A shopping mall wanted to determine whether the more expensive tough stuff floor wax was better than the cheaper steel seal floor wax at protecting its floor tiles against scratches. One liter of each brand of floor wax was applied to test sections of the main hall of the mall. The test sections were all the same size and were covered with the same kind of tiles. After 3 weeks the number of scratches in each of the test sections was counted to observe the wax's effectiveness

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

What are the result of when individual components in an organism interact with others to create noval stucture and function called

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.