middle school science activities

Introduction - For a layman the term 'work' implies any activity resulting in muscular or mental exertion. In physics, however, the term has a different meaning. It represents a physical quanti..

The inexhaustible natural resources are unlimited in nature, and they are not likely to be exhausted by human activities. Example are solar radiation, air, water, precipitation (rainfall, snow fall, etc.,) and atomic powe..

Metals that are low in the activity series are very un-reactive. The oxides of these metals can be reduced to metals by heating alon..

The part of the cell between the cell membrane and the nuclear membrane is called the cytoplasm. The cytoplasm consists of the matrix and the organelles. The matrix is a transparent semi fluid substance. When active, it is always in a state of movement. The organelles are found embedded ..

The eye lens converges these light rays to form a real, inverted and diminished image on the retina. The light sensitive cells of the retina gets activated with the incidence of light and generate electric signal..

With booming population, there is also booming construction activity going on in the urban areas. They also generate garbage like metal rods, bricks, cement, concrete, roofing materials, etc. This type of wastes is also generated by the digging activites of the various departments like t..

It is secreted by the secretory glands of the stomach wall. It is highly acidic as it contains hydrochloric acid (HCl). It also contains enzymes like pepsin and renin. Both act on proteins. However, renin is present only in young children. It digests the milk proteins. Pepsin is secreted in its in..

Question: What is nutrition? Answer: Nutrition is the process by which an organism obtains food which is used to provide energy and materials for its life sustaining activities..

Question 1 - Question: How are wastes formed in the body? Answer: Wastes are formed in the body as by-products of the metabolic activities in the bod..

Carbon Dioxide - During photosynthesis, carbon dioxide is converted into carbohydrates and this is called fixing of carbon dioxide. Many processes like respiration, combustion, volcanic activity, etc. release carbon dioxide into the atmosphere. This carbon dioxide of the atmosphere is use..