middle school science activities

Vitamins are organic compounds which are taken along with food in small quantities. They are essential for life as they are responsible for certain metabolic activities in the body. Vitamins are of two kinds: Water Soluble Fat soluble The following are some of the diseases caused by vitam..

Question: What is meant by global warming? Answer: Due to an unhealthy increase in the amount of green house gasses like CO 2 in the atmosphere, there in increase in the temperature of earth. This increase in temperature of earth is known as global warming. It is due to human activ..

Pancreas are present at the end of the duodenum. It secretes pancreatic juice which has an almost neutral pH (6 to 7). Pancreatic juice consists of enzymes like the pancreatic amylase (to act on carbohydrates), trypsin (to act on proteins) and lipase (to act on lipids and fats). This juice is secr..

Nutrition can be defined as the process by which an organism obtains food that is used to provide energy and materials for its life sustaining activities There are basically two modes of nutrition: - Autotrophic - Heterotrophic Autotrophic Nutrition Organisms which synthesize their ow..

Gastric Juice - 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 sec..

The common diseases are syphilis and gonorrhoea. Syphilis is characterized by sores around the anus, vagina, penis, lips, fingers, nipples, etc. In the later stages it results in fever and skin rashes. If untreated, it can result in insanity, heart damage or blindness. Gonorrhoea is characterized ..

Soil can be defined as the uppermost crust of earth mixed with organic material and in which animals and microorganisms live, and plants grow. The word soil is derived from a Latin word solum meaning ground. It is a stratified mixture of inorganic and organic materials, both of which are products o..

Chemically the term alcohol refers to a group of organic compounds, having -OH group in their composition. But the word alcohol used by the common man refers to ethyl alcohol or ethanol. It has a variety of uses, especially as a solvent. But by far the greatest use of alcohol is in the form of alc..

The nervous system carries out the following functions: It perceives the changes around us through our senses It controls and coordinates all the activities of the muscles in response to the changes outside It also maintains the internal environment of the body by coordinating th..

The light coming from an object enters the eye through cornea and pupil. 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 signals. ..