024 phototropism
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Plants exhibit phototropism, the growth of plant stems or roots toward or away from light. An experiment was conducted using chickpea or green gram seedlings in a dark box with a single hole for light entry, which demonstrated that after 3 hours the seedlings bent toward the direction of the light source, showing the principle of phototropism. For monocot seedlings it may take longer to observe this response due to the coleoptile structure.
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This document describes an exercise to teach children the importance of washing their hands with soap and water. The exercise involves having children place their hands on paper after washing with just water or soap and water, so they can see the difference - hands washed with just water will leave dirty marks while soap and water will leave clean hands and clean paper. The goal is to help children understand good hygiene practices through a hands-on demonstration.
064 bread mould
Fungi such as Rhizopus, Aspergillus, and Penicillium cause bread and fruits to decay by infecting them with spores. To observe these mould spores under a microscope, scrapes of fungus-infected bread or a rotten orange are placed in water on a glass slide, smeared, and viewed under the microscope.
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082 voluntary muscles and reflex action
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100 plant a tree
This last exercise is that we shall plant a tree in our school and or home and watch it grow. By planting trees we plant our oxygen.
098 carbon footprint
Calculating a carbon footprint involves estimating the greenhouse gas emissions caused directly and indirectly by an individual or organization. For children, it involves asking questions about their daily routines like how they get to school, food consumption, use of lights and electronics, and recycling habits to determine their footprint and discuss ways to reduce it, such as using reusable lunch boxes instead of plastic bags or turning off unused devices. Taking the carbon footprint quiz again after implementing new practices helps children see the concrete results and deepen their understanding of environmental impacts.
097 shrinking resources
With increasing population and shrinking resources the demand for resources is to grow into enormous proportions.
094 behaviour of paramoecium
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090 transpiration
Transpiration is a process by which water vapours escape from the plant surfaces like leaves, stem, cuticle etc
089 taste buds
The human tongue tastes different tastes and these locations are distributed on the tongue. Come let us taste to see which part of the tongue taste what.
073 the iris diaphragm
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070 demonstration of centrifugal force
This document describes an experiment to demonstrate centrifugal force using common household items. A plastic water bottle is cut open and holes are drilled into it. String is tied through the holes and to a pencil to create a spinning device. Wet cloth pieces placed inside the bottle are spun and centrifugal force throws water from the cloth, drying them without the use of a traditional clothes drier. Centrifugal force is the principle behind how clothes dryers work.
069 breathing mechanism
This document describes a simple experiment to demonstrate the principles of inhalation and exhalation using common household items. The experiment involves cutting off the bottom of a plastic bottle and attaching a rubber sheath. Two small balloons are inserted into the bottle through a drinking straw to represent lungs. Pulling the rubber sheath outward fills the balloons with air to demonstrate inhalation, while pushing it inward releases air from the balloons to demonstrate exhalation.
067 biodome
This document provides instructions for creating a biosphere in a plastic bottle by adding pebbles to the bottom, soil on top, making a trench to plant seeds in, covering the seeds with soil, watering until water collects in the pebbles below, sealing the bottle in a bag, and observing plant growth over time. The materials needed are a clear plastic bottle, pebbles, soil, seeds, water, a ruler, and large sealable storage bags or jars.
066 fermentation (lactic acid)
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065 fermentation (alcoholic)
This document provides instructions for demonstrating how yeast converts sugars into carbon dioxide and ethanol through a simple experiment. The experiment involves adding yeast, sugar, and warm water to a bottle or test tube, sealing it with a balloon, and observing the balloon inflate over 30 minutes as the yeast produces carbon dioxide from fermenting the sugar. Testing the gas in the balloon with lime water confirms it is carbon dioxide produced by the yeast during alcoholic fermentation.
063 tooth decay
This is an exercise with reference to health and hygiene. To make children realise tooth decay starts with improper dental care.
058 culture of fruit fly for genetic studies
Fruit flies swarm in every orchard during the hot months. They thrive on the fruits that fall premature from the tree. August through October, you can also find them buzzing around any bowl of fruit on your kitchen table. They especially love bananas
056 chromatography
Chromatography is a method of separation of substances based on their different mobility in a given stationary support.
050 circadian rhythms biological clocks
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024 phototropism
- 1. 024 PHOTOTROPISM: RESPONSE OF PLANTS TO LIGHT This experiment explains the principle of plants’ response to light MATERIALS REQUIRED Chick pea or green gram seedlings about 5 cm in height. A dark box (old cardboard box) with a hole on only one side so that light enters the box only through that hole. Chick pea Green gram
- 2. Keep observing. After 3 hours, the seedlings bend towards the direction of light showing phototopism. If you use monocots, it will take some time before the plant bends towards light due to the coleoptiles.