Building Science concepts through real experiences.
During daytime, plants take in carbon dioxide and release oxygen in the process of photosynthesis in the presence of sunlight. However, they even respire simultaneously and hence also take in oxygen and release carbon dioxide. But the production of oxygen is more than the production of carbon dioxide. Hence,…
Burning Cotton smells like Burning Paper, whereas burning wool smells like burning hair. Why? Ans. Cotton and paper, both are plant products and they both contain an organic compound named ‘Cellulose’. So while burning cotton and paper, when this cellulose is burnt it gives out a similar characteristic smell. Hence…
The most common culprit for Taj Mahal turning Yellow is iron, which when exposed to water, acids or bleach, begins to oxidize and turns it yellowish. The pollution from local factories and oil refinery at #Mathura are also to blame for. These factories produce pollutants like Sulfur Dioxide and Nitrogen…
We often see changes around us and get confused about the change being a Physical or a Chemical changes .When leaves become OLD they become YELLOW and fall. Is this a Physical or is it a Chemical changes ? In autumn when we see dry and yellow leaves falling all…
Weak and Dilute Acids – What’s the difference? People often think that weak and dilute acids are just the same. This confusion is due to their literal meaning. However, are they actually the same? Watch out our video to understand the difference and the factors that separate these two from…
If LPG is an odourless gas, then how do we detect a gas #leakage? Ans. This is not done by adding rotten cabbage or eggs !! Instead it is done by adding a chemical odourant named Ethyl Mercaptan to the LPG Gas. Ethyl Mercaptan, a sulfur compound is a clear…
Nitrogen gas is used for packing the packets of chips because it is an inert gas, and it prevents the oxidation of oils present in the chips. This keeps the chips fresh and has no or less breakage. Nitrogen is often filled in chips packets to prevent rancidity as it is…
A well-known chemistry experiment is done by placing an egg (raw or boiled) into a container filled with Vinegar. After a few days, something exciting is observed: the egg becomes rubbery and bouncy. The eggshell is formed by calcium carbonate (CaCO3), a salt in limestone, plaster, marble, chalk, corals, shells…
States of matter are generally described on the basis of qualities that can be seen or felt. Matter that feels hard and maintains a fixed shape is called a solid; matter that feels wet and maintains its volume but not its shape is called a liquid. Matter that can change both shape…
Soap molecules consist of a hydrophilic (“water-loving”) end and a hydrophobic (“water-fearing”) end. Water molecules are polar molecules that can dissolve other polar molecules. Fat (and oil) molecules are nonpolar molecules, so they cannot dissolve in water. Milk is a mixture of water, fat, vitamins and minerals. When soap is…
Air is a matter of substance, and hence it contains weight and other assets like density and pressure. Generally, the air surrounding us or objects does not show any pressure because it surrounds with equal pressure. In this science activity, we will observe that air shows its pressure when the…
Air is a mixture of many gases. The molecules of gases present in air have weak inter-molecular forces of attraction. Due to this reason these molecules lie far apart from each other i.e. there are large vacant spaces present between these molecules. So, these molecules are free to move in any direction.…
Non–metal oxides are inorganic chemical compounds formed by oxygen atoms with atoms of nonmetallic elements . Among these chemical elements are Hydrogen, Carbon, Nitrogen, Phosphorus, Sulfur, Halogens. As they are considered to be derivatives of the oxyacids, but with a less water molecule, they are also called anhydrides . Non-Metal Oxides are the covalent oxides of non metals…
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. Sublimation is an endothermic process that occurs at temperatures and pressures below a substance’s triple point in its phase diagram, which corresponds to the lowest pressure at which the…
Elephant toothpaste is a foamy substance caused by the rapid decomposition of hydrogen peroxide using potassium iodide or yeast and warm water as a catalyst. How rapidly the reaction proceeds will depend on the concentration of hydrogen peroxide. Because it requires only a small number of ingredients and makes a…
Sublimation is the transition of a substance directly from the solid to the gas state,without passing through the liquid state. Sublimation is an endothermic process that occurs at temperatures and pressures below a substance’s triple point in its phase diagram, which corresponds to the lowest pressure at which the substance can exist as a liquid. The reverse process of sublimation…
Chemical Reactions are all around us. Whether it is the light from the sun or the cars that we see each day, we are surrounded by these reactions in our everyday life. Chemical Reactions, in the simplest of terms, refer to those reactions in which the bonds are immediately broken…
Conversion of Solid to Gas Sublimation
We are settling into a new rhythm around here. We are generally outside more, the littlest of my wild ones is just coming out of his nap time, and I have been busy with our summer farming plans. All of that is to tell you that this amazingly awesome science…