1. How did cells get named? Mention who named them and why?
Cerebral Stretch # 23
How did cells get named? Mention who named them and why?
Who first saw single celled organisms?

2. Cerebral Stretch # 24
Record your observations of the Moving Water demo we started yesterday. Mention or draw how it looked yesterday and how it looks today.
Record your observations of the Febreeze Demo
Check that you have numbered all of your Cerebral Stretches starting at number 4 or 5. Be sure your name is on the paper. Staple pages if necessary and turn it in.

3. Materials your group should have:
Lab sheets with your names on them
Marker to label your cups
Small beaker to measure salt
Large beaker to measure water
Two Solo cups – red will have salt water, blue will have fresh water
A small tray or wax paper to put on the scale before you weigh the potato
Spoon for stirring salt water
Salt
You will go to one of the counter sinks(not the one on my desk) to get your water.
Your scale is in your table bucket

4. Cerebral Stretch # 25 Start a new sheet of paper
Make observations of Moving Water demonstration
Watch the video clip and make observations.
What is the cause of the differences you observed?

5. Cerebral Stretch #26/27
Compare and contrast osmosis and diffusion. List one way they are similar and one way they are different.

6. Cerebral Stretch #28
What is the difference between active and passive transport?
How are they similar?
Make a T chart or an H chart to show this.

8. Cerebral Stretch #29
Use the following terms in sentences (as many as you need) to demonstrate your understanding of each word and how it relates to the others on the list. The words do not have to be in this order.
Organ System
Tissue
Cell
Organ
Organism

9. Cerebral Stretch #30
Make up a simile or a metaphor that contains one or more of the topics discussed in this chapter.
active transport passive transport
osmosis diffusion
endocytosis exocytosis
For example:
“Learning is like active transport. You have to exert some energy to learn. It will not just come into your brain by diffusion.”

10. Cerebral Stretch #31
How are solar cells like photosynthesis in plants?
How does solar heating work?
A new kind of solar cell uses the sun’s energy to convert water into energy- rich hydrogen gas, which can be used as fuel. This process also produces oxygen. How are these new solar cells similar to photosynthesis?

11. Cerebral Stretch #32 Where does photosynthesis take place?
What is needed for it to take place?
What does it produce?

12. Cerebral Stretch #33
Explain how endocytosis and exocytosis differ?

13. Cerebral Stretch #34
Make up a simile or a metaphor that contains one or more of the topics discussed in this chapter.
active transport passive transport osmosis diffusion
endocytosis exocytosis photosynthesis respiration
For example:
“Learning is like active transport. You have to exert some energy to learn. It will not just come into your brain by diffusion.”

14. Cerebral Stretch #35
Jan Baptista Van Helmont ( ) was the first to use the term “gas,” and to determine that there were gasses separate from the atmosphere.
He also discovered that the gas given off by burning charcoal is the same as that given off by fermenting grape juice. For his work he is known as the father of biochemisty. He did not know the name of this gas but you should.
What is this gas?
Where else could it be found?
What is biochemistry?

15. Cerebral Stretch #36
What was the independent variable in your elodea lab yesterday? Hint: you have one in the light and one in the dark.
What was the dependent variable in your elodea lab yesterday?
What was the purpose of blowing into the bromothymol blue at the start of the experiment?