science test

what is the order of the scientific method

1. make observations 2. ask a question 3. form a hypothesis 4. test the hypothesis 5. draw conclusions 6. communicate results

summary for chapter two

• An experiment is a special type of scientific investigation that is performed under controlled conditions,usually in a laboratory. • An experiment generally tests how one variable is affected by another. • The sample size in an experiment directly affects the interpretation of the results. • Repetition is the repeating of an experiment, validating the results.

summary for chapter one

• At the heart of science is the scientific investigation, which is done by following the scientific method. A scientific investigation is a plan for asking questions and testing possible answers. • A scientific investigation typically begins with observations. Observations often lead to questions. • A hypothesis is a possible logical answer to a scientific question, based on scientific knowledge. • A prediction is a statement that tells what will happen under certain conditions. • Evidence is any type of data that may either agree or disagree with a prediction, so it may either support or disprove a hypothesis. Conclusions may be formed from evidence. • The last step in a scientific investigation is the communication of results with others.

summary for chapter 3

• With repeated testing, some hypotheses may eventually become scientific theories. A scientific theory is a broad explanation for events that is widely accepted as true. • Evolution is a change species over time. Evolution occurs by natural selection. • The cell theory states that all living things are made up of cells, and living cells always come from other living cells. • The germ theory proposes that microorganisms are the cause of many diseases.