APES H Vocabulary

Health

A state of physical and emotional well-being; the absence of disease and aliment

Hazardous Waste

Any discarded material containing substances known to be toxic, carcinogenic

High Quality Energy

Concentrated energy is useful for carrying out work

Heavy Metal Pollution

Metals such as mercury, lead, cadmium, and nickel that are highly toxic

Hydrologic Cycle

Movement of water from the ocean into the troposphere to the lithosphere to the ocean

Humus

Organic component of soil

Human Pollution

Over seven billion and growing by ninety million a year

Herbicides

Poisons that specifically kill plants

Hydroelectric Power

Small and large scale systems utilizing falling water to spin turbines and generate electricity

Hydroponics

System of growing plants whose roots are in water not soil

Hydrogen

The most abundant element in the universe; explosive gas, colorless and odorless

Habitat

The place or set of environmental conditions in which a particular organism lives

Half-Life

The time required for one-half of a sample to decay or charge into some other element