10.1 Scientific Inquiry & Characteristics of Science

What Is Scientific Inquiry?

Scientific inquiry is the process scientists use to ask questions about the natural world and find answers through evidence. In a Georgia P-5 classroom, inquiry is not a rigid recipe — it is a flexible cycle that helps children think like scientists. The GACE framework expects you to know both the skills of investigation and the mindset behind them: curiosity, skepticism, reliance on evidence, and willingness to revise ideas when new data appear.

The Scientific Method

The elementary scientific method is commonly taught as six repeating steps. Students should understand that scientists often loop back: a conclusion raises a new question, which starts the cycle again.

Hypothesis, Theory, and Law

These three words are commonly confused on the GACE:

• Hypothesis — a testable prediction about the outcome of one investigation. It can be supported or not supported by the data; it is never "proven" by a single experiment.
• Scientific theory — a well-supported explanation of many related observations and experiments. The germ theory of disease and the theory of evolution explain huge bodies of evidence; they are not guesses.
• Scientific law — a statement (often mathematical) describing what happens under specific conditions, not why. Newton's law of gravitation and the law of conservation of mass describe patterns so reliably that they can be used to predict outcomes.

A theory does not "grow up" to become a law. They answer different questions: theories explain; laws describe.

Variables and the Fair Test

A fair test changes only one variable at a time so the result can be attributed to that change alone.

• Independent variable — what the investigator changes on purpose (e.g., amount of sunlight).
• Dependent variable — what is measured, the outcome (e.g., amount of water evaporated).
• Controlled variables — everything kept the same to avoid confusing the result (e.g., same dish size, same starting water volume, same room temperature).

Repeatability matters: a clear, detailed procedure lets another classmate repeat the investigation and get a similar result, which strengthens the conclusion.

Measurement Tools

Choosing the correct tool is a GACE staple. Match the property to the instrument:

Students should learn to read meniscus at eye level in a graduated cylinder and to record units with every number — "25 mL," not just "25."

Data Collection and Representation

Elementary students collect data with tally charts, tables, and drawings, then represent it with bar graphs, picture graphs, and line plots. By grade 5 they begin to interpret simple line graphs that show change over time (for example, plant height across two weeks). Good data representation chooses a graph type that fits the question: bar graphs compare categories; line graphs show change over time.

Science Safety

The elementary classroom safety rules every teacher must enforce:

1. Wear goggles whenever there is a risk of splash, flying bits, or dust.
2. Wear gloves when handling organisms, soils, or anything that might irritate skin.
3. Never taste any material in a science activity, even food, unless the teacher explicitly approves it.
4. Do not smell materials directly; waft gently if a smell check is needed.
5. Tie back long hair, secure loose sleeves, and never reach across a flame or hot plate.
6. Wash hands with soap and water after every investigation, especially before eating.

A teacher should always model these behaviors, review the safety plan before each activity, and keep a first-aid kit accessible.

Classifying Objects by Observable Properties

Classification is an inquiry skill used across every P-5 grade. Students sort objects by observable properties such as:

• Hardness — can be scratched by a fingernail, a copper penny, or a steel nail (the Mohs scale extends this idea in upper grades).
• Texture — rough, smooth, bumpy, slippery.
• Color, luster, size, shape, magnetism, and whether the object floats or sinks.

A good classification activity uses a dichotomous key: at each step, choose between two observable traits (for example, "leaves with rounded edges" vs. "leaves with pointed edges") until every object has its own group.

Models, Systems, Scale, and Change

The GACE framework asks teachers to use four crosscutting ideas:

• Models are simpler representations of complex things. A physical model (a clay volcano) can be touched; a conceptual model (a food-chain diagram) shows relationships; a mathematical model (a formula for speed = distance ÷ time) uses math.
• Systems are groups of parts working together. A terrarium is a system: soil, plants, water, and light interact.
• Scale compares sizes — a model cell is thousands of times larger than a real cell; Earth is much smaller than the Sun.
• Change can be fast (a volcano erupting) or slow (a canyon forming over millions of years).

Communicating Scientific Ideas

Students communicate science by keeping science notebooks with dated entries, labeled drawings, data tables, and written conclusions. They share findings in science talks, where classmates ask questions and offer counter-evidence. Communication is part of the nature of science: results that cannot be shared and checked by others do not become part of scientific knowledge.

Nature of Science as a Way of Knowing

Science is one way of knowing about the natural world, alongside other ways such as art, religion, and personal experience. What makes science distinctive is its reliance on evidence, testable ideas, peer review, and the willingness to revise explanations when new evidence appears. A teacher who helps children distinguish "what science can investigate" (natural, observable, measurable phenomena) from "what it cannot" (matters of faith or personal values) is teaching the nature of science well.