Dana measured the mass of 20 soil samples for a gardening study. After measuring the first 10, she realized she had forgotten to zero the balance. She did that and then measured the other 10 samples.
A student wants to determine how his classmates feel about school. He does a survey away from school so all participants will be willing to answer freely. In several cases, younger siblings of his classmates are present, so he lets them take the survey too. He surveys a total of 50 students. Has he done a well-designed, controlled experiment? Select the correct answer.
From the following list, choose the three components required for a good scientific argument.
Use the data set on the right to answer each of the following questions.What is the mean?
Answer these two questions about the bacteria population shown in the graph. What is the trend in population size shown by the population in this graph?
Which of the following statements describe how technology and research changed the understanding of genetics? Select all that apply.
What is the range?
Assuming that conditions for this bacterial population do not change, what would be the expected population after 6.5 hours?
How did technology and research advances further the understanding of cells? Select all that apply.
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