Which among the following is a realm of the Earth where all forms of life interact with each other?

• Biosphere

• Hydrosphere

• Lithosphere

• Atmosphere

Three major fossil fuels are coal, oil, and

• wood
• natural gas
• uranium
• electricity

The greatest danger facing by the most endangered species is

• hunting

• capture for pet trade

• disease

• habitat loss

A ______ is a place where plants and animals can meet their needs.

• community

• habitat

• population

• environment

If there were no plants we would not have?

• school
• computers
• oxygen
• water

Smog is what kinds of pollution?

• recycle
• water pollution
• land pollution
• air pollution

Ecosystem is define as

• Physical surroundings on Earth are called the

• the study of the relationships between living things and their surroundings, or environment.

• large community of living organisms in a particular area. The living and physical components are linked together through nutrient cycles and energy flows.

• The parts of the land, sea, and atmosphere in which organisms are able to live

A non-living part of an organism's habitat.

• abiotic factor
• biotic factor
• habitat
• acid rain

Precipitation that is more acidic than normal because of air pollution.

• condensation
• acid rain
• nutrients
• biome

The study of how living things interact with each other and their environment.

• biology
• sociology
• psychology
• ecology