Grade 7 Integrated Science · Strand 2: Mixtures, Elements & Compounds · Mixtures
Introduction to Mixtures and States of Matter
A short Grade 7 Integrated Science lesson for the CBE curriculum, part of Mixtures, Elements & Compounds: Mixtures. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. Which of the following is classified scientifically as a pure substance?
- A. Bronze
- B. Natural borehole water
- C. Clean air
- D. Distilled water
2. Cooking oil is poured into water and the two form separate layers. What type of mixture is this?
- A. Solid-solid
- B. Liquid-liquid
- C. Solid-liquid
- D. Gas-gas
3. Which statement correctly describes the particles in a gas?
- A. They are tightly packed in fixed positions
- B. They are close together but slide past one another
- C. They are far apart and move rapidly in all directions
- D. They vibrate about fixed positions and cannot be compressed
4. Clean dry air is made up of 78% nitrogen and 21% oxygen by volume, with the rest being other gases. What percentage of air is made up of other gases?
Type your answer (in %) in the lesson.
5. What name is given to an individual part or ingredient of a mixture?
Type your answer in the lesson.
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