Which of these is an example of chemical energy being converted to mechanical energy? eating breakfast then walking to the bus.
turning on the radio
piling wood and then making a fire

The ph is the a.independent variable b.the dependent variable c.control group

Which is a substance that can be separated by physical means and is not the same throughout

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