Science Probe II Technology Activities
1. There has been an effort to find a technique for artificial
photosynthesis in recent years. The buildup in carbon dioxide from the
burning of fossil fuels, the devastation of the rain forests, and human’s
dumping sewage in the ocean have been motivating factors to find a way
to carry out photosynthesis without plants. Conduct an Internet search
to find out what progress has been made toward the development of artificial
photosynthesis. It might also be helpful to correspond through e-mail
or talk in a web discussion site with a scientist. Prepare a multimedia
presentation to inform your classmates of what you have learned. Below
is a web site to get you started:
"Green Light," article by Neal Caudle, in Winter 1998
issue, Endeavors magazine
2. The cell membrane plays a role in the active transport
of some substances into the cell and prevents the passing of other substances
into the cell. Conduct an Internet search to find out how the cell membrane
can let some substances into cells but keep other substances out. Look
for answers to these questions:
It might also be helpful to correspond through e-mail or talk in a web discussion
site with a biologist. Prepare a multimedia presentation to inform your
classmates of what you have learned.
a.Of what is the cell membrane chemically made?
b.What does the cell membrane look like when examined by an electron
c.What mechanism does it use to actively transport materials into a
d.What mechanism does it use to prevent materials from entering a cell?
Activity 15D – Use a word processing
program to make the four-column table, and label the columns as directed
in this activity. As you read the sections in the textbook, take your
notes on the computer. When completed, print the document and secure it
in your SCIENCE PROBE Logbook.
Activity 15E – Use a spreadsheet
program to make your data table as directed in the activity. Record the
data in the spreadsheet as you perform the activity. Use the mathematical
functions of the spreadsheet to do the calculations for finding the Surface
area (in cm2), Volume (in cm3), and Ratio of surface area/volume automatically
as you enter the data. When completed, print the table and secure it in
your SCIENCE PROBE Logbook where you will answer the discussion questions.