Solar power is expensive, but as demand increases technology improves and costs decrease. Ryan noticed that a unpopular solar panel is more or less expensive than it was?
more

The closer to pH 14, the more strongly basic the solution. If we tested a solution and it was 12 on the pH scale it would be acidic or basic?
basic

Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths. Mona is excavating a deep tunnel as part of an exploratory committee. As she travels upwards back from the Earth, what can she expect will happen to the temperature increase or decrease?
decrease