Science 1 Marks Question

Yes, forests bind soil with root and prevent soil erosion. They also maintain fertility of soil and check So, it can be said that conserving forest results in conservation of soil.

Forest is a large area covered with variety of flora and inhabiting various organisms.

Leaves are helpful in purifying air.

Following are the benefits of residing in nearby forest area:

• Pleasant weather.
• Less noise pollution.
• Good rainfall.

Trees absorb the noise of the vehicles on roads and reduce noise pollution. Therefore, trees are planted alongside the roads.

A typical food chain in a pond is: Algae → Small fishes → Large fishes.

Photosynthesis.

Forests help in bringing good rainfall in neighbouring areas. Forest also act as natural absorber of rain water and allows it to seep, it help in maintaining the water table throughout the year.

No, due to different climatic conditions, there are variations in the types of trees and other plants. From forest to forest.

False.

Scavengers eat the dead animals and act as the cleaning agents of our environment. Some of these animals (scavengers) are vultures, crows, jackals, hyena, some insects, etc.

Spiders, squirrels, ants etc.

Decomposers.

The part of the tree with branches is known as the crown. When the crown of tall trees in the forests forms a roof-like covering over the others plants, it is known as a canopy.

1. Crow, vulture.
2. Grass → Deer → Tiger.

Tiny insects and ants feed on the fallen leaves and convert them into dark-coloured humus which makes the soil fertile.

The branchy part of a tree above the stem is known as the crown.

Suspended Particulate Matter.

True.

Forest absorbs rainwater and allows it to seep naturally; its leaves and branches prevent rain to hit the ground directly.

When an animal or a plant is found in a specific area, it is known as an endemic species.

The decaying leaves and animal droppings in a forest enrich the soil.

Decomposers convert dead leaves and dead animals into humus.

The dead animals become food for vultures, crows, jackal and insects and in this way nutrients are cycled, thus we say nothing goes waste in forest.

Herbs form the lowest layer in the forest.

The root system helps water to seep down in the ground. It helps to maintain the water table throughout the year. Roots of trees normally bind the soil together and stop the erosion of soil.

The forests provide us oxygen to breathe. If we rapidly cutting down forests means we are cutting down the oxygen supply to us. That is why they are called green lungs.

The insects, butterflies, honeybees and birds help flowering plants in pollination.

Herbs form the lowest layer in the forest.

Boars, bisons, jackals, porcupines, elephants, etc. live in the deeper areas of the forest.

The branchy part of the tree above the stem is known as crown of the tree.

There are several organisms and micro-organisms that live in the soil convert waste into useful nutrients called humus. This is why there is no waste in forest.

The micro-organisms which convert the dead plants and animals to humus are known as decomposers like Fungi and bacteria. They convert dead leaves and dead animals into humus.

The forest floor seemed dark coloured as it is covered with a layer of dead and decaying matters like leaves, fruits, seeds, twigs and small herbs.

The variation in the type of plants and animals is found in different forests because of the climatic conditions of that particular area.

Wax and paper.

The uppermost branches and leaves of tall trees act like a roof over forest ground, this is called a canopy.

In a forest, big trees, shrubs and other plants are found. They trap solar radiation for photosynthesis.
So, the sunlight does not reach at the forest floor, thus making it dark.

Since, all food chains are interlinked disturbance in one food chain will affect the other food chain in a forest.

Grass → Insects → Frog → Snake → Eagle.

Without tree roots holding the soil in a forest, soil will run into the river and will cause water pollution.

Forest.

Tall trees look like a roof over the other plants in the forest, this is called canopy.

A forest is a purifier of air and water.

True.

Construction of roads and buildings, industrial development, increasing demand of wood etc.

Tall trees which look like roof over other plants in the forest is called canopy.