4th Six Weeks Review for Common Assessment

By:

Your Favorite Teacher

Mrs. Nancy

Stimulus:

• Something that causes a response in an organism.

External Stimulus:

• Anything OUTSIDE an organism that causes a response.

• Examples: 1. Sound

2. Heat

3. Light

Internal Stimulus:

• Anything INSIDE an organism that causes a response in an organism.

• Examples1. Hunger

2. Thirst

3. Sleepiness

Phototropism

• A plant’s response to light.

• Example: A plant bending toward a sunlit window.

Gravitropism

• A plant’s response to gravity.

• Example: Root tips of plants growing down.

Thigmotropism

• A plant’s response to touch.

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

Migration

• To move from one place to another.

Hibernation

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

Estivation

• A period of reduced activity in the Summer.

Olfactory Cells

• Are receptors in the nose that allows you to smell.

• A dog’s sense of smell is about 1000 times more sensitive than a humans.

Water Cycle

• Is a continuous movement of water between the surface of the Earth and its atmosphere– It keeps the Earth’s fresh water supply

renewed.– Source of energy is the sun’s radiation.

• Ground Water: water beneath (under) the Earth’s surface.

• Watershed: the region of land that is drained by a river system.