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Introduction to Biodiversity

Grade 7 Science Worksheets

Biodiversity refers to the variety of living organisms in a particular ecosystem or on the planet. This includes different species of plants, animals, fungi, and microorganisms and the diversity of ecosystems, such as forests, deserts, oceans, and grasslands.

Table of Contents:

  • What is Biodiversity
  • Different Types of Biodiversity
  • Importance of Biodiversity
  • Biodiversity and Humans
  • FAQs
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Biodiversity - Grade 7 Science Worksheet PDF

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What is Biodiversity?

Biodiversity is important because it provides essential services to the planet and to all living organisms, such as air and water purification, soil formation and fertility, and pest control. Additionally, biodiversity is important for human health and well-being, as it provides us with food, medicine, and other resources.

Overall, biodiversity is essential for maintaining the balance and stability of the planet’s ecosystems, and it is crucial that we protect and conserve it for future generations.

Just like how a puzzle is more exciting and beautiful with more pieces, the world is more exciting and beautiful with more biodiversity. It’s important because it helps keep the earth healthy and allows different species to live and thrive. Without biodiversity, the world would be a much simpler and less exciting place.

For example, imagine a world with only one kind of tree and no other plants. Not only it would be boring, but it would also be harmful for animals that depend on those trees for food and shelter, and also the ecosystem would be much more vulnerable to disturbances.


Biodiversity is crucial not only for the sake of having different living things around us, but also for the many benefits that they provide, such as pollination, pest control, climate regulation, and recreation. The loss of biodiversity can have serious consequences for human well-being and the planet’s health.


Different Types of Biodiversity

Biodiversity can be broken down into different types:

  • Genetic Diversity: This refers to the variety of genes within a species. For example, within a population of oak trees, there might be trees with genes for tallness, others for disease resistance, and others for drought tolerance. This genetic diversity is important because it allows a species to adapt to changing conditions.
  • Species Diversity: This refers to the variety of different species living in an area. For example, a forest might have many different types of trees, birds, and insects, while a desert might have fewer species but each one is specially adapted to survive in that environment.
  • Ecosystem Diversity: This refers to the variety of different ecosystems, such as forests, deserts, grasslands, and wetlands, and the different species and habitats within them. Each ecosystem has its own unique set of conditions and interactions between species.
  • Regional Diversity: This refers to the variety of different biomes and ecosystems in different regions of the world. For example, the Amazon rainforest has different biodiversity than the Arctic tundra.

It’s important to note that all these types of biodiversity are interconnected and dependent on each other. For example, if a certain species of the plant goes extinct, it can have ripple effects on the animals that depend on it for food and the ecosystem as a whole.

Also, by protecting and preserving biodiversity, we can help ensure many species’ survival and the planet’s health for future generations.


Importance of Biodiversity

Biodiversity is important for many reasons. Here are a few examples:

  • Ecosystem services: Biodiversity helps keep the earth healthy by providing important services, such as pollination, pest control, and climate regulation. For example, bees and butterflies help pollinate plants, which helps grow food for us and other animals.
  • Medicine: Many medicines come from plants and animals. For example, the drug aspirin, which is used to relieve pain, comes from the bark of willow trees. By preserving biodiversity, we can ensure that we have access to these natural medicines in the future.
  • Food: Biodiversity provides us with a variety of foods to eat. For example, different types of fruits, vegetables, nuts, and meats come from different plants and animals. By preserving biodiversity, we can ensure that we have access to a wide variety of nutritious foods in the future.
  • Recreational and aesthetic value: Biodiversity also has recreational and aesthetic value. Many people enjoy hiking, bird watching, and other outdoor activities that allow them to experience and appreciate the beauty of nature.
  • Economic value: Biodiversity also has economic value. For example, many industries, such as agriculture, forestry, and fishing, rely on biodiversity to provide products and services.
  • Future use: Biodiversity also has future use, scientists are still discovering new species and their properties and use, and preserving biodiversity allows us to have the opportunity to discover new things in the future and benefit from them.

It’s important to remember that all the living things in the world are connected. By preserving biodiversity, we can help ensure the survival of many species and the planet’s health for future generations.

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Biodiversity and Humans

Biodiversity refers to all the different kinds of living things in the world, including animals, plants, and other organisms. Humans are also a part of this world, and we depend on biodiversity for many things, such as food, medicine, and clean air and water.


Humans have had a big impact on biodiversity over the years. We’ve cut down forests, built cities, and polluted the air and water. All of these activities have caused many animals and plants to lose their homes and even become extinct. This is called habitat destruction.

But we can also help protect biodiversity by taking action to preserve the habitats of endangered species, reduce pollution, and slow down climate change. For example, we can support conservation efforts, reduce our use of plastic, and use renewable energy sources.

It’s important to remember that all living things in the world are connected, and by preserving biodiversity, we can help ensure the survival of many species and the health of the planet for future generations. We all have a role to play in protecting biodiversity, and by making small changes in our daily lives, we can make a big difference.


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    Biodiversity FAQS

    What do you mean by biodiversity?

    Biodiversity refers to biological diversity. The variety and variability of life on earth.It refers to variabilities among plants, animals, and microorganism species.

    Name the different types of biodiversity.

    The various types of biodiversity are – Genetic Diversity, Species Diversity, Ecological Diversity, and Regional Diversity.

    Differentiate between genetic and species diversity.

    Genetic diversity refers to the diversity of genes within a species, whereas species diversity refers to the enormous variety of species in a given location.

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