increased the leveiS of greennot Ise But of air. gases. Human activities, such as the combustion of fossil fuels, generate You observe hail when the temperatures are below the freezing point. the aerosols. Carbon dioxide is produced during respiration of plants, animals, fungi, and microorganisms. al reaction Physical change

tiny,liquid droplets found in the atmosphere

Which of the following is a greenhouse gas? A. Methane B. Nitrogen C. Ozone D. Sulfur dioxide

4. Carbon Monoxide is the most common air pollutant. a. How is it formed? b. What are its health impacts?

Describe two ways that people can change their habits and choices to reduce their personal greenhouse gas emissions. In each case, be clear about how the change reduces emissions.

Why are multiple heating of the potassium chlorate necessary? Group of answer choices To make sure the reaction is complete when the mass reaches the required value. To make sure the reaction is complete when the mass does not change significantly. To avoid the potassium chlorate reacting with the atmosphere. To avoid an explosive reaction due to rapid heating.

these are 2 separate questions

20. Dissolving the salt potassium nitrate in water is an endothermic reaction. What would be observed if potassium nitrate was dissolved in water? a) The water would get very hot. b) The water would get colder. c) The salt would float to the top of the water. d) Bubbles of hydrogen gas would be produced.

Polychlorinated biphenyl (PCBs) are environmental contaminants composed of carbon, hydrogen, and chlorine atoms. A news report states that a new method of disposal of PCBs converts them completely to carbon dioxide and water. The necessary oxygen atoms come from the oxygen in the air. Do you think that this method will work? Please explain.

Describe how the use of fossil fuels ties to global warming.  Give three specific examples of cause and effect.