4th Grade Science: Part 1 Lessons 3-4

What are scientific methods?

• Observations and facts gained from experiments
• A possible answer to your question
• Organized ways to answer questions and solve problems

What is a hypothesis?

• Observations and facts gained from experiments
• A possible answer to your question
• The thing you change in an experiment

What are independent variables?

• Observations and facts gained from experiments
• The thing you measure and observe in an experiment
• The thing you change in an experiment

What are dependent variables?

• Observations and facts gained from experiments
• The thing you measure and observe in an experiment
• The thing you keep the same in an experiment

What are controlled variables?

• Observations and facts gained from experiments
• The things you keep the same in an experiment
• The results gathered in an investigation

What is evidence in scientific experiments?

• Observations and facts gained from experiments
• A possible answer to your question
• The thing you change in an experiment

What is the first step in the scientific method?

• State your hypothesis
• Collect and record your data
• Ask a question about something you observe

How should you state your hypothesis?

• Write it as an if/then/because statement
• Make a plan to test your hypothesis
• Identify and control variables

What should you do to ensure a fair test in an experiment?

• Choose 1 variable to change
• State your conclusion
• Collect and record your data

Why is it important to repeat each trial 3 times in an experiment?

• To make the experiment more fun
• To save time
• To get more reliable results