Answer the question below:   When we have a lot of greenhouse gases in the air what happens to the temperature increases or stays the same?    Assuming that:  As greenhouse gases increase, changes will be more extreme.
increases

Answer the question below:   If Mona fills up a cup with water and places that water into the oven, what happens to the density of the water as it heats up increases or decreases?    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.
decreases

Answer the question below:   Jim is designing a new car and playing around with different materials. If he were to decrease the weight of the vehicle, what would happen to the fuel efficiency of that vehicle? It would increase or decrease?    Assuming that:  Lighter, more streamlined vehicles need less energy.
increase