People want to know why things happen. It’s important to know a cause. For example, once you know what has made someone sick, you may be able to figure out how to make that person well.

As you read the next stories, try to find the cause of what is happening.

Ken left his new baseball glove outside. That night, it was cold and rained hard. The next morning, Ken went to get his glove. It was still wet. So Ken put it out in the sun to dry. Later in the afternoon, he found that his glove was dry. But it did not feel right. It had been soft. Now it was hard and rough.

What made Ken’s baseball glove feel rough?