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Science, types of mixture, types of pure substance, types or compound, types of element, any topic in science grade seven term one for a pre-test

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Course Syllabus

  1. Introduction to Science and Scientific Method
  2. States of Matter and Physical Properties
  3. Pure Substances: Elements
  4. Pure Substances: Compounds
  5. Mixtures: Types and Separation
  6. Energy: Forms and Transformations
  7. Basic Ecology: Ecosystems and Interdependence

Study Notes

Introduction to Science and Scientific Method

Introduction to Science and Scientific Method

TL;DR

Science is a way of understanding the natural world through observation and experimentation, while the scientific method is a systematic process we use to investigate questions. You'll learn how to ask questions, make educated guesses, and test them out. This process helps us find answers and build knowledge.

1. The Mental Model

Think of science as a detective story where you're trying to solve mysteries about how things work in the world. The scientific method is your trusty guidebook, telling you exactly how to investigate each clue to find the truth.

2. The Core Material

Science isn't just a bunch of facts; it's a way of thinking and exploring. It's about being curious, asking "why?" and "how?", and then trying to figure out the answers.

The scientific method is a step-by-step approach scientists use to answer questions and solve problems. It helps make sure their investigations are logical and reliable.

Steps of the Scientific Method

Two female scientists working on an experiment in a laboratory setting.
Photo by Polina Tankilevitch on Pexels

  1. Ask a Question: This is where it all starts! You observe something and wonder about it. For instance, "Why do some plants grow taller than others?"
  2. Do Background Research: Before you experiment, see what others have already learned about your question. This helps you avoid repeating mistakes and gives you ideas.
  3. Formulate a Hypothesis: This is your educated guess or a testable prediction about the answer to your question. It's usually stated as an "If... then..." statement. For example, "If I give a plant more sunlight, then it will grow taller."
  4. Design and Conduct an Experiment: This is where you test your hypothesis. You need to change only one thing (the independent variable) and keep everything else the same (the controlled variables). The thing you measure is the dependent variable.
  5. Analyze Data: After your experiment, you look at the results. What did you observe? Did numbers change? You record and organize your findings.
  6. Draw a Conclusion: Based on your data, you decide if your hypo
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