Biology - A living Science

How does milk change to curd?

2008-06-01T11:50:00.004+05:30

Objective: To demonstrate the need for starter to convert milk into curd.Materials required: curd (as a starter “jaman”)(20 mL), milk (500 mL), 2 beakers, a spoon, heat source for heating the milk, measuring cylinder, thermometer. Procedure: Take two beakers and label them as A and B. You may label them with a sketch pen or a marker pen. Put 250 mL of milk in each beaker. Heat the milk in

Make a PULSE METER!

2008-06-01T11:35:00.004+05:30

Objective: Visual counting of pulse by ‘pulse meter’!Materials required: a stopwatch, a drinking straw or a piece of broomstick, some plastic putty or modelling clay.Procedure: Hold the inside of your left wrist towards you. Place the index and middle fingers of your right hand on the inner side of your left wrist (on the thumb side). Feel the pulse. Now, place a small piece of putty/ modelling

Anchor of the plants!

2008-05-30T21:05:00.003+05:30

Objective: To observe and identify the types of roots present in plants.Materials Required: A wheat, Maize or rice plant; a plant of pea, balsam or marigold; a hand lens. Procedure: Uproot the plants carefully so that the roots are not broken. Wash the roots with water to remove any soil sticking to the roots. Now observe the roots and answer the following questions: 1. Do all these roots have

Do plants drink water?

2008-05-30T20:56:00.006+05:30

Objective: To show that water absorbed by the roots is transported in a plant from the stem to leaves and flowers. Materials Required: A white coloured flower of balsam, carnation or rose, two beakers, red and blue ink, a sharp blade and water. Procedure: Fill the beakers with water. Add a few drops of red ink into one beaker and a few drops of blue ink in the other beaker. Take a flower with

The advertising Petals!

2008-05-30T19:35:00.007+05:30

Objective: To learn about the parts of a flower.Materials Required: Flower of Hibiscus (china rose), rose, balsam, salvia etc.Procedure: Observe the flower and read the clues to the crossword puzzle to identify the parts of a flower. Clues:

Riddle-1

2008-05-30T19:28:00.004+05:30

1. I have teeth to grind what you ate And a tongue to taste and masticate With saliva from the salivary glands Can you guess who I am? 2. I form a passage From the mouth to the stomach Food pipe is my common name Are you ready to play the game? 3. I churn the food With some acidic juice And then the proteins I digest Are you ready to

Am I a producer or a consumer?

2008-05-30T12:20:00.002+05:30

Objective: To understand the relationship between the biotic components of an area. (Producer and consumer, Autotrophs and heterotrophs, Herbivores and carnivore and omnivore) Materials required: Pictures/ Drawings of plants and animals found in aquatic, terrestrial and amphibious habitats; glue; scissors; small pieces of magnets; a metal board (made of iron);

Where does manure come from!

2008-05-30T12:12:00.001+05:30

Introduction- You may have seen the gardener putting manure in the flower beds.Do you know what it is and where it comes from? Objective-To study the role of decomposers in the environment. Materials required- Vegetable peels, rotten vegetables and fruits, dry leaves, cow dung etc. Procedure- Dig one circular pit that is about one foot deep and one foot in diameter. Fill the pit with vegetable

If the roots get “drowned”, the plant is going to die!

2008-05-30T11:57:00.001+05:30

Objective: To show that the roots of the plants need air for respiration. Materials required: Two potted plants such as balsam, rose, sunflower etc. that are similar in size, some wet clay or some plastic putty. Procedure: Take two potted plants A and B. Block the hole at the bottom of one of the pots (pot-B) using wet clay or plastic putty. Leave the plants in open space where there

In this kitchen, microbes cook!

2008-05-30T11:46:00.001+05:30

Objective: To find out the appropriate temperature for the setting of curd. Materials required: curd (as a starter )(100 mL), milk (1 litre), 5 beakers, a spoon, heat source for heating the milk, measuring cylinder, and thermometer. Procedure: Take five beakers and label them as A, B, C, D, and E. You may label them with a sketch pen or a marker pen. Put 200 mL of milk in each of the five

Are you aware of your surroundings?

2008-05-30T11:01:00.001+05:30

Objective: To identify the living (biotic) and non-living (abiotic) components of the environment.Given here is a crossword puzzle. Read the clues and fill up the spaces, using one alphabet in each square to make words/terms that represent components of the environment. Then categorise these ten answers into living (biotic) and non-living (abiotic) components of the environment.The clues: 1.