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Science Starter for July 29 th , 2014

Science Starter for July 29 th , 2014. Living things are called organisms. An organism is made up of one or more cells, uses energy, adapts to it environment, reproduces, grows, and develop. What things in this classroom are organisms? Why?

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Science Starter for July 29 th , 2014

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  1. Science Starter for July 29th, 2014 • Living things are called organisms. An organism is made up of one or more cells, uses energy, adapts to it environment, reproduces, grows, and develop. What things in this classroom are organisms? Why? • Write your response (in complete sentences) on the page opposite yesterday’s notes (either page 9 or 11).

  2. Needs of Living Things What are items that all living things need to survive?

  3. The Needs of Living Things • All living things must satisfy their basic needs for water, food, living space, and stable internal conditions.

  4. Water • All living things need water to survive. • Most organisms can live for only a few days without water. • Organisms need water to: • Obtain chemicals from their surroundings. • Break down food. • Grow. • Move substances within their bodies. • Reproduce.

  5. Food • Recall that organisms need a source of energy to live. • They use food as their energy source. • There are different ways to get energy.

  6. How to get energy • Autotrophs: auto- means “self”, and troph- means “feeder”. So these guys can feed themselves – usually by using the sun. • Example: all green plants and some bacteria

  7. How to get energy • Heterotrophs: hetero- means “other”, and troph- means “feeder”. So these guys need to get food from somewhere other than themselves. THEY EAT!! • Example: All animals are Heterotrophs as well as mushrooms and slime molds.

  8. Living Space • All organisms need a place to live and get food, water, and shelter. • No matter where an organism lives,it must provide what it needs to survive. • Because there is a limited amount of space on Earth, some organisms compete for space. • Trees in a forest complete for sunlight above ground. • Below ground, they compete for water and minerals.

  9. Stable Internal Conditions • Organisms must be able to keep the conditions inside their bodies stable, even when the conditions outside change. • Homeostasis: homeo- means “the same”, stasis- means “to stay” or “to be”. • Homeostasis keeps internal conditions just right for cells to function. Its like the Goldilocks position. Not too hot, not too cold, JUST RIGHT!

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