Hypothesis (4 points)
Record your hypothesis as an “if, then” statement for the rate of dissolving the compounds:

Record your hypothesis as an “if, then” statement for the boiling point of the compounds:

Variables (6 points)
Independent Variable:

Dependent Variable:

Controlled Variables:

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

Which sentence best expresses the differing opinions of these two book reviews?

The body is protected against harmful flu viruses by