Topic 1 - The environment is made up of chemicals that can support or harm living things

Process of changing free nitrogen that the nitrogen atoms can combine with other elements to shape compounds that organisms can utilize.

• Bacteria in the soil • Bacteria on nodes found at the ends of plant roots • Lightning

• Used by living things • Lost in drainage water • Broken down by other bacteria in the soil

Any change in the environment that produces a condition that is harmful to living things.

Nitrogen, Phosphorus, Potassium

Herbicides, Insecticides, Fungicides

They kill weeds

They kill insects

They kill fungus

Liquid that dissolves and carries substances as it passes through the soil.

Sites specially formed to prevent waste chemicals from moving into the soil.

Wastewater including dissolved and undissolved materials from your kitchen, bathroom and laundry

A big container which is underground and full of bacteria which breaks down waste and nutrients moved into the soil.

They put chemicals into this water to clean it.

Wastewater which is released from a factory or sewage treatment plant.

It includes carbon.

It does not include carbon.

The power of hydrogen.

where an acid reacts with a base.

pH less than 7.

pH greater than 7.

Utilized to measure how acidic a substance is.

A special paper that turns red in acid and blue in base.

A special paper that changes to a range of different colors depending on how acidic or basic a susbtance is.