u nit 3 l esson # 1 w hat i s l ife ? swbat determine the characteristics of all living things

UNIT 3 LESSON # 1 WHAT IS LIFE?

SWBAT Determine the characteristics of all living things.

LIVING THINGS ARE ORGANIZED Any living thing is called an Organism

The tiny particles that make up all living things are called Cells.

A Cell is the smallest unit of a living thing that can carry out life functions

LIVING THINGS GROW AND DEVELOP Normally when an organism grows, it is

increasing the size of the cells in its body

Many organisms change completely from birth until adulthood and go through Metamorphosis like a frog or a butterfly.

Respond to SurroundingsLiving things respond to their surroundings. A

change in an organism’s surroundings that causes it to react is called a stimulus.

A organism reacts to a stimulus with a response. This is a change in action or behavior.

ENERGY USE AND REPRODUCTION

All living things need energy to survive. Some living things make food and Others need to search and find food to eat, like animals.

Another characteristic of organisms is the ability to reproduce. This means they produce offspring (babies) that are similar to the parents.

INITIAL ACTIVITY UNIT 3 LESSON # 1 (DAY 2) 1. A change in an organism’s surroundings

is a _____________.

2. A bird sitting in a tree flies away as you walk by. Which characteristic of life explains the birds behavior?

3. Trees do not move like birds do, but they are both living things. Explain why.

VOCABULARY Unicellular- Organisms made up of one cell.

Multicellular- Organisms made up of many cells.

Metabolism- how organisms take energy from the food they eat. (chemical reactions)

Growth- the process of getting larger

Development- the process of change that occurs during an organisms life.

TWO TYPES OF REPRODUCTIONAsexual Reproduction- Only one parent

needed to produce an offspring. The offspring is identical to the parent.

Sexual Reproduction- Two parents combining genes to produce offspring that differs from both parents. Each offspring is unique.

Organisms that lay eggs or give birth to

live young, reproduce in this way.

Sexual Reproduction

Asexual Reproduction

WHAT DO ALL LIVING THINGS NEED? 1. A Place to Live- All organisms need a habitat that is

suited to their needs. There also needs to be enough space for the organism to grow.

- Can a cactus survive in Antarctica? Would a great white shark be able to live in the desert?

2. WATER Water is essential for life. All organisms take in water from their

surroundings to take in chemicals needed to break down food, grow and move substances in their bodies.

3. FOOD SOURCES Organisms that can make

their own food (like plants) are called Autotrophs.

Organisms that cannot make their own food (like animals ) are called Heterotrophs.

4. STABLE INTERNAL CONDITIONS Homeostasis is an organism’s

ability regulate (change or keep the same) things in it’s body to keep it alive.

Example: Even though it is cold outside, our body temperature stays the same at 98.6 degrees.

ASSESS YOUR UNDERSTANDING 1. Which basic need is a fox

meeting by feeding on berries?

2. The Arctic Fox has thick white fur in the winter and shorter brown fur in the summer. How would this help the fox maintain homeostasis?