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ES Unit 1 Concept 1

ES Unit 1 Test

QuestionAnswer
All Scientific investigations begin with asking a question or observing a problem
The next step after making an observation or asking a question in a scientific investigation is to form a hypothesis
After forming a hypothesis the next step in a scientific investigation is conduct a controlled experiment
After conducting an experiment, the next step in a scientific investigation is to analyze the data
After analyzing the data, the next step in a scientific investigation is to form a conclusion
The final step in a scientific investigation after a conclusion has been form is to report your result in a publication like a peer-reviewed journal
Sometimes in trying to form a hypothesis or design a procedure you will need to do this addition step to narrow you hypothesis do background research
Data that is numerical such as the length of growing root tips quantitative
Data that is descriptive rather than numerical such as the color of blooms on a rose plant qualitative
A "testable" statement that is a possible answer (or prediction) to the question or problem that can either be supported or unsupported by the data collected in an experiment hypothesis
"I predict that the rate of the enzyme reaction will be highest at a temperature of 40 degrees Celsius." This is an example of which part of a scientific investigation. hypothesis
How is it determined if a hypothesis is correct or incorrect? by an experiment
How many variables are changed at a time in a controlled experiment? only one
What two groups should every experiment have? control group and experimental group
Which group in an experiment serves as a comparison-it shows what might happen in the absence of the independent variable? control group
Which group shows the effect of the one variable that is being tested? experimental group
The variable that is deliberately changed in an experiment independent variable
The variable that is the result of the independent variable; it's the data, what is measured or counted, or observed dependent variable
Catalase is an enzyme that speeds up the breakdown of hydrogen peroxide in cells. During this reaction oxygen is given off. A scientist designs an experiment to determine how much oxygen is given off when varying concentrations are used. What is the independent variable? concentration of the catalase
Catalase is an enzyme that speeds up the breakdown of hydrogen peroxide in cells. During this reaction, oxygen is given off. A scientist designs an experiment to determine how much oxygen is given off when varying concentrations of catalase are used. What is the dependent variable? amount of oxygen given off
A student makes the following statement. "I predict that sucrose will provide the highest rate of cellular respiration." What is this statement an example of? hypothesis
A student wanted to know which type of sugar would yield the greatest amount of energy for the cell when metabolized during cellular respiration by the mitochondria. The student mixed yeasts in three different sugar solutions: maltose, glucose, and sucrose. The three sets of yeasts were monitored to determine which sugar type yielded the most energy. What variable would the type of sugar given to the yeast be? independent variable
A student wanted to know which type of sugar would yield the greatest amount of energy for the cell when metabolized during cellular respiration by the mitochondria. The student mixed yeasts in three different sugar solutions: maltose, glucose, and sucrose. The three sets of yeasts were monitored to determine which sugar type yielded the most energy. Which variable would the amount of energy obtained from a particular sugar during cellular respiration be? dependent variable
A student wanted to know which type of sugar would yield the greatest amount of energy for the cell when metabolized during cellular respiration by the mitochondria. The student mixed yeasts in three different sugar solutions: maltose, glucose, and sucrose. The three sets of yeasts were monitored to determine which sugar type yielded the most energy. The three groups given maltose, glucose, or sucrose would be which type of group? experimental
A student wanted to know which type of sugar would yield the greatest amount of energy for the cell when metabolized during cellular respiration by the mitochondria. The student mixed yeasts in three different sugar solutions: maltose, glucose, and sucrose. The three sets of yeasts were monitored to determine which sugar type yielded the most energy. A group consisting of yeast added to water with no sugars added is this type of group? control
A student wanted to know which type of sugar would yield the greatest amount of energy for the cell when metabolized during cellular respiration by the mitochondria. The student mixed yeasts in three different sugar solutions: maltose, glucose, and sucrose. The three sets of yeasts were monitored to determine which sugar type yielded the most energy. When the student designs the experiment, the decide that the same amount of sugar, water, yeast as well as the temp will remain the same. These are? controlled variables or constants
A student wants to test the effect of different amounts of caffeine on the heart rate of Daphnia, a small crustacean. Which group consist of organisms that are given varying amounts of caffeine? experimental group
A student wants to test the effect of different amounts of caffeine on the heart rate of Daphnia, a small crustacean. Which group would consist of Daphnia that receives no caffeine? control group
A student wants to test the effect of different amounts of caffeine on the heart rate of Daphnia, a small crustacean. What is the independent variable? the quantity of caffeine
A student wants to teat the effect of the different amounts of caffeine on the heart rate of Daphnia, a small crustacean. What is the dependent variable? the heart rate of Daphnia
An experiment is conducted to determine the glucose production during photosynthesis when leaves are exposed to different wavelengths of light. What is the independent variable? different wavelengths of light
An experiment is conducted to determine the glucose production during photosynthesis when leaves are exposed to different wavelengths of light. What is the dependent variable? the amount of glucose produced at each wavelength of light
Repeating an experiment many times makes our results more? valid
Why should only one variable at a time be changed and all other variables remain constant? If more than one variable is changed at a time, it cannot be determined which variable is responsible for the observed results.
An experiment is carried out to determine if the boiling point of distilled water is affected by the addition of different types of solutes. Describe a control group for this experiment. water with no solute added
A student is designing an experiment to see how temperature changes affect the volumes of three different gases. Write a hypothesis for the experiment. I predict that the volume of each gas will increase as the temperature increases. (This is just one possible answer).
A scientist is designing an experiment to see how temperature changes affect the volumes of three different gases. What is the dependent variable? the change in the variable of the gas
A scientist is designing an experiment to see how temperature changes affect the volumes of three different gases. What is the dependent variable? the temperatures
When graphing, which variable is plotted on the x axis (horizonal axis)? independent variable
When graphing, which variable is plotted on the y axis (vertical axis? dependent variable
 



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