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____________________________ feed on other organisms.
consumers
________________________________ absorb the energy of the sun.
producers
All the _________________________________ in a community that are linked to one another make up a food web.
food chains
Consumers that eat both plants and animals are _______________________________.
omnivores
The process by which a community changes over time is called __________________________.
succession
Anything added to the environment that is harmful to living things is _____________________.
pollution
A community that changes very little over time is called a(n) ____________________________.
climax community
The study of how living things interact with one another and with nonliving things in their environment is ________________________________.
ecology
All the biomes on Earth together form the _________________________________________.
biosphere
Deserts, grasslands, and the ocean are all examples of _________________________________.
biomes
All the deer of the same species living in a forest make up a (n) __________________________.
population
The place where an organism lives is its _____________________________.
habitat
Certain bacteria change nitrogen gas from the air into ammonia by the process of ______________________________________.
nitrogen fixation
_________________________ consist of all the interactions among populations and the nonliving things in their environment.
ecosystems
Water, air, and sunlight are examples of ______________________________________.
renewable resources
Plants store _________________________________ energy in their tissues.
chemical
Photosynthesis and cellular respiration help to cycle ____________________________through ecosystems.
carbon, oxygen, and water
During cellular respiration, organisms produce ___________.
carbon dioxide
When water in a pond _______, it changes into water vapor.
evaporates
The less energy available to a population, the ______ the population will be.
smaller
What is a food web?
all linked food chains in a community
How do organisms return carbon to the atmosphere?
They give off carbon dioxide gas during respiration or when they decompose
What is ecology?
Study of interactions among living things and nonliving parts of the environment
What happens in the water cycle?
Rain fills lakes, rivers, oceans
water evaporates into atmosphere
water vapor cools; clouds form
Why are there large populations of organisms low on the pyramid of numbers?
They have more energy available to them than organisms higher up the food chain