Classroom activity
Lesson that can be completed within 45-50 minutes in a standard school classroom.
When I was little,I heard about Sir Issac Newton's math.
Now this math is harder but simple.
134->5<=(31)
 
2<<<<<<<<<<(10)
 
334+23>=(56)
 
 
>=1 less <=1 more
Students take what they know about earthquake, volcano and mid-ocean ridge distributions (The Big One and Plate Patterns) and put it together with what they know about convection in the ...
What drives the motion of the Earth’s tectonic plates? Partly, it is convection, the process by which heat energy is transferred by currents in a liquid or gas. Convection currents ...
Kilauea Crater, Hawaii Pu'u 'O'o crater at dusk. Image courtesy of USGS.Starting with an earthquake epicenter map (generated by students in The Big One activity), students add information about where ...
Materials
- Frogs (order them from Carolina Biological catalog # 22-7444, 22-7445, 22-7446, 22-7464, 22-7465, 22-7466, between $3.35 - $5.95 depending on the quantity ordered and whether there is any color injection)
- Paper plate or dissection tray
- Scissors
- Scalpel or razor blade
- Forceps
- Optional: dissection probes
- Optional: dissection pins (especially useful if you have dissection trays on which to use them)
Materials
- Flowers, possibly of several different species for cross-species comparisons. Almost any flower may be used although the anatomy is more easily distinguished in some flowers than others. Some common flowers with clearly differentiated parts include:
 Sarracenia flower dissection: Image courtexy of Noah Elhardt
- Lily
- Iris
- Daffodil
- Tulip
- Wisconsin fast plant
- Peas
- Poppies
- Gladiolus
- Paper plates/plastic trays
- Scissors or razor blade (to open the ovary)
- Hand lens
- Optional: tweezers
- Optional: dissecting scope
Sarracenia flower dissection Image courtexy of Noah Elhardt
Leopard frog in duckweed Image courtesy of Steven Dunlop
To learn about the structure and function of living things, it is essential to ...
 Chlorophyll extractionSummary
Chlorophyll is the pigment in plants that captures sunlight energy and uses it to drive photosynthesis. While chlorophyll does give plants their characteristic green color, chlorophyll actually comes in many colors and subtypes ranging from green to yellow to orange to red. In this experiment, students use paper chromatography to separate the many pigments from one another. First the pigments are extracted from the plants by simply crushing the plant cells open on the filter paper with the edge of a penny. When the filter paper is then immersed in rubbing alcohol, the pigments are carried upwards through capillary action. The smallest pigments travel more quickly and thus separate from the larger pigments that remain closer to the origin line.
To solidify students’ conceptualization of cells, students build a model of a cell in a ziplock bag using polyvinyl alcohol slime as cytoplasm. So far, students’ experience with cells has ...
What does it mean to be alive? Is a cactus alive? Is a seed alive? Is the air we breathe alive? What are the necessary characteristics? To hook students into ...
|
