NSES Content Standard E  Science and Technology: Understanding about science and technology  Grades K-4, page 138  People have always had questions about their world. Science is one way of answering questions and explaining the natural world.

 
Benchmark 1A The Nature of Science: The Scientific World View
Grades 6-8, page 7
Some matters cannot be examined usefully in a scientific way. Among them are matters that by their nature cannot be tested objectively and those that are essentially matters of morality. Science can sometimes be used to inform ethical decisions by identifying the likely consequences of particular actions but cannot be used to establish that some action is either moral or immoral.

Benchmark 1B The Nature of Science: Scientific Inquiry
Grades K-2, page 10
People can often learn about things around them by just observing those things carefully, but sometimes they can learn more by doing something to the things and noting what happens.

Benchmark 1B The Nature of Science: Scientific Inquiry
Grades 3-5, page 11
Scientific investigations may take many different forms, including observing what things are like or what is happening somewhere, collecting specimens for analysis, and doing experiments. Investigations can focus on physical, biological, and social questions.