Grade 7 Science Quarterly Exam

What is the first step of the scientific method?

• Experiment

• Observation

• Hypothesis

• Conclusion

A hypothesis is:

• A proven fact

• A testable prediction

• The final result of an experiment

• A summary of data

Which of the following is NOT part of the scientific method?

• Asking a question

• Forming a hypothesis

• Ignoring data

• Conducting an experiment

What is the purpose of a control group in an experiment?

• To provide a standard for comparison

• To change the variables

• To ensure the experiment is fun

• To gather more data

After analyzing data, what is the next step in the scientific method?

• Conclusion

• Observation

• Experiment

• Question

Which of the following best describes an experiment?

• A random guess

• A controlled test to investigate a hypothesis

• A summary of previous research

• A theoretical prediction

What is an element?

• A pure substance made of two or more different atoms

• A substance that cannot be broken down into simpler substances

• A mixture of two or more substances

• A chemical reaction

Which of the following is a compound?

• Oxygen (O₂)

• Hydrogen (H₂)

• Water (H₂O)

• Sodium (Na)

What is the smallest unit of an element?

• Molecule

• Atom

• Ion

• Compound

Which of the following is a characteristic of compounds?

• They are always solid

• They have properties different from the elements that make them up

• They can be separated by physical means

• They contain only one type of atom