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Environmental Issues

Grade 6 Science Worksheets

Nature in Danger!

Environmental Pollution! Climate Change! Loss of Biodiversity! Threatened Species! Global Warming!

Our news is often filled with such alarming topics. The spread of human civilization and rapid industrialization have increasingly been having an impact on our environment. Put your knowledge to the test with this challenging 6th Grade Science Worksheet! Read each question carefully and choose the response that you feel is correct.

Humans over the years have been blamed for the deterioration of our environment in many ways –

  1. Over-hunting and over-fishing, leading to the extinction of many species and threatening many more species
  2. Over-population, which makes survival difficult for other species
  3. Excessive burning of fossil fuels, leading to poor air and water quality, collectively termed as environmental pollution
  4. Needing more and more land for farming and industry, leading to deforestation and soil erosion
  5. Impact on global temperatures, climate, and weather, causing conditions known as global warming, climate change, acid rain, ozone layer depletion, and many more

Let us understand the human impact on the physical environment in more detail.

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Environmental Pollution

Environmental Pollution refers to all the ways in which people pollute their surroundings.

This takes many forms –

  1. Air pollution – gases, smoke, ash, are released into the atmosphere as a result of industrial and domestic combustion.
  2. Water pollution –harmful chemicals, fertilizers, pesticides, other waste products, are dumped by factories and homes into our lakes, rivers, and oceans.
  3. Soil pollution –chemicals, fertilizers, pesticides also harm useful bacteria and other organisms in the soil, preventing adequate decomposition of plants and animals.
  4. Deforestation –clearing forests, grasslands, cutting down trees, for making cities, factories, and other construction purposes.
  5. Solid waste –garbage and litter such as plastics, junked automobiles, tires, household goods, and electronic waste find their way into landfills and take hundreds, even thousands of years to decompose.
  6. Noise Pollution in urban areas affects human and animal life.
  7. Radiation Pollution found in waste from nuclear power plants and from certain electronic devices.

Climate Change

Recently, scientists have discovered a new phenomenon caused by Global Warming whereby weather conditions, such as temperature and rainfall, are impacted in a region over long periods of time. They have discovered that the earth’s surface has warmed considerably over the past century, and the warmest years have been in the last couple of decades. As a result, glaciers are melting at a faster rate, average sea levels are rising, and ocean temperatures are rising. This can have unpredictable and disastrous effects on life, weather, and climate around the world. Doubts? A 6th-grade science tutor can help.

eTutorWorld Understands Math Tutoring | Online Math Worksheets are Important Tools

Understanding graphs, charts, and opinion polls in a newspaper, for calculating house and car payments, and for choosing a long-distance telephone service are impossible without strong math skills …and the only way to develop strong math skills is by constant practice.

‘Practice makes a man perfect’ holds true for no other field better than for math. A middle or high school student must set aside a minimum of an hour for math every day. Other than textbooks, worksheets help you revise and understand concepts better.

Our expert tutors prepare online maths worksheets that are age and grade-appropriate. Grade-wise math worksheets for Elementary Math, Arithmetic, Pre-Algebra, Algebra, Geometry, Trigonometry, Statistics, Pre-Calculus and Calculus can be solved to improve math skills, to get ahead or to even catch up.

You may download these FREE online math worksheets in the PDF format, and then print and email us their solutions for a free evaluation and analysis by eTutorworld’smath expert tutors.

You may solve these worksheets by yourself or with your peers while studying together.

The Answer Key at the end of each worksheet allows for a self-evaluation.

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Greenhouse Effect

Greenhouse gases are an important contributor to Global Warming. The Greenhouse Effect is a phenomenon in which certain gases in our atmosphere absorb heat from the sun’s infrared radiation and remain trapped in the atmosphere, thereby increasing the overall temperature on earth. Water vapor, carbon dioxide, methane, ozone, nitrous oxide and Chlorofluorocarbons (CFCs) are the primary greenhouse gases. Many of these gaseous emissions, such as CFCs, are man-made. These gases deplete the ozone layer in the stratosphere and allow more harmful radiation from the sun to enter the earth’s atmosphere. The Environmental Science Worksheet will assess your own understanding of the concepts of environment and ecosystem.

Habitat Loss

Many human activities such as agriculture, mining, harvesting, construction, urban growth, result in Habitat Loss whereby several species of plants and animals are displaced from or destroyed in their natural surroundings. This reduces biodiversity and abundance of species and affects the health global ecosystems. The tiger, cheetah, mountain gorilla, Asian elephant and Javan rhinoceros are all in threat of extinction because of these human activities.

Over-hunting and Over-fishinghave caused serious reduction in species population, sometimes to the point of extinction. Over-hunting in the past has led to the extinction of elephant birds, giant lemurs, giant kangaroos and moas. Over-fishing is resulting in depleted species of sharks, monkfish, Atlantic halibut and bluefin tuna.

All this detrimental impact on life and environment has led to greater awareness and increased focus on Conservation of environment resources.

Check Point

  1. Poor air, water, soil quality is often the result of ________.
  2. Global warming affects weather conditions such as ______ and ______ in a region over long periods of time.
  3. Harmful gases trapped in the earth’s atmosphere are referred to as _______ effect.
  4. Plants and animals displaced from or destroyed in their natural surroundings is termed as ________.
  5. Which of these are greenhouse gases?
    1. Methane
    2. Nitrogen
    3. Ozone
    4. Oxygen

Answer Key

  1. Environmental pollution
  2. Temperature, Rainfall
  3. Greenhouse
  4. Habitat loss
  5. a) Methane and c) Ozone

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