7th Eng Science

We have already learnt about galaxies and stars as well as the solar system and its different components. Stars are born out of nebulae. Nebulae are clouds made up mainly […]

Magnets are made from alloys of iron, cobalt and nickel. Nipermag, an alloy of iron, nickel, aluminium and titanium is used to make magnets. We have also learnt that alnico […]

It is seen from the above examples that sound is generated due to a variety of events. In some examples, sound was generated due to the vibration of an object, […]

You have learnt that light is composed of several colours. You must have also seen the dust particles in a beam of sunlight entering the house through a small window. […]

We get many substances from nature. They satisfy a variety of our daily needs. Soil, stones, minerals, air, water, plants and animals on the earth are all various kinds of […]

We have learnt that, a new substance produced by the chemical processing of natural substances is called a man-made substance. In this lesson, we will learn about some substances of […]

How many different states of matter are there ? Name them. What brings about a change of state of matter ? What are the properties of matter ? Do all […]

We have previously studied some examples of changes. Changes like the ripening of a fruit, spoiling of milk occur naturally. These are called natural changes. Can you think of other […]

Muscular system Close your fist tightly and bend your arm at the elbow. Now feel the upper part of this arm with the fingers of your other hand. What did […]

Cell  We have learnt that cellular organization is the primary characteristic of all living organisms and that the cell is the fundamental structural and functional unit of living organisms. We […]