Observations & Inferences
REACHING
Experimental vs. Control Groups
Cells
Enzyme Activity
100
Does an observation come before or after an inference?
before
100
What does REACHING represent?
The 8 characteristics needed to be considered "living"
100
How many variable should you change in a controlled experiment?
one
100
Do cells try to maximize or minimize their surface area?
maximize
100
What does an enzyme do?
Speeds up reactions
200
What do we use to make observations?
our 5 senses: sight, smell, taste, touch, hear
200
How do we get energy?
Fromt the nutrients we consume
200
Which group, the experimental or control, gets the "treatment"
Experimental
200
What is the mathematical formula for the volume of a shape?
length X width X height
200
What is the term for when an enzyme is working at its best temperature
Optimal Temperature
300
The dark clouds may bring rain today. Is this an observation or an inference?
inference
300
Species obtain adaptations through ____________ over time
evolution
300
What do you manipulate in the experimental group that stays the same in the control group?
the independent variable
300
Do smaller cells have a greater or smaller surface area to volume ration?
greater
300
What does the term denature mean?
The enzyme is no longer active
400
The fire alarm that just went off at school is very loud. Is this an observation or an inference?
observation
400
Name four of the eight characteristics of life
reproduction, energy, adapt & evolve, cells, homeostasis, interdependence, notice and respond, growth and development
400
A teacher designs an experiment to test the effects of breakfast on academic success. She splits her class of 24 students into two groups. She tells half of her students to eat breakfast and the other half to not eat breakfast. All the participants are to sleep the same number of hours, get the same amount of exercise, and spend the same amount of time studying. After one month, she measures the academic performance of both groups. Which students are in the experimental group?
The students eating breakfast
400
The ___________ increases at a faster rate than the _________ when a cell is growing
volume; surface area
400
An enzyme has an optimal pH of 2. If the ph were raised to 5, what should happen to the enzyme activity?
Enzyme activity would decrease
500
What 2 groups can you categorize observations into?
qualitative and quantitative
500
Explain a relationship between organisms that shows interdependence
ex: clown fish and sea anemone
500
A teacher designs an experiment to test the effects of breakfast on academic success. She splits her class of 24 students into two groups. She tells half of her students to eat breakfast and the other half to not eat breakfast. All the participants are to sleep the same number of hours, get the same amount of exercise, and spend the same amount of time studying. After one month, she measures the academic performance of both groups. What is controlled in this experiment?
The hours of sleep, amount of exercise, and time spent studying is the same in both groups
500
Why are cells so small?
to allow for more nutrients to go in and waste to go out
500
Draw the graph of the activity of an enzyme with an optimal temperature of 50 degrees
on board
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