Basic 2 · Science · Materials
Solid–Solid Mixtures
In this topic you will make mixtures of two solids and learn that no new substance is formed.
By the end of these notes you should be able to:
- Explain what a solid–solid mixture is
- Make solid–solid mixtures
- Show that the parts keep their own properties
What you already know
- Mixtures (Basic 1)
Copy everything that has a blue line on its left into your notebook. The other parts are for reading.
- Strand
- Diversity of Matter
- Sub-strand
- Materials
- Indicator
- B2.1.2.3.1 – Describe a solid–solid mixture and explain how to separate the components
Introduction
Mother mixes rice and beans to cook waakye. The rice is still rice and the beans are still beans. They are just mixed.
1. What is a Solid–Solid Mixture?
Solid–solid mixture: Two or more solids mixed together.
| Mixture | Made of |
|---|---|
| rice and beans | two grains |
| sand and gari | two powders |
| maize and beans | two seeds |
| stones and sand | rocks and grains |
2. No New Substance
In a mixture, nothing new is made.
Each part keeps its own colour, shape and size.
That is why we can separate a mixture again.
New words
- mixture
- Two or more things mixed together.
- substance
- Any kind of matter.
- grain
- A small hard seed or piece.
- component
- One part of a mixture.
Summary
- A solid–solid mixture is two or more solids mixed together.
- No new substance is formed in a mixture.
- Each part keeps its own properties.
Class activity: Mix and Look
- Mix maize grains and beans in a calabash bowl.
- Look closely. Can you still see each one?
- Talk about whether anything new was made.
You need: Maize grains, Beans, Locally woven sieve, Calabash bowls
Exercises
Answer in your exercise book first, then check your answers.
1. Which is a solid–solid mixture?
- A. Rice and beans
- B. Water and salt
- C. Air
- D. Milk
Show answer
Answer: Rice and beansBoth are solids.2. What happens in a mixture?
- A. No new substance forms
- B. A new food forms
- C. Everything disappears
- D. It turns into water
Show answer
Answer: No new substance formsThe parts stay the same.3. In maize and beans, we can still see the beans.
- A. True
- B. False
Show answer
Answer: TrueThe parts keep their properties.4. A mixture always makes a new substance.
- A. True
- B. False
Show answer
Answer: FalseMixtures do not make new substances.5. One part of a mixture is a ______.
Show answer
Answer: componentComponents are the parts.6. Name two solid–solid mixtures from home.
Show answer
Answer: E.g. rice and beans, gari and sugar.Both parts are solids.
Homework
- Help prepare a meal with a solid–solid mixture. Name the parts.