activity - I
Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is through the stom..
Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is through the stom..Activity I
Hold a pin erect on a pile of papers. Keep another pin next to it upside down in such a way that its flat head rests on the pile. Press both these pins down by placing a flat object such as duster. We observe that pin which is erect pierces through the pile of paper..
Hold a pin erect on a pile of papers. Keep another pin next to it upside down in such a way that its flat head rests on the pile. Press both these pins down by placing a flat object such as duster. We observe that pin which is erect pierces through the pile of paper..Activity
Take hydrated copper (II) sulphate crystals in a test tube and heat. The blue crystals in the test tube start turning white on heating. Water vapours released on heating condense on the cooler part of the test tube. Collect the water drops in a dish. The crystalline copper sulphate turns to a whit..
Activity
How can you make soap at home or in class by using any vegetable oil, caustic soda and common sal..
Activity
Take a new iron nail, a gold item (ring or chain) and a silver item (ring or chain) during rainy weather. See that these are exposed to the effects of moist weather for a few days (3 to 4 days). 1) What changes are observed to all these items in the moist air? 2) How will you know which metal is ..
Photosynthesis - Some Activities
Following are some simple activities and experiments related to photosynthesi..
Activity II
Hold your bag with a strap made of a thin but strong string. Now lift the same bag with another strap made of a wide cloth band. You will find that carrying a school bag with a wide cloth band is more comfortable than carrying the same with a thin strip. This is because in the second case the weigh..
Hold your bag with a strap made of a thin but strong string. Now lift the same bag with another strap made of a wide cloth band. You will find that carrying a school bag with a wide cloth band is more comfortable than carrying the same with a thin strip. This is because in the second case the weigh..Photosynthesis - Some Activities
The occurrence of starch in the leaves proves that photosynthesis has taken place. Starch can be tested with the help of iodine solutio..
Extracting Metals towards the Activity Series
Extracting Metals towards the Top of the Activity Series - Metals such as sodium, magnesium, calcium, aluminium high up in the reactivity series are very reactive and cannot be obtained from their compounds by heating with carbon. This is because these metals have more affinity for oxygen..
Impact of Man's Activities on Environment
The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating laye..
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