Download Characteristics (Chapter 1)

Objective: You will be able to differentiate
between living and nonliving things.
Do Now:
• Read “Maintaining Internal balance” of page 19
• Define Homeostasis
Characteristics of living things
• All living things must perform certain
functions to stay alive
• Non living things do not do all of these
• What activities can you think of?
Life Functions
•
Nutrition
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Cell Respiration
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Respond to the environment
Excretion
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Combine simple substances
Growth
Reproduce
Regulation
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•
Moving things throughout itself
Synthesis
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•
•
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Breakdown food to release energy
Transport
•
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Obtain and breakdown nutrients
Ridding itself of waste
Response
•
React to internal or external stimuli
Characteristics of living things
• All living things share specific
characteristics
• Non living things do not have all of these
Life Characteristics
•
Homeostasis
•
•
Metabolism
•
•
Maintain a stable internal environment
All of the chemical reactions in the organism
Cells
•
All organisms are made up of at least one cell
Objective: You will be able to identify cells using a
compound light microscope.
Do Now:
• Read “Made up of cells” on p. 17
• How many different cells are found in the human
body?
Objective: You will be able to list the levels of
organization of life.
Do Now:
• Read “Branches in Biology” on p. 20
Living things and cells
•
•
•
•
All living things are made up of one or
more cells
Cells are the functional unit of living
things
Some organisms have only one cell and
are called unicellular
Some are even made up of trillions of
cells
Do you smell
what the Rock’s
cooking?
Organization levels
•
Biologists break life down into different
levels
– This makes it easier to study life
•
The order from smallest to largest
– Cells, tissues, organs, organ systems and
organism
Cells make up living things
Tissues are groups of cells that work
together
Organs are made of tissues working
together
Organ systems are made of organs that
work together
Organism is made of a group of
organ systems working together
Objective: You will be able to design a scientific
experiment.
Do Now:
• Read “Explaining and Interpreting Evidence” on
p. 5
• Define Hypothesis
Scientific Experiments
• State a problem
• Provide a hypothesis
• Identify:
– Independent variable
– Dependent variable
• Control set up
• Give a conclusion
Example
• Problem
– Will a plant grow more in saltier water
• Hypothesis
– A lower salt concentration will make the plant
grow taller
• Independent variable is the salt
concentration
• Dependent variable is how tall the plants
grow
Pair Work
• Design an experiment to show which color
of light works best for photosynthesis.
• Go through the steps in the previous slide
• Each person needs to complete this in
their notebook
Objective: You will be able to design a scientific
experiment.
Do Now:
• Take the ditto at the back table
• Answer the questions individually
Now we are going to do a real
experiment.
• Which paper towel absorbs water the
best?
– Choices:
• Bounty
• Brown generic towels
• White school towels
Towel experiment
• Take out a new piece of paper. This will
count as one of the labs you need to sit for
the Regents.
• Write your name at the top
• Underneath your name, write the following
lab title “Paper Towel Absorbency”
Your Name
“Paper Towel Absorbency”
Purpose:
Materials: