How do plants get food ?

Unlike animals, plants produce their own food and except for a few carnivorous plants, do not eat other organisms. Green plants use water, nutrients, and green matter in their leaves called 'chlorophyll to produce their food. Normally water...

What do plants and animals need to grow?

Almost all plants and animals need air, water, light, and nutrition to grow. Green plants use a complicated chemical process, called photosynthesis, to create energy for survival and growth. Since plants create their own energy, they are the...

How are icebergs made?

The icebergs in the North Atlantic are large pieces of ice that have broken off from the glaciers of Greenland. Since frozen water is lighter than liquid water, the broken pieces float as icebergs on the sea. They...

How are waves formed?

Waves are formed as a result of the constant friction between water and wind. If a wind is blowing over the water surface, it carries away particles of water with it. The water starts moving in this way....

Why is the North Sea coast susceptible to storm tides?

A storm tide is a natural phenomenon, and hence cannot be prevented. It happens when the normal water level rises high along the shore due to strong onshore winds and/or reduced atmospheric pressure (page 37) as in the...

How is salt formed in the sea?

When rain on the ground and seeps below it, it washes away substances from the soil and rocks. It carries these substances into the river and the sea. You can read the names of these substances on the...

What does the seabed look like?

The seabed is that area of the Earth which has been researched the least. However, we know, through sound wave technology, that there are deep valleys, high mountain ranges, steep slopes, and flat regions on the seabed. We...

What is the difference between Oceans and seas?

The word 'oceans' implies the large water bodies of the world, namely the Pacific, Atlantic, Indian, and Arctic, as well as the Antarctic oceans where we find icebergs. Smaller seas are separated from the oceans by island chains...

How does a tsunami occur?

The Japanese word 'tsunami' means 'harbour wave It is a series of water waves caused by the displacement ofa large volume of a body of water, usually an ocean, though it can occur in large lakes. Tsunamis are...

How do we save ourselves from earthquakes?

Living in an earthquake-prone zone is often unavoidable. For instance, almost entire Japan lies in an earthquake-prone zone. For this reason, buildings here are primarily made 'earthquake resistant' so that the loss can be minimized. Buildings are built...