Name three sources that can increase the amounts of the following substances in the atmosphere: carbon dioxide, sulfur dioxide, nitrogen oxides. In what form is nitrogen available... Name three sources that can increase the amounts of the following substances in the atmosphere: carbon dioxide, sulfur dioxide, nitrogen oxides. In what form is nitrogen available for plant use? List three ways that nitrogen is made available for plant use. Describe the difference between an acidic solution and a basic solution. How does acid rain form? What biological indicators in a freshwater sample indicate a healthy environment? Explain a possible reason for the recent rise in atmospheric carbon dioxide. Why do governments monitor emissions of sulfur dioxide and nitrogen oxides? Fish are not usually found in water that has a pH below a certain level. What is this pH level? Define the term 'heavy metal' and give an example. What is the difference between an organic chemical and an inorganic chemical? Explain why the following tests are used to determine water quality: a) pH b) dissolved oxygen c) phosphorus. Write a paragraph about cleaning up pollutants in the environment using the following terms: biodegradation, phytoremediation, accumulation. What precautions should you take when handling a corrosive material like bleach? Suggest safe ways to store a corrosive substance. Read more

1. Burning fossil fuels, industry, agriculture increase CO₂, SO₂, NOₓ. 2. Nitrogen in ammonium, nitrate forms for plants. 3. Nitrogen fixed by microorganisms, nitrification, lightning.

1. Three sources that increase carbon dioxide, sulfur dioxide, and nitrogen oxides in the atmosphere are the burning of fossil fuels, industrial activities, and agricultural practices.

2. Nitrogen is available for plant use primarily in the forms of ammonium (NH₄⁺) and nitrate (NO₃⁻) ions.

3. Nitrogen is made available for plant use through nitrogen-fixing microorganisms, the process of nitrification transforming ammonium to nitrate, and through natural processes like lightning which convert atmospheric nitrogen to forms usable by plants.

4. An acidic solution has a pH less than 7, containing more hydrogen ions, while a basic solution has a pH greater than 7, containing more hydroxide ions.

5. Acid rain forms when sulfur dioxide and nitrogen oxides react with water vapor and other chemicals in the air.

6. Biological indicators of a healthy freshwater environment include the presence of diverse species like mayfly larvae, stonefly larvae, and caddisfly larvae.

7. A possible reason for the rise in atmospheric carbon dioxide is the increase in the burning of fossil fuels for energy production.

8. Governments monitor sulfur dioxide and nitrogen oxides emissions because they contribute to air pollution, acid rain, and respiratory problems.

9. Fish are usually not found in water with a pH below 5.

10. Heavy metals are dense metals that can be toxic or poisonous at low concentrations, like lead.

11. An organic chemical contains carbon-hydrogen bonds, whereas an inorganic chemical does not.

12. Water quality tests like pH, dissolved oxygen, and phosphorus are used to determine the water’s acidity/basicity, oxygen availability for aquatic life, and nutrient levels that can affect algae growth and ecosystem health.

13. Cleaning up pollutants using biodegradation involves microorganisms breaking down contaminants; phytoremediation uses plants to absorb and break down pollutants; accumulation involves the build-up of contaminants in organisms over time.

14. When handling corrosive materials like bleach, wear protective gear, use in a well-ventilated area, and store securely in clearly labeled containers away from other chemicals.