Transcript Please Pass the Bread Lab Sheet

PLEASE PASS THE
BREAD
I can…set up an experiment to
test the origins and needs of
life.
• Take out your homework.
Warm Up: What are the 4
needs of life?
Please Pass the Bread
• Problem: We need to determine what is
needed to get mold on bread to grow.
• Develop a question.
Please Pass the Bread
• Brainstorm: What factors would affect the
growth of bread mold?
• Develop a hypothesis.
Materials:
Plastic Bag
Dropper
Sharpie
Paper Towel
Tape
Slice of Bread
Cup of water
Ruler
Procedure:
• What will you do to test your hypothesis?
• Place slice of bread on paper towel.
• Using the dropper, add droplets of water to the surface of
the bread until the bread is moist, but still coherent.
• Leave the bread exposed to the air for 30 minutes.
• Place bread in bag, seal bag, tape bag, put your name on
the top of the bag (not to interfere with observations),
place bag on window sill.
• We will make observations for the next 5 days to observe
changes compared to our control.
How do we measure AREA?
• Remember- we use metric in science class!
• No naked numbers- always mark the unit!
• Area is squared!
• Length x Width
While you wait…
• With your group, complete the enrichment
activity on Pasteur’s Experiment (pg 5) with
your lab group.
Wrap Up:
• Why was it necessary to leave your
bread exposed to the open air?