Fact 1: Increasing heat causes thermal expansion. Fact 2: Thermal expansion can cause serious problems. Given the two facts above, increasing heat causes what?
Select from the following.
1). lower temperatures.
2). chemical reaction.
3). cooler weather.
4). serious problems.
5). Evaporation.
6). global warming.
7). kinetic energy.
8). refrigeration.
Answer:
4).