What is life?

Complete the categories  Living  Non-Living  Once living

What is life? Characteristics of living things Cell organization Similar chemicals Growth and development Energy Use Reproduce Respond to surroundings

Characteristics of Living Things Cell organization- Living things are single celled or many celled. Similar chemicals- Living things contain some arrangement of carbohydrates, proteins, lipids, nucleic acids and water. Growth and development- growth means getting bigger over time. Development means to mature and change to become more complex Energy Use- Autotrophs can use sun’s energy to make food. Heterotrophs need to digest food to create energy Reproduce- cells can reproduce within body systems as well as within a population. Respond to surroundings- Stimulus and Response. Change in light and sound that can cause a change in behavior.

What happens when…. StimulusResponse LightSoundTemperature

Spontaneous Generation The mistaken idea that living things arise from nonliving sources Spontaneous Generation The mistaken idea that living things arise from nonliving sources  Describe Francesco Redi’s Experiment

Spontaneous Generation The mistaken idea that living things arise from nonliving sources Describe Pasteur’s Experiment

What are the needs of living things?  Water  Space  Food  Stable Internal Conditions

What are the needs of living things?  Water- Plants (autotrophs) need water in order to grow and become food for animals (heterotrophs). Water covers approximately 2/3 of the earth. Most living cells need to exist in a watery environment  Space- living things need space in which to live, find shelter and find a mate. This becomes necessary to support a population of living things.  Food- living things need to make their own food (heterotrophs) or find food (heterotrophs) so that they can derive energy to support processes of life  Stable Internal Conditions- this is maintained inside a healthy organism. Compare goose bumps to a fever.

Complete workbook pages 5-7. Complete questions page 25 # 1-3. Describe the difference between experiments by Redi and Pasteur.

Scientists Text page 28  Schleiden  Schwann  Virchow  Hooke

Cell Theory A widely accepted explanation of the relationship between cells

Cell Theory- A widely accepted explanation of the relationship between cells --- All living things are made of cells --- Cells are the basic unit of structure and function in living things --- All cells are produced from other cells.

Student Work With your group, complete the following Vocabulary list from video. Text page 33 # 1-4. Text page 42 # 1-4 Study cell parts and diagram pages