Metals, for example Cesium and Francium
Answer:
By designing new technology that would prove new information
Explanation:
H2O became a vapor when heated because thats the only one that can go back to its normal state, which is what a physical change is.
<span>A scientific question is like a hypothesis. It's the question that you're trying to answer throughout the experiment. So, a scientific question in this case could be: If the car has bigger wheels, will it travel faster? This is something you can test in the experiment, by having different cars with different sized wheels. In this way, you can track how fast each car goes, and determine whether or not the wheel size increases speed, decreases speed, or has no effect on speed.</span>
