Answer the question below:   When a child has a lot of energy they will move around slower or faster?    Assuming that:  The particles in matter are always moving. The more energy they have, the faster they move.
faster

Answer the question below:   Mike wants his voice to travel slowly, so he will speak in a room that is colder or warmer?    Assuming that:  For a given medium such as air, sound has a slower speed at lower temperatures.
colder

Answer the question below:   Gerald laid down many rock layers. The layers on the bottom level were likely laid first or last?    Assuming that:  Lower rock layers were laid down earlier, so they are assumed to contain older fossils.
first