88thth Grade Science Grade Science

Unit 7:Unit 7:

Changes in the EarthChanges in the Earth

Lesson 1:Lesson 1:

Road to Survival vs. Road to Road to Survival vs. Road to ExtinctionExtinction

Vocabulary of instructionVocabulary of instruction

1. Endangered Species1. Endangered Species Species of plants or animals that are in danger of Species of plants or animals that are in danger of

extinction or at risk of dying out due to changes in extinction or at risk of dying out due to changes in environmental conditions or excessive predation.environmental conditions or excessive predation.

Examples of Endangered Examples of Endangered AnimalsAnimals

Examples of Endangered Examples of Endangered PlantsPlants

2. Equilibrium2. Equilibrium Balance, state in which all forces or reactions act in perfect Balance, state in which all forces or reactions act in perfect

opposition and cancel the effects of one another. opposition and cancel the effects of one another. Living and non-living environment interact with each other Living and non-living environment interact with each other

to form a stable system. A to form a stable system. A naturalnatural self-sufficient unit of the self-sufficient unit of the world comprising a biotic community (living organisms) and world comprising a biotic community (living organisms) and its abiotic physical-chemical factors. its abiotic physical-chemical factors.

3. Extinction3. Extinction A kind of organism that is no longer alive on A kind of organism that is no longer alive on

Earth. It does not have any living examples.Earth. It does not have any living examples.

4. Habitat Destruction4. Habitat Destruction Is a process of change in land use in which one Is a process of change in land use in which one

habitat type is removed and replaced with another habitat type is removed and replaced with another type of habitat. In this process of change in land use, type of habitat. In this process of change in land use, plants and animals which previously used the site are plants and animals which previously used the site are displaced or destroyed, reducing biodiversity.displaced or destroyed, reducing biodiversity.

Examples of Habitat Examples of Habitat DestructionDestruction

Examples of Habitat Examples of Habitat DestructionDestruction

5. Threatened Species5. Threatened Species Any species (including animals, plants, fungi, insects, etc.) which Any species (including animals, plants, fungi, insects, etc.) which

are vulnerable to extinction in the near future.are vulnerable to extinction in the near future.