Chapter 1 Section 3Objectives

Describe the characteristics of living things.How can life be studied at different levels?

Vocabulary

Create a flapbook for the following words (begins on p.16):• Biology• Cell• Sexual reproduction• Asexual reproduction• Metabolism• Homeostasis• Stimulus

Interactive

• Quickwrite:

What is Biology??

Biology

The Study of Life

Is it alive??

In your notes copy the list below. By each tell if it is alive or not.Object Alive or Not??

Beetle

Fire

Water

Grass

Rock

Robot

Clock

Moss

Characteristics of Living Things

• Video Clip—Life• In your group discuss and write a list of requirements for something

to be ALIVE…

Characteristics of Life

• Biologists have established that all living things share 7 Characteristics of Life.

Cells Stimulus Homeostasis

Metabolism

Growth and Development

Reproduction

Change through Time

All Living Things…

• Are made up of units called cells• Reproduce• Grow and develop• Obtain and use materials and energy• Respond to their environment• Maintain a stable internal environment (homeostasis)• Change over time (as a group)

Cells

• A CELL—smallest unit of life• Unicellular—organism with only one cell• Multicellular—organism with many cells

Reproduction

• Sexual Reproduction—2 cells from different parents unite to produce a new organism• Asexual reproduction—A single parent divides in half to form two new

organisms

Growth and Development

• All organisms have a life cycle

Materials and Energy

• Metabolism—the process of building up and breaking down materials for energy• Photosynthesis, eating

Response to Environment

• Reacting to the environment around the organism• Example—a plant seed germinates and sprouts in response to

warmer, wetter weather

Maintaining Internal Balance

• Homeostasis—process by which organisms keep their internal conditions stable• Example—Shivering in the cold to stay warm, sweating to cool off

Change over time

• Evolution—As a group or species, organisms will change or evolve over time.• Example—plants over millions of years adapting to the lack of water

in deserts

Characteristics of Living Things Song

INTERACTIVE

• Characteristics of Life Booklet• 7 sections• For each section• Explain what it is in 1-2 sentences• Illustration

Levels of Organization

• Biology can be studied at many levels from very broad to very specific• Copy the table “Levels of Organization” on page 21 into your notes

Assessment

• Answer questions #1,2, and 3 on page 22