Making Connections
Diffusion Through A Membrane
Relationships and Biodiversity
The Beaks of Finches
Random Lab Stuff
100
How do you calculate an average?
Add all the numbers
Press EQUAL!
Divide by the amount of numbers added
100
What is diffusion?
The movement of particles from an area of high concentration to an area of low concentration.
100
What is biodiversity?
A variety of living things in an area.
100
What is Natural Selection?
When nature selects what traits will be successful in a population
100
What is the purpose of a dissection?
To examine the insides of an organism.
200
What is a hypothesis?
An educated guess to a question
200
Can starch diffuse across a cell membrane? Explain why or why not.
No
Starch is too big to diffuse.
200
This is an example of a procedure called "paper chromatography". What is the purpose of this procedure?
Paper chromatography separates the different substances (pigments) in a mixture.
200
How does competition affect organisms?
Competition can decrease the survivors decreases the food and resources available.
200
What is a microscope used for?
To look at things that are too small to see with your eyes alone.
300
What is a person's pulse rate a measurement of?
Heart Beat
300
What is an indicator and provide an example from this lab.
An indicator is a chemical that changes color when it comes into contact with a specific substance.
300
Who does this blood sample belong to? Support your answer.
Mike
The pattern of the sample and Mike match perfectly.
300
What is an adaptation?
Something about an organism that helps it survive and reproduce.
300
What is the total magnification on a microscope that has an eye piece set to 10x and an objective lens set to 40x?
400x
400
What is the difference between an control group and an experimental group?
Control group is under natural conditions
Experimental group gets tested on.
400
Give an example of an indicator from this lab and how it works.
EX 1: Iodine changes from amber to black in the presence of starch
EX 2: Benedict's solution changes from blue to red/brown in the presence of glucose and heat.
400
What is this a picture of? Support your answer.
DNA
Has the base "T"
Is double stranded
400
What kind of adaptation is migration?
behavioral
400
Name 2 violations from this diagram. 
Results will vary
500
What is the difference between the Independent Variable and the Dependent Variable?
IV: is the factor being altered in an experiment by the scientist.
DV: is the change that is measured in an experiment.
500
How can added salt be dangerous to cells? Mention the word "diffuse" in your answer.
Salt can cause dehydration because water can diffuse out of the cell.
500
Which 2 organisms are the least related to each other? Support your answer. 
Lamprey and Alligator
They are the furthest away from each other.
500
Will Cactus Finches and Large Tree Finches compete? Explain your answer?
No, They eat different types of food.
500
Why can't you eat or drink any of the lab equipment? (MOHAMMED!)
The materials are unsafe, dirty, used, and can harm you in some way.
(Most of the time, it's just gross)