Question

sources of outdoor chemical hazards

• in the air: ____________, such as volcanic eruptions, or human sources, such as pesticides
• in the ground: pesticide use,

______________________________

• in the water: ____________________ from land or direct drainage of toxic substances into water.

image: a leaking oil line.

bioaccumulation and biomagnification

• bioaccumulation: the ______________________________.
• biomagnification: the ____________________________ with __________________.
• persistent...

Explanation:

For "In the air", natural sources like volcanic eruptions release chemicals (e.g., sulfur compounds), so the blank can be "natural sources". For "In the ground", besides pesticides, industrial waste or mining activities can contaminate, but a common one is "industrial waste disposal" or "mining operations", but more simply, maybe "heavy metal contamination" (from industrial waste) or "oil spills" (but the image has a leaking oil line, maybe for ground, "oil leaks" or "industrial waste"). For "In the water", runoff from land (carrying pesticides, fertilizers, industrial waste) or direct drainage, so "runoff" fits. For Bioaccumulation: it's the accumulation of a substance in an organism over time (e.g., toxins in fish). Biomagnification: increase in concentration of a substance in organisms at higher trophic levels (e.g., DDT in eagles from eating contaminated fish).

Answer:

• In the air: natural sources
• In the ground: industrial waste (or oil leaks, based on the image)
• In the water: runoff
• Bioaccumulation: accumulation of a substance in an organism over time
• Biomagnification: increase in concentration of a substance in organisms at higher trophic levels

(Note: The answers are based on environmental science concepts related to chemical hazards and bioaccumulation/biomagnification. The blanks are filled with standard terms from environmental science, a subfield of Natural Science.)