Page 133 - Demo

“Your Safer Source for Science”
Lab Activities
131
Botany—Lab Activities, continued
The Grass Won’t Grow—
Student Laboratory Kit
By: The Flinn Staff
Why does grass grow in one area and not another? Use this hands-on activity to introduce students to the scientific method and the effects of environmental stimuli. In this activity, seeds will be planted in two different environments and the results of growth compared. Following the rules of the scientific method, students will define the problem, make observations, develop a hypothesis, design and conduct an experi- ment, analyze data and draw a conclusion.
Complete for 30 students working in pairs.
Sun Print Paper
Just add sunlight and water to demonstrate a chemical reaction caused by ultraviolet light. At the same time you can create a photographic work of art! Put one or more objects on a sheet of this photosensitive paper and expose it to sunlight for several minutes. Then dip the paper in water and watch the “print” develop. The image appears in minutes and the print becomes permanent. Sheets measure 12.6 x 17.7 cm and come 30 sheets per package.
The Grass Won’t Grow—Student Laboratory Kit FB1653
Catalog No.
Description
Price/Each
FB1653
The Grass Won’t Grow—Student Laboratory Kit
$23.80
Catalog No.
Description
Price/Each
FB1554
Sun Print Paper
$12.40
Plants in the Spotlight—
A Photosynthesis Investigation—
Student Laboratory Kit
By: The Flinn Staff
Illuminate student’s understanding of photosynthesis, the process of “putting together with light.” This activity necessitates cooperation among lab groups as experiments are conducted to answer two impor- tant questions: Do plants prefer certain colors (wavelengths) of light for photosynthesis? How do environmental conditions affect the rate of photosynthesis? Student groups carry out experiments using Hornwort, an aquatic plant, to investigate changes in the rate of photosynthesis. These experiments involve changing the wavelengths of light, the temperature, light intensity, and the concentration of a sodium bicarbon- ate solution. To discover the answers to the experimental questions, all class data will be pooled, graphed, and analyzed. Includes all necessary chemicals, test tubes, and a set of six colored filters needed.
Complete for 10 student groups. The Hornwort aquatic plant is avail- able separately.
Sun Print Paper FB1554
Catalog No.
Description
Price/Each
FB1780
Plants in the Spotlight—A Photosynthesis Investigation—Student Laboratory Kit
$24.85
LM1211
Hornwort, Aquatic Plant
13.75/6
BOTANY—LAB ACTIVITIES continued on next page.
Plants in the Spotlight—A Photosynthesis Investigation— Student Laboratory Kit
FB1780