Intelligence is what you know. Creativity is like your imagination or what you can make or do. <span />
They had cattle because of the hide and tallow trade. also they were used for food products like meat and dairy if it was a dairy cow.
When neolithic people are building their houses they normally creates stores for their food, these stores are built into the ground of their houses and they made pits for cooking their food.<span />
In order to build a hypothesis, Joan should take an educated guess at what the effect of adding salt to the water will be on the water's boiling point. For example, the hypothesis may be,
"The boiling point will increase".
This hypothesis is one that can be verified or rejected via experimentation. The next step for Joan would be to set up an experiment to test this hypothesis.