General Science
What is a hypothesis?
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
What enzyme was used?
Pectinase
What do you put in the beakers at the start?
Applesauce
What was the weakness regarding the thermometers?
We used more than one thermometer.
Name one of the controls of the experiment.
Type of beaker
Type of applesauce
Type of pectinase
What is the difference between the IV and DV?
IV - a variable whose variation does not depend on that of another
DV - a variable whose value depends on that of another
How many milliliters were the breakers?
100 ml
How many beakers do you need for each level trial?
3 beakers
Why was the temperature of the applesauce problematic?
Unable to read the same temperature as the environment
What is pectinase?
A digestive enzyme
What do catabolic and anabolic enzymes do?
Catabolic breakdown
Anabolic build
What brand of applesauce was used?
Mott's
At what point in the lab was the pectinase added?
After 15 minutes at the prescribed temperature.
What happened regarding the coffee filters?
We had to switch brands half way through data collection
What happened when the applesauce became too hot?
The applesauce began to boil.
What is an enzyme?
catalysts which speed up chemical reactions, but remain unchanged themselves
What was used to separate the applesauce from the juice?
Coffee Filter
How long did the applesauce stand after pectinase was added?
10 minutes
Name something that was consistent throughout the lab.
brand of applesauce
hot plate for every trial
fridge
freezer
How does temperature affect enzymes and duration?
Temperature speeds up/slows down molecular interaction
How many ounces of applesauce do you need?
24 ounces
Name one temperature that the applesauce was.
-8, 15, 22, 81 degrees Celcius
Why was letting the pectinase sit in the applesauce for the same amount of time across all the trials beneficial?
It let the pectinase have the same amount of time to break down the applesauce regardless of temperature.
Name one random and one systematic error.
Random Error:
Change in type of coffee filter used
Failure to begin the timer immediately after adding pectinase
Inaccurate readings when looking at the beakers
Systematic Error:
The thermometer didn't start at room temperature
Inaccurate temperature display on hot plate