Unit 1 Study Questions – How to Science

1. Give examples of lab safety practices.

• Wear goggles (protect eyes), tie back long hair (avoid catching fire/chemicals), no eating/drinking (prevent contamination).

• Wear sandals, leave hair loose, eat snacks in the lab.

• Ignore safety signs, use broken equipment, drink chemicals.

• Wear jewelry, use mobile phones, taste unknown substances.

List three items or actions that help ensure safety in the lab.

• Goggles, safety shield, keeping distance from demo, tying back hair.

• Eating food, running, using broken glassware.

• Wearing sandals, leaving spills, ignoring instructions.

• Not wearing goggles, loose hair, crowding around experiments.

Why is eating or drinking in the lab dangerous?

• Food could be contaminated by chemicals, which is dangerous.

• It helps you focus better on experiments.

• It keeps the lab cleaner.

• It improves the taste of food.

Define hypothesis, theory, and law in science.

• Hypothesis: testable prediction. Theory: well-supported explanation of why things happen. Law: describes what happens consistently in nature.

• Hypothesis: proven fact. Theory: guess. Law: untested idea.

• Hypothesis: random idea. Theory: unchangeable fact. Law: explanation of why things happen.

• Hypothesis: law of nature. Theory: testable prediction. Law: well-supported explanation.

Give an example of a hypothesis, a theory, and a law.

• Hypothesis: If fertilizer is added, plants will grow taller. Theory: Theory of Plate Tectonics. Law: Law of Gravity.

• Hypothesis: The sun rises in the west. Theory: Flat Earth Theory. Law: Law of Perpetual Motion.

• Hypothesis: Water boils at 50°C. Theory: Theory of Spontaneous Generation. Law: Law of Unicorns.

• Hypothesis: If sugar is removed, water will freeze at 0°C. Theory: Theory of Magic. Law: Law of Invisibility.

How do scientific theories and laws differ in what they explain?

• They answer different questions. Theories explain WHY; laws describe WHAT happens.

• They answer the same questions. Both explain WHY things happen.

• Theories describe WHAT happens; laws explain WHY.

• There is no difference; both are just guesses.

Why might scientific theories change over time?

• Because new evidence is discovered.

• Because scientists get bored.

• Because scientific theories are always wrong.

• Because people vote on them.

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List the steps of the science process.

• Ask a question, form a hypothesis, plan/test experiment, collect/analyze data, draw conclusions, share results.

• Start with a conclusion, collect data, form a hypothesis, share results, plan experiment.

• Ask a question, skip hypothesis, collect data, share results, draw conclusions.

• Form a hypothesis, collect data, plan experiment, share results, draw conclusions.

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Why is it important to repeat experiments?

• To check for errors and increase reliability.

• To make the experiment more expensive.

• To confuse the results.

• To reduce the number of observations.

Give an example of a scientific question that can be tested by an experiment.

• Does the amount of sunlight affect how fast plants grow?

• What is the capital of France?

• Who wrote the novel 'Moby Dick'?

• How many continents are there on Earth?

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