middle school science activities

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..

Extracting Metals in the Middle of the Activity Series - Metals such as iron, zinc, lead, copper, etc., are in the middle of the reactivity series. These are moderately reactive metals and are usually present as sulphides or carbonates. A metal is obtained from its ore..

Hold a bottle cork in one hand firmly and cut a thin slice with the help of a blade. Place the section in a drop of water on a glass slide and observe under a microscope. You will find cells, which are box-like and closely packed togethe..

Microscope - Parts and Working - You need to get acquainted with the usage of the microscope, for observing cells. On the screen is the figure of a light microscope. Study the parts and learn their name..

This is a prominent, spherical or oval structure found at the centre of the cell. It is the controlling centre of all cell activities and has been described as the brain of the cell. It regulates all metabolic and hereditary activities of the cell. The nucleus is composed of th..

Visit an agricultural institute where hybridization is done and study how: Plants are grown in artificial conditions Artificial cross-pollination is done Tissue culture is don..

Make solutions of the following substances: 'Borax', 'Blood', 'Milk', 'caustic soda', 'Lemon Juice', 'Bleaching powder', 'Tomatoes', 'Vinegar', 'detergent', 'Pure Water', 'Coffee', Baking Soda'. Put a drop of each of the above solutions on a watch-glass and test by adding a drop of litmus to i..

Show how nitrogen shares a covalent bond with hydrogen in the formation of ammonia (NH 3 ). Are all electrons involved in the bonding? Give the Lewis structure of the covalent bond als..

Photosynthesis - Some Activities - Following are some simple activities and experiments related to photosynthesi..

The transport of materials across the cell membranes with the help of energy is called active transport. Both diffusion and osmosis are passive transport mechanisms, not requiring energy. Active transport helps in the transport of ions across the membranes of the cells. The min..