1What was the objective of the air-volume experiment, and what did it show?
2Why can air be squeezed into a smaller space, when water cannot?
3Explain, using the candle-and-glass example, how we know that air contains oxygen.
4Why does a lantern have small holes at its top and bottom, even though the flame is covered by glass?
5What happens to the salt during distillation? Why does it stay behind while the water leaves?
6Why must the procedure of the distillation experiment mention that cold water flows around the condenser?
7Look at the three sample reports in this topic. Which of the ten parts are missing from all three, and why does that matter?
8Choose one of the three sample reports and explain, in your own words, why its conclusion follows from its observation.