Forests: Our Lifeline Online Quiz

Ecosystems contain complex food webs, not just a single food chain. Multiple organisms interact and consume various other organisms, creating a web of energy transfer.

Animal waste, or droppings, contains nutrients like nitrogen and phosphorus that break down and enrich the soil, acting as a natural fertilizer.

It is the roots of trees and plants that bind the soil together, preventing erosion. The stem is the main structural axis of the plant above ground.

Forests support a vast array of plant and animal species, making them essential hubs for global biodiversity.

Mass scale planting of trees is called afforestation or reforestation, whereas deforestation is the clearing or removal of forests.

Animal excreta primarily affects soil and water quality through nutrient cycling and potential contamination, but it is not a primary source of air pollution.

Forests act as natural filters by absorbing carbon dioxide and releasing oxygen, while also helping to filter and purify water through soil absorption.

Food chains begin with producers, which are organisms that can make their own food through photosynthesis, specifically green plants.

Producers are organisms that produce their own food using sunlight, water, and carbon dioxide; green plants are the primary example.

Decomposers break down dead organic matter into simpler substances; fungi and bacteria are the most common examples.

Insects and birds facilitate the transfer of pollen between flowers, which is the process of pollination necessary for plant reproduction.

In the vertical structure of a forest, herbs and grasses occupy the lowest level, known as the forest floor or bottom layer.

Gum, plywood, and sealing wax are all derived from trees or forest resources, whereas kerosene is a fossil fuel extracted from the earth.

Decaying organic matter decomposes to form humus, which adds essential nutrients to the soil, making it fertile.

Deforestation removes the protective cover of trees, leading to soil erosion, increased flood risks due to lack of water absorption, and air pollution due to reduced carbon sequestration.

Forests are often called the green lungs of the Earth because they exchange gases, absorbing carbon dioxide and releasing oxygen.

Trees play a crucial role in the water cycle through transpiration; removing them reduces the amount of moisture released into the atmosphere, leading to less rainfall.

The canopy is the upper layer of the forest formed by the mature tree crowns, which acts as the topmost layer of the forest ecosystem.

Humus is the dark, organic material in soil produced by the decomposition of vegetable or animal matter by microorganisms.