Bio EOC Review Packet 2.doc - Biology EOC Review Packet...

Biology EOC Review Packet
Scientific Method Brodyn Wilson
1) What is the difference between a hypothesis and a prediction?
Prediction: ____ A prediction is a guess about what an outcome will be or what will happen in the future, usually based upon a hypothesis.
___________________________________________________________________________________________
2) Why do scientists use a control group in experimental design?
__ To make sure there aren’t any other variables at play except the ones they want during an
experiment_____________________________________________________________________________________________________
3) Susie wondered if the height of a hole punched in the side of a quart-size milk carton would affect how far from the container a liquid would spurt when the carton was full of the liquid.
She used 4 identical cartons and punched the same size hole into each. Susie recorded her results in the chart below.
a) What is the independent variable? ____ A variable that does not depend on another variable. ___________________
b) What is the dependent variable? _ a variable that does depend on another variable.
______________________
c) Write a hypothesis for this experiment.
. ____________________________________ The higher the height of the hole the more liquid that spurts out. _________________
d) Prediction the distance (in cm) if the height of the hole punched in the container was 25 cm? __________ 50cm__________________
e) Graph Susie’s results.
Height of Hole(cm)
25
20
15
10
5
0
10 20 30 40 50
Distance of Liquid spurts(cm)
f) Describe the relationship between the height of the hole and the distance of the liquid.
________________ For Every 5 centimeters in height there is 10 centimeters in distance of liquid spurts.
_________________________________________________________________________
4) A group of college students were given a short course in speed-reading. The instructor was curious if a monetary incentive would influence performance on a reading test taken at the end
of the course. Half the students were offered $5 for obtaining a certain level of performance on the test, the other half were not offered money.
Independent variable: _____________________________ the money given.
Dependent variable: ____ Performance on the test.
Experimental group: __________ Students not offered money.
Control group: ___ Students offered money.
Water Brodyn Wilson
5) What is cohesion? _______ When two or more molecules that are different stick together.