Composting Crossword Puzzle

QUESTIONS LIST:

• environment: the natural world of land, water, air, plants, and animals
• biodegradable: material that is able to be readily decomposed or broken down by biological means, especially bacterial action
• compost: organic matter that has been decomposed by microorganisms
• decompose: to break down, change form
• humus: the stable organic complex that remains after plant and animal residues have decomposed in soil or compost
• landfill: a method of solid waste disposal in which refuse is buried between layers of dirt to fill in or reclaim low-lying ground
• nitrogen: an element most living things consume as food; found in the air we breathe and in all living tissue
• nutrients: materials a body gets from food to use for energy, growth, and repair; present in compost-rich soil
• organic: related to food production without chemical fertilizer
• soil: top layer of earth's surface
• ph: the degree of acidity or alkalinity of a substance
• vermi compost: composting using worms
• aerobic: in the presence of oxygen
• anaerobic: in the absence of oxygen
• bacteria: single-celled microscopic organism