Final Practice Flashcards
My neighbor Carl wanted to increase the number of different bird species he could see from his house and thought that adding a bird feeder with feed would help. Carl put up a feeder outside of his window WITHOUT feed in it. For two weeks, Carl counted the number of different bird species that he could see from outside his window and identified 5 different species. After the two weeks had ended, Carl put up a bird feeder with seed and identified 8 different bird species over a two week period.
What is the hypothesis?
That adding a bird feeder WITH seed will increase the number of different bird species Carl can see from his house.
My neighbor Carl wanted to increase the number of different bird species he could see from his house and thought that adding a bird feeder with feed would help. Carl put up a feeder outside of his window WITHOUT feed in it. For two weeks, Carl counted the number of different bird species that he could see from outside his window and identified 5 different species. After the two weeks had ended, Carl put up a bird feeder with seed and identified 8 different bird species over a two week period.
What is the control?
The bird feeder without feed
My neighbor Carl wanted to increase the number of different bird species he could see from his house and thought that adding a bird feeder with feed would help. Carl put up a feeder outside of his window WITHOUT feed in it. For two weeks, Carl counted the number of different bird species that he could see from outside his window and identified 5 different species. After the two weeks had ended, Carl put up a bird feeder with seed and identified 8 different bird species over a two week period.
What is the Independent Variable?
The presence of a bird feeder with/without feed.
My neighbor Carl wanted to increase the number of different bird species he could see from his house and thought that adding a bird feeder with feed would help. Carl put up a feeder outside of his window WITHOUT feed in it. For two weeks, Carl counted the number of different bird species that he could see from outside his window and identified 5 different species. After the two weeks had ended, Carl put up a bird feeder with seed and identified 8 different bird species over a two week period.
What is the Dependent Variable?
The number of different bird species Carl can see from his house.
My neighbor Carl wanted to increase the number of different bird species he could see from his house and thought that adding a bird feeder with feed would help. Carl put up a feeder outside of his window WITHOUT feed in it. For two weeks, Carl counted the number of different bird species that he could see from outside his window and identified 5 different species. After the two weeks had ended, Carl put up a bird feeder with seed and identified 8 different bird species over a two week period.
What is the first step in the scientific method?
Observe
What is the magnification of the ocular within the compound microscopes used in the lab?
10x
As magnification increases, field of view:
decreases
What is the first objective that should be used when starting to examine a specimen?
4x
If I was using a compound microscope with a 5x ocular and a scanning objective (4x), what is the total magnification that the specimen is being viewed under?
20x
What part of the microscope can be used to adjust the amount of light that reaches the slide where the specimen is found?
Diaphragm
After centering and focusing the specimen at the scanning objective, what should my next move be to view the specimen closer?
Low power objective (10x)
What would happen to a potato that is placed in an isotonic solution?
Nothing
What would happen to a potato that is placed in a hypertonic solution?
Shrink
Why does a potato placed in a hypertonic solution shrink?
Since the salt content of the water is more than the salt content of the potato, the water moves out of the potato and into the surrounding solution until an equilibrium is reached.
Diffusion states that a substance will move from a __________ concentration to a __________ concentration without the use of energy.
Higher, Lower
Explain the reason why the corn starch solution within the dialysis tubing was able to turn black/purple when it was placed in the Iodine solution
The iodine molecules are small enough to move through the tubing and are able to diffuse into the cornstarch. The cornstarch molecules are too big to move through the tubing, so it’s unable to diffuse out into the water. So, the cornstarch inside the tubing turns black, while the water outside the tubing remains the same color.
