Q: Answer the question below:   When people forgot how to farm the population decreased or increased?    Assuming that:  More recently, the death rate has fallen because of the availability of more food and medical advances.
A: decreased


Q: Answer the question below:   Jim puts his water in the oven for later. The molecules in the liquid speed up or slow down?    Assuming that:  When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
A: speed up


Q: Answer the question below:   If Milo wants to make his water saltier and begins adding salt to the glass, what happens to the density of the glass of water decreases or increases?    Assuming that:  If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser.
A: increases


Q: Answer the question below:   Waves can be made by wind, on a windy day would we expect to have larger waves or smaller waves?    Assuming that:  The stronger the winds are blowing, the larger the waves are and the more energy they have.
A: larger waves