In this experiment, the was intentionally manipulated. It is the independent variable. The dependent variables that were measured were the .
The dependent variables that were measured were the .
Was there a measureable difference in the number of grass blades between the control group and the experimental group at the end of three weeks? ✔ yesno
In the control group, how did the number of grass blades change over the three week period? In the experimental group, how did the number of grass blades change over the three week period? Was there a measureable difference in the number of grass blades between the control group and the experimental group at the end of three weeks?
What conclusions can be drawn about the decrease in the number of grass blades in both the experimental and control groups?
The number of grass blades decreases over time in both groups due to crowding and competition from the new sunflower and birch tree sprouts. Which of the following did you include in your answer? Check any that apply.crowding from new sunflower and birch tree sproutscompetition from new sunflower and birch tree sprouts
What conclusions can be drawn about the greater number of sunflower sprouts compared to the number of birch tree sprouts in both the experimental and control groups?
The number of sunflower sprouts is greater than the number of birch tree sprouts in both groups because sunflowers have a faster growth rate than birch trees. Which of the following did you include in your answer? Check any that apply.sunflowers have a faster growth rate than birch treesbirch trees have a slower growth rate than sunflowers
What effect does adding nutrients have on the total number and average height of sunflowers and birch trees?
Adding nutrients to the soil allowed more sunflowers and more birch trees to sprout over the three-week period. Also, by adding nutrients, the sunflowers and birch trees that sprouted were able to grow taller than those without added nutrients. Which of the following did you include in your answer? Check any that apply.Adding nutrients to the soil allowed more sunflowers and more birch trees to sprout over the three-week period.By adding nutrients, the sunflowers and birch trees that sprouted were able togrow taller than those without added nutrients.
Which procedures were followed in this lab to decrease experimental error? Check all that apply.
In the experimental group, how did the number of grass blades change over the three week period? increased✔ decreasedstayed the same
The number of birch tree sprouts in the experimental group is ✔ greater thanless thanequal to the control group.
Which of the following did you include in your answer? Check any that apply.
Which of the following did you include in your answer? Check any that apply.
Which type of plant grew the slowest and is therefore the shortest? grasssunflowers✔ birch trees
Which of the following did you include in your answer? Check any that apply.
If a scientist returned to this forest two years later, what species might she expect to find dominating the habitat? fast-growing weeds/flowers✔ slow-growing hardwoods
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