Mrs. Simmons' Blog: January 2012

Friday, January 27, 2012

Show Some Motion!

Project: Motion
Goal: Identify the motion of several common objects and calculate how fast each one moves.
To complete this project, you must

measure distance and time carefully
calculate the speed of each object using your data
prepare display cards of your data, diagrams, and calculations
follow the safety guidelines in Appendix A

Plan It!
With your classmates, brainstorm several examples of objects in motion, such as a feather falling, your friend riding a bicycle, or the minute hand moving on a clock. Choose your examples and have your teacher approve them. Create a data table for each example and record your measurements. For accuracy, repeat your measurements. Then calculate the speed of each object. Make display cards for each example that show data, diagrams, and calculations.

Speed = Distance/Time

Create a graph!

Thursday, January 26, 2012

Great Job!

Great Job to my 4th, 5th, and 6th period science classes!! You got it! Hypotonic, hypertonic, isotonic solutions!!

Anatomy Students!!!!

Read over your notes at least one time per day!! This will help you! I promise!!! :)

Tuesday, January 24, 2012

Osmosis Review

Type of Solutions
	If the concentration of solute (salt) is equal on both sides, the water will move back in forth but it won't have any result on the overall amount of water on either side. "ISO" means the same
	The word "HYPO" means less, in this case there are less solute (salt) molecules outside the cell, since salt sucks, water will move into the cell. The cell will gain water and grow larger. In plant cells, the central vacuoles will fill and the plant becomes stiff and rigid, the cell wall keeps the plant from bursting In animal cells, the cell may be in danger of bursting, organelles called CONTRACTILE VACUOLES will pump water out of the cell to prevent this.
	The word "HYPER" means more, in this case there are more solute (salt) molecules outside the cell, which causes the water to be sucked in that direction. In plant cells, the central vacuole loses water and the cells shrink, causing wilting. In animal cells, the cells also shrink. In both cases, the cell may die. This is why it is dangerous to drink sea water - its a myth that drinking sea water will cause you to go insane, but people marooned at sea will speed up dehydration (and death) by drinking sea water. This is also why "salting fields" was a common tactic during war, it would kill the crops in the field, thus causing food shortages.