Organisms and their Needs

Organisms and their Needs

Lesson goals

• To understand the needs that all living things have

• To be able to describe how organisms survive while seeking out their needs.

State Standards

• 6.LS.1 Investigate and describe how homeostasis is maintained as living things seek out their basic needs of food, water, shelter, space, and air

Everything is connected

• In the forest all things affect the things around them.

• In nature, no organism survives on its own.

• All living things depend on other living and nonliving things to survive.

Open Ended

What are the 4 needs that all organisms need to survive?

Survival Challenges

• Whether it's a bacteria, a flower, or a tiger, all species must do 3 things to survive

• Get and use energy

• Reproduce

• Maintain their structure

4 Needs for Earth Life

• Oxygen or Carbon Dioxide

• Water

• Food

• the right environment/shelter/temperature and space.

Poll

Is Fire a living thing?

• Yes

• No

Oxygen and Carbon Dioxide

• Cells need oxygen for the many chemical reactions in them

• Animals breath oxygen

• Fish getoxygen from water

• Trees need carbon dioxide to make glucose

• Some organisms need other gasses

Water

• On our planet all organisms need water, all the way down to their cells.

• Plants absorb water through their roots

• Animals dring water

• Bacteria allow water to pass through their cell membranes

Food

• All creatures need food for energy and nutrients

• Food also provides vitamins and minerals needed for our bodies to work.

• Iron, for instance, is needed to build red blood cells that carry oxygen to our cells.

Environment

• Why don't polar bears live in the desert?

• All organisms have adaptations that make them suited for a particular environment

• They must live in a place with the conditions that allows them to survive.

Climate

• Climates and temperatures vary across our planet

• Organisms usually have adaptations for a particular climate

• Penguins are adapted to very cold climates

• Many lizards are only adapted to relatively warm climates.

Shelter

• Shelter helps many animals survive

• It provides for temperature control

• It also provides protection

• Anything that protects creatures from severe weather is a shelter

Space

• Not that kind of space

Space

• All organisms need a certain amount and kind of space to survive.

• If too many animals live in an area, they will start to run out of food.

• A single African Elephant can eat 330 lbs of vegetation in one day and drink 55 gallons of water!

4 Needs for Earth Life

• Oxygen or Carbon Dioxide

• Water

• Food

• the right environment/shelter/temperature and space.

Multiple Select

Which of the things listed below are needed to survive on Earth?

• Water

• Air

• Waste

• Food

Multiple Choice

Which organisms listed do not need oxygen to survive

• Tigers

• flowers

• Bacteria

• Bears

Open Ended

Why do organisms need space?