January 31st blog
Explain the two types of active transport and what occurs when active transport takes place.
Have a grat weekend—Mrs. D.
Home » January 26th, 2009
Entries posted on “January, 2009”
January 30th Blog
Describe the difference between active and passive transport? What happens when too much water enters a cell?
Blog Jan 29th
Why were the eggs soaked in vinagar? What happened to the shell of the egg? When the egg was covered by corn syrup, did the egg lose weight or gain weight? Was the egg in a hypertonic or hypotonic solution?
What occured when distilled water was poured in the cup? When you weighed the egg after [...]
Jan. 28th Blog
Rice is a carbohydrate, what color does rice turn when iodine comes in contact with it? When iodine was dropped in the water and absorbed through the semi-permeable plastic sandwich bags—what process has occured? Is this a form of active or passive transport? Explain.
Blog Jan.27th
In class you saw a few demonstrations representing the process of diffusion and osmosis. When we spayed the stinky body spray where particles moved from a high concentration to a low concentration, what process would you say occurred? When we dropped the blue food coloring in water, explain what happened. Explain the word that describes [...]
Blog Jan. 26, 2009
The cell membrane is composed of phospholipids that are semi-permeable. Some very small elements can diffuse through the membrane. How would particles go through the membrane without the use of energy if they can’t fit through the phospholipids? If no energy is required, what type of transport is occuring–passive or active?
SAT Blog Friday January 23rd
six questions
Jasmine wanted to find out if hot water froze faster than water at room temperature. She filled one ice cube with tray with hot water and another ice cube tray with room temperature water. She put the trays into the freezer and checked them every hour to determine if ice had formed.
1. The next [...]
Class Information about Diffusion and Osmosis
This week you learned about diffusion and osmosis. We told silly stories to get the point across. Here are some pointers that you should keep in mind when thinking of these two processes.
Diffusion deals with concentrated particles moving from a higher concentration to a lower concentration.
examples: —-diffusion of blue food coloring through water
—-when iodine was [...]
Robot Inspects Wind Energy Converters
The material of wind energy converters must withstand intense forces. Are rotor blades damaged? A new robot inspects wind energy converters more precisely than a human ever could. It detects the minutest damage – even below the surface.
It appears reliably and appears alone. Nimbly and quickly, it pulls itself up a rope meter for meter [...]
Five Invasive Plants Threatening Southern Forests In 2009 Identified
U.S. Forest Service Southern Research Station (SRS) Ecologist Jim Miller, Ph.D., one of the foremost authorities on nonnative plants in the South, today identified the invasive plant species he believes pose the biggest threats to southern forest ecosystems in 2009.
