AEST STD 4 High Grades Earned.

photosynthesis Which process uses chlorophyll to change carbon dioxide and water to sugar? habitat The area or type of environment in which an organism or biological population lives is the: 21% What percentage of the air is oxygen? sulfur The pale yellow element occurring widely in nature is: radon Which of the following is a colorless, radioactive gas formed by the disintegration of radium? air conditioners/refrigerators Chlorofluorocarbons are used in? photosynthesis Plants give off oxygen through the process known as: USDA Careers in air quality are available with which service? watch for airborne disease organisms Plant pathologists need an awareness of air quality because they must: nitrogen What is the most abundant element in air? natural selection Insects and other organisms have adapted to the pollution in the air through a process known as: considered controversial environmental topics The greenhouse effect and global warming are: tetraethyl lead Which of the following is a poisonous product still used in third world countries? particulates The small particles that become suspended in air are known as: plant residue The material that remains after a plant dies or is harvested is called: water The bodies of young plants and animals consist of about 90 percent of which of the following? this will dissolve or change most other materials A universal solvent serves to: potable Which term describes drinking water that is free of harmful chemicals? porous Soil is _____when water fills all spaces or pores. movement of water from the oceans to land and back to oceans The water cycle is a natural process by which water moves in a circular motion from: capillary Plants use only what kind of water in soil?