1. Global warming is a problem currently under debate.
2. The conclusion answers the claim and says that copper sulfate is soluble in water.
3. The results of the experiment can be data, observation or measurements obtained when doing the experiment.
4. Observation is when the five senses are used to detect something.
5. A problem can be phrased in terms of questions to be answered.
6. There is a lot of information in to a cure for cancer.
7. The factors that change that affect a problem are called variables.
8. An experiment is designed to test the hypothesis.
Hope this helps!