Question

6 multiple choice 2 points
identify the statement below:
the bacteria are round.
conclusion
hypothesis
qualitative observation
quantitative observation
7 multiple choice 2 points
lydia works in a flower shop after school. she notices that the hydrangeas in container 1 have pink blossoms, while the hydrangeas in container 2 have blue blossoms. she makes sure they all receive the same amount of light and water. her boss tells her that the flowers were all grown from the same seed variety. lydia discovers, after testing the soil, that although the same type of soil was used, the soil in container 1 has a ph of 6.0, and the soil in container 2 has a ph of 5.0. which of the following would be the independent variable in this experiment?
color of hydrangea blossom
ph of soil
container 2
amount of water each plant received
8 multiple choice 2 points
the part of an experiment that is being measured would be the
question
dependent variable
controlled variable
independent variable

Explanation:

• Question 6: A qualitative observation describes characteristics (like shape - round in this case). A conclusion is a final judgment, a hypothesis is a proposed explanation, and a quantitative observation involves numbers.
• Question 7: The independent variable is what is changed in an experiment. Here, the pH of the soil is changed (6.0 vs 5.0), while other factors (light, water, seed variety) are controlled. The color of the blossom is the dependent variable (changes based on soil pH), container 2 is just a label, and the amount of water is controlled.
• Question 8: The dependent variable is what is measured in an experiment. The question is what is being asked, the controlled variable is kept the same, and the independent variable is what is changed.

Answer:

• Question 6: qualitative observation
• Question 7: pH of soil
• Question 8: dependent variable