1. 4 th Six Weeks Review for Common Assessment By: Your Favorite Teacher Mrs. Nancy

2. Stimulus: Something that causes a response in an organism.

3. External Stimulus: Anything OUTSIDE an organism that causes a response. Examples: 1.Sound 2.Heat 3.Light

4. Internal Stimulus: Anything INSIDE an organism that causes a response in an organism. Examples 1.Hunger 2.Thirst 3.Sleepiness

5. Phototropism A plants response to light. Example: A plant bending toward a sunlit window.

6. Gravitropism A plants response to gravity. Example: Root tips of plants growing down.

7. Thigmotropism A plants response to touch.

8. During MIGRATION, HIBERNATION and ESTIVATION animals deal with harsh (difficult, hard) conditions

9. Migration To move from one place to another.

10. Hibernation stored body fatlower body temperature.A period of inactivity during the WINTER in which an animal survives on stored body fat and has lower body temperature.

11. Estivation A period of reduced activity in the Summer.

12. Olfactory Cells Are receptors in the nose that allows you to smell. A dogs sense of smell is about 1000 times more sensitive than a humans.

13. Water Cycle Is a continuous movement of water between the surface of the Earth and its atmosphere –It keeps the Earths fresh water supply renewed. –Source of energy is the suns radiation.

14. Ground Water: water beneath (under) the Earths surface. Watershed: the region of land that is drained by a river system.