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Y8 Ecolog Relation
Key words
Term | Definition |
---|---|
producers | Organisms that produce their own food by photosynthesis |
consumers | Organisms that eat producers or other consumers |
herbivores | Organisms that only eat producers |
predator | Organisms that hunt and kill prey |
organisms | A living thing |
species | Organisms that can reproduce to produce fertile offspring among themselves |
ecology | The study of the environment |
population | The total number within one species |
adaptations | Design features that allow for survival in a particular environment |
hypothesise | To use scientific theory to predict an outcome |
decomposers | Organisms that break down dead organisms |
secreting | To release chemicals |
enzymes | A biological catalyst – makes a reaction occur faster but is not used in the reaction |
absorbed | Taken into an organism |
cytoplasm | Liquid part of a cell where reactions occur |
nutrient cycle | How nutrients are reused in an environment |
monocotyledons | Plants whose seeds contain one seed leaf |
dicotyledons | Plants whose seeds contain two seed leaves |
taxonomy | The classification into groups |
germinate | When a seed sprouts |
inferred | Using specific evidence to make general rules (induction – reverse is deduction) |
phloem | Vessels carrying nutrients (glucose) |
xylem | Vessels carrying water and minerals |
epidermis | Outer layer of cells in the leaf |
stomata | Pores that allow gas exchange in the leaf |
succulents | Liquid storing |
carbohydrate | Energy molecule containing CHO |
photosynthesis | Carbon dioxide + water + light energy glucose + oxygen |
ecosystem | A collection of habitats |
trophic level | Each stage in a food chain |
pyramid of numbers | A graph of the numbers of organisms in each trophic level |
pyramid of energy | A graph of the energy contained in the organisms in each trophic level |
insecticides | Chemicals that kill insects |
toxic | Poisonous |
concentrated | A large number of particles per volume |
community | All the populations of organisms in an ecosystem |
biome | A collection of ecosystems |
biosphere | All the Earth’s biomes together |
hierarchy | Order from highest to lowest |
population dynamics | How population numbers change |
simulate | Use a computer program to predict |
population density | The number of organisms per area |