Student Name:
Access Code (located on the lid of your lab kit):
Pre-Lab Questions:
1. Which of the following are testable using scientific
... [Show More] experimentation.
a. Are there more seeds in a medium sized Red Delicious Apple or a medium size Green Granny Smith Apple? Yes, it is testable using the scientific method
b. Why do people smoke cigarettes? No, it is not testable using the scientific method
c. What happens to your blood glucose level if you do not eat lunch? Yes, it is testable using the scientific method
d. Which planet is the most interesting one to study? No, it is testable using the scientific method
e. Which objects are attracted by a magnet: a metal paperclip, copper penny, or aluminum foil? Yes, it is testable using the scientific method
2. For each of the following questions, write a reasonable hypothesis using the “If (independent variable), then (dependent variable)” format.
a. Does water affect the growth of a plant?
If plants are watered then plants will grow.
b. Does temperature affect the amount of sugar that dissolves into tea?
If the temperature of tea rises then more sugar will dissolve .
c. Does the volume of a container affect how quickly water will evaporate from it? If a container is larger then water will evaporate faster.
Experiment 1: Testable Observations
Determine which of the following observations are testable. For those that are testable, answer the following:
Determine if the observation is qualitative or quantitative. Write a hypothesis and null hypothesis.
What would be your experimental approach?
What are the dependent and independent variables? What are your controls - both positive and negative?
Observations
1. A plant grows three inches faster per day when placed on a window sill than it does when placed on a on a coffee table in the middle of the living room.
Testable?- Yes
Hypothesis- The plant will grow faster if its placed on the windowsill, instead of the coffee table. Null Hypothesis- If the plant is place on the coffee table it will not grow as fast.
Experimental Approach- Get two plants of the species, size, and age. Place one on the windowsill and one on the coffee table. Measure them at the same time each day and record the results.
Dependent Variable- The dependent variable is how fast it grows Independent Variable- The Independent variable is the sun light Control(s)- No controls were used in this experiment
2. The teller at the bank with brown hair and brown eyes is taller than the other tellers.
Testable?- This is not a testable experiment
Hypothesis- I can’t make a hypothesis because it is not test able
Null Hypothesis- I can’t make a null hypothesis because it is not test able
Experimental Approach- This experiment can’t be done Dependent Variable- There are no dependent variables Independent Variable- There are no independent variables
Control(s)- No controls were required because the experiments cannot be done.
3. When Sally eats healthy foods and exercises regularly, her blood pressure is 10 points lower than when she does not exercise and eats fatty foods.
Testable?- Yes, this is testable
Hypothesis- Sally’s blood pressure will go down if she exercises and eats healthy food.
Null Hypothesis- - Sally’s blood pressure stay the same if she exercises and eats healthy food. Experimental Approach- First, measure and record Sally’s blood pressure everyday foe a week on her current diet and exercise level. Then the next week, increase Sally’s exercise levels and improve her diet, then measure and record the results.
Dependent Variable- Sally’s blood pressure is the dependent variable
Independent Variable- Eating healthy food and getting more exercise is the independent variable Control(s)- Eating healthy and exercising is the positive control. Keeping the same diet and not exercising is a negative control.
4. The Italian restaurant across the street closes at 9 pm, but the one two blocks away closes at 10 pm.
Testable?- This is not a testable experiment
Hypothesis- I can’t make a hypothesis because it is not test able
Null Hypothesis- I can’t make a null hypothesis because it is not test able
Experimental Approach- This experiment can’t be done Dependent Variable- There are no dependent variables Independent Variable- There are no independent variables
Control(s)- No controls were required because the experiments cannot be done. [Show Less]