Cell phones require powerful batteries in order to work effectively. Which activity is best described as an engineering endeavor related to cell-phone batteries?
A. Improving their design to make it easier to recycle them when they are no
longer useful
B. Designing an investigation that will help determine where the materials used
to make them can be found
C. Developing a plan to convince cell-phone companies to use their batteries
Ο Ο
D. Performing experiments to explain how different materials used in batteries
store energy

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted