1. The thin envelope of life that surrounds the earth's surface is called the:A) atmosphereB) biosphereC) lithosphereD) hydrosphereE) ecosystem

2. A collection of organisms together with their physical and chemical factors are calleda/an:A) atmosphereB) biosphereC) lithosphereD) hydrosphereE) ecosystem

3. The terrestrial realm of the biosphere is distributed into particular climatic regionscalled:A) nichesB) habitatsC) populationsD) communitiesE) biomes

4. A group of organisms of the same species within a community is called a/an:A) nicheB) habitatC) populationD) communityE) biome

5. The overall role that a species serves in a community is its:A) nicheB) habitatC) populationD) community E) biome

6. The physical location in the environment to which an organism has adapted is its:A) nicheB) habitatC) populationD) communityE) biome

7. Which trophic level forms the base of a food chain?A) primary consumersB) quarternary consumersC) secondary consumersD) primary producersE) tertiary consumers

8. Which is mismatched?
A) parasitism - one organism benefits and the other receives no benefitB) competition - one organism gives off substances that inhibit or kill otherorganismsC) predator - seeks out and ingests live preyD) scavengers - feed on live to dead cells and wastesE) omnivores - feed on plants and flesh

9. Carbon dioxide (CO2) is:
A) removed from the atmosphere during photosynthesisB) a source of carbonC) returned to the atmosphere during respiration and fermentationD) used by marine organisms to make limestone for their hard shellsE) all of the choices are correct

10. The energy of photons is converted into chemical energy during:A) ammonificationB) nitrogen fixationC) photosynthesisD) nitrificationE) denitrification.