# 1 Scientific Method Question: All scientific investigations begin with: a)Forming a hypothesis b)Conducting an experiment c)Asking a question or observing

# 1 Scientific Method

Question:All scientific investigations begin with:a) Forming a hypothesisb) Conducting an

experimentc) Asking a question or

observing a problemd) Forming a conclusion

Answer:

c) Asking a question or observing a problem


Question: The steps of the scientific method are listed below, but not in correct order. What is the correct order of the steps in the scientific method?a) Conduct the experimentb) Form a hypothesisc) Form a conclusiond) Report your resultse) Make an observationf) Analyze the data

Answer:

e) Make an observationb) Form a hypothesisa) Conduct the experimentf) Analyze the datad) Report your resultsc) Form a conclusion

g) Publish your resultsh) Retest


Question:Often a scientist collects data that can be recorded in numbers. The scientist might measure the length of growing root tips or determine the rate of a particular reaction. What is the name of this type of data?

Answer:

Quantitative


Question:What name is given to the type of data that is descriptive rather than numerical?

Answer:

Qualitative


Question:The data collected during an experiment are of little use unless they are organized.In what ways might data be logically organized?

Answer:

Pie chartBar graphLine graph


Question:Forming a hypothesis is an important step in the scientific method. What is the purpose of the hypothesis in an experiment?

Answer: Your hypothesis is the question your are trying to answer with your experiment. It predicts the outcome of your experiment.


Question:A student is conducting an experiment to test how temperature might affect the action of a particular enzyme.How might a hypothesis for this experiment be stated?

Answer:

If you increase the temperature during the reaction, the enzyme will stop working.


Question:True or False?Although a hypothesis may be supported by evidence, it can never be proven true beyond all doubt since new data might indicate that a hypothesis does not hold true in all instances.

Answer:

True


Question:

How is it determined if a hypothesis is correct or incorrect?

Answer:

You must analyze the results of the experiment.

The results will either support or not support your hypothesis.


Question:Define the term “controlled experiment.”

Answer:

A scientific investigation in which both the control group and experimental group(s) are kept under similar variables apart from the factor under study so that the effect that factor can be identified or determined.


Question:Every experiment should consist of two groups.

Name the two groups.

Answer:

Control groupExperiment group(s)


Question:In an experiment, what is the purpose of the experimental group?

Answer:

The experimental group is the group being tested and is compared to the control group.


Question:In an experiment, what is the purpose of the control group?

Answer:

A control group is a baseline group that receives no treatment or a neutral treatment in the experiment.


Question:There are two variables in every experiment.

Name the two variables.

Answer:

IndependentDependent

# 15 Scientific MethodQuestion:Which one of the following steps would occur last?a) Analyze the data from the

experiment.b) Organize the data into charts,

tables, graphs.c) Publish results.d) Form a conclusion based on

the data.e) Repeat the experiment to

determine if the data from the first experiment is reliable.

Answer:

e) Repeat the experiment to determine if the data from the first experiment is reliable.


Question:Give an example of an experiment that uses quantitate data.

Answer:

Bead Sorting Lab


Question:

Give an example of an experiment that uses qualitative data.

Answer:

Animal testing – rashes, hair loss

Saving Fred lab


Question:A student wanted to know which sugar would yield the greatest amount of energy of the cell when metabolized by mitochondria. The student mixed yeasts in three different sugar/water solutions: maltose, glucose and sucrose.

Write a possible hypothesis for this experiment.

Answer:

If I compare different types sugar, glucose will yield the greatest amount of energy for the cell.


Question:

A student wanted to know which sugar would yield the greatest amount of energy of the cell when metabolized by mitochondria. The student mixed yeasts in three different sugar/water solutions: maltose, glucose and sucrose.

What is the purpose of the yeast?

Answer:

The yeast uses the sugar to make energy.


Question:A student wanted to know which sugar would yield the greatest amount of energy of the cell when metabolized by mitochondria. The student mixed yeasts in three different sugar/water solutions: maltose, glucose and sucrose.

How might the student establish a control for this experiment.

Answer:

No sugar, just water

# 21 Scientific MethodQuestion:

A properly designed experiment changes only one variable at a time. A student wanted to know which sugar would yield the greatest amount of energy of the cell when metabolized by mitochondria. The student mixed yeasts in three different sugar/water solutions: maltose, glucose and sucrose.List three factors that the student must make sure are kept constant.

Answer:

Amount of waterAmount of sugarAmount of yeastTime given for yeast to use sugar


Question:

A student wants to test the effect of caffeine on the heart rate of Daphnia, a small crustacean.

Describe the experimental group in this experiment.

Answer:

Different amounts of caffeine


Question:The variable that is deliberately changed in an experiment is called the:a) Dependent variableb) Controlled variablec) Hypothetical variabled) Independent variable

Answer:

d) Independent variable


Question:The variable that is the result of the independent variable is called the:a) Dependent variableb) Controlled variablec) Hypothetical variabled) Unidependent variable

Answer:

a) Dependent variable


Question:

Why must an experiment be repeated many times?

Answer:

To make sure your results were not a mistake or fluke.


Question:

Why is it necessary that only one variable be changed in an experiment and that all other variables remain constant?

Answer:

So you know what is causing your experiment result.


Question:

What conclusion can be reached by the data shown in the graph?

Answer:

Photosynthetic activity is highest during June, which is when we have our highest levels of dissolved oxygen in the air.

# 29 Scientific MethodQuestion:

a) What is the independent variable?

b) What is the dependent variable?

Answer:

a) Temperature

b) Breathing rate of fish


Question:

What conclusion can be reached from this data?

Answer: As the temperature goes up, the breathing rate goes up until it reaches 25C (bass) and 20C (catfish), then it goes back down.

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# 1 Scientific Method Question: All scientific investigations begin with: a)Forming a hypothesis b)Conducting an experiment c)Asking a question or observing