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ecology
| Question | Answer |
|---|---|
| Ecology | the study of interactions between organisms and their environment. |
| Biotic factors | living things in the environment. |
| Abiotic factors | nonliving things in the environment |
| oganism | a single living thing |
| Population | all of the members of one species living together. |
| Community | all the different populations in a specific area(only the LIVING things) |
| Ecosystem | All of the biotic (living) and abiotic (nonliving) things that interact in an environment. |
| Biome | a group of ecosystems with similar climates ,plants and animals. |
| Biosphere | the part of earth where living things survive.(land, water, air) |
| Why is soil important? | because everything that ?lives on land depends directly or ?indirectly on soil. |
| Soil quality(how good it is) is based on these properties | soil profile,composition,texture, and particle size |
| Soil | mixture of rock particles, minerals, decayed organic material(plants,animals), air, and water. |
| Humus | The decayed organic matter in soil |
| Where does the sand, silt, and clay portion of soil come from ? | weathered bedrock |
| bedrock | the solid rock layer beneath the soil. |
| Soil texture | depends on the size of individual soil particles and is determined by how much of each particle makes up the soil. |
| What is the largest soil particle? | sand |
| What is the smallest soil particle? | clay |
| Soil particles from largest to smallest | sand,silt,clay |
| soil pH | ranges from 4-10 |
| best pH for plant growth | between 5 and 7 |
| Lime | a kind of fertilizer that alters(changes) pH |
| Soil Profile | the layers that make up soil |
| horizon | a soil layer |
| A" Horizon | topsoil, |
| "B" Horizon | subsoil |
| "C" Horizon | parent material above the bedrock. |
| Topsoil | nutrient rich,containing a mixture of humus, clay, and minerals. |
| Which horizon most suitable for plant growth? | A horizon or topsoil |
| Where do most animals live? | A horizon or topsoil |
| Decomposers | organisms such as fungi and bacteria that break down dead plants and animals. |
| birth rate | the number of births in a population during a certain amount of ?time. |
| What is the main way organisms are added to populations? | births |
| What is the main way populations decrease? | deaths |
| death rate | the number of deaths in a population during a certain amount of time |
| Immigration | when organisms move in from another environment. |
| Emigration | when part of the population leaves or exits the ?environment |
| population density | the number of organisms in a given amount of space for a particular area. |
| limiting factors | biotic or abiotic factors that limit the number of individuals. |
| Examples of limiting factors | weather, space,food and water |
| carrying capacity | the maximum number of organisms that can survive in a particular ecosystem. |
Created by:
science7th
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