A Kaleidoscope is an optical instrument with two or more reflecting surfaces. These reflecting surfaces are tilted at an angle, so that one or... View Article
Bones at the elbow are joined by a hinge joint. In hinge joints, the articulating ends of the bones fit together like a hinge on a door and... View Article
Fire is a chemical reaction that creates light and heat from oxygen and fuel. A lit candle needs to draw oxygen from the air in order to continue... View Article
Migration refers to the movement of an organism or a group of organisms from its natural habitat to another place at a particular time every... View Article
True It floats because it weighs less than the amount of water it would have to push out of the glass if it sank. Wood, cork, and ice are all... View Article
The major excretory product in humans is urea. The major wastes produced by us are:- Carbon dioxide and Urea . Carbon dioxide is produced... View Article
The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion. Ingestion is the process the food is... View Article
False. Sugar dissolves in water because energy is given off when the slightly polar sucrose molecules form inter molecular bonds with the polar... View Article
A lump of cotton wool has a lot of air trapped inside the space present in its fibers. When this lump of cotton is immersed in water, all the air... View Article
Deer eats only plant products and so is called herbivore. An herbivore is an organism that mostly feeds on plants. Herbivores range in size... View Article
Stomata are tiny pores or opening on the surface of a leaf. Stomata play an important role in gaseous exchange and photosynthesis. They control... View Article
Soil, water, and air are abiotic factors of a habitat. Biotic factors include all the living components present in an ecosystem Abiotic factors... View Article
When current is switched on in a room heater, it produces a heat due to the heating effect of current passing through the conductor. The... View Article
The concave lenses will always form virtual, erect and diminished images. A concave lens is a lens that possesses at least one surface that... View Article
True Cockroaches do not have bones inside their bodies, instead they have a skeleton made of plates on the outside of its body. The cockroach... View Article
Air dissolved in water contains approximately 36 percent oxygen compared to 21 percent in air. The remaining amount can be considered as... View Article
The combination of two or more cells is called a battery. All batteries are made up of three basic components: an anode (the '-' side), a... View Article
False Joints are formed wherever two or more of these bones meet. Each of the fingers has three joints: metacarpophalangeal joint (MCP)... View Article
Deficiency of vitamin C causes a disease known as Scurvy There are 13 vitamins, including vitamins A, B complex, C, D, E, and K. A condition... View Article
