10-18-10
IN List 3 eukaryotic cell organelles. What are
their purposes? (see page 219) What are some things your body needs to
balance? (homeostasis) What happens if your body didn’t balance
one of those things?
Experimental Design Diagram
It is important to set up your experiment before jumping into something and not being organized.
Look at the sample diagram and discuss Receive a sample experiment and complete
the Experimental Design Diagram Attach the experiment and the sample EDD
in you notebook
Notes
Cornell note the following definitions:– Independent Variable– Dependant Variable– Control Group– Constant
Title
Question
Hypothesis
IV
Control 1 scoop 2 scoop 3 scoop
3 3 3 3
DV
Constants
Hot solutions Experiment
How much does calcium Chloride change the temperature of water?
If we add Calcium Chloride to water, then the temperature will change more as we add more CaCl.
Amount of calcium chloride
Average change in temperature
Amount of water, time, initial temperature of water
Practice
• Compost and Bean Plants• After studying about recycling, members of John’s
biology class investigated the effect of various recycled products on plant growth. John’s lab group compared the effect of different aged grass compost on bean plants. Because decomposition is necessary for release of nutrients, the group hypothesized that older grass compost would produce taller bean plants. Three flats of bean plants (25 plants/flat) were grown for 5 days. The plants were then fertilized as follows: a 450 g of 3 month compost, b 450 g of 6 month compost and c 0 g of compost. The plants received the same amount of sunlight and water each day. At the end of 30 days the group recorded the height of the plants (cm).
Title
Question
Hypothesis
IV
Control 3 month 6 month
25 25 25
DV
Constants
Beans and Compost
Which age of compost will cause the beans to grow the tallest?
If we add different aged grass compost to bean plants, then the beans with the oldest compost will grow the tallest
Aged compost
Height of beans
Amount of water, time, amount of light
Vocab Notes
Quantitative -observations that involve measurements
with standard scales *mass in grams
Qualitative -observations that involve verbal
descriptions and can be measured with
nonverbal scales *color, warm, cold, small, big
Notes from “Membranes”
Impermeable -must prevent most substances from being able to pass in or out
of the compartment Permeable -allows substances to
pass (water) Selectively -ability to regulate
Permeable substances to pass
SP Cont. -cell membranes only let some things pass
SP Cont. To be affective, prevents molecules
from moving freely in or out
Lipids -fat molecules Lipid bilayer -cell membrane
fat molecules arranged in 2 layers prevents
water soluble molecules from passing
Protein molecules -receptor proteins, allows specific
molecules to move in or out of a cell
cytoskeletal proteins
adhesion protein
lipid bilayer
recognition protein
receptor protein
cytoplasm
active transporter (calcium pump)
active transporter (ATPase pump)
passive transporter
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