Separating Mixtures - ESL worksheet by monicavera - Free Printable

Let's solve the quiz step by step, using the vocabulary provided and understanding the scientific concepts involved.

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Quiz: Separating Mixtures

#### Question 1:
The image shows:
- A beaker with water (liquid)
- A dish with salt (solid)
- An arrow pointing to a beaker with a clear solution (salt dissolved in water)

This represents a mixture of water and salt, where salt dissolves in water.

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a. What has happened with the solid material in the mixture?

✔ Answer:
The solid material (salt) has dissolved in the water. This means it became a soluble solid because it mixed completely with the liquid to form a homogeneous solution. The salt particles are now dispersed throughout the water at a molecular level, making it a solution.

> ✔ Vocabulary used: *soluble solids*, *liquids*, *solids*

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b. How can I separate the water from the salt? Describe what happens to the salt and the water during and after the process.

✔ Answer:
You can separate the water from the salt using evaporation. During the process, the mixture is heated. The water, being a liquid, turns into vapor (gas) and escapes into the air, leaving behind the salt as a solid. After the process, the water is no longer present, and the salt remains in the container as a dry solid.

> ✔ Vocabulary used: *evaporation*, *soluble solids*, *liquids*, *solids*

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#### Question 2: When you mix liquids, you can obtain two types of liquids:

This refers to whether liquids mix or not.

A. Miscible liquids – These are liquids that dissolve in each other and form a homogeneous mixture (e.g., alcohol and water).
B. Immiscible liquids – These are liquids that do not dissolve in each other and form separate layers (e.g., oil and water).

So:

A. Miscible liquids
B. Immiscible liquids

Now:

- How can you separate materials in liquid A (miscible liquids)?
By distillation (not listed in vocabulary, but implied). Since they mix completely, you need to use differences in boiling points. However, based on the given vocabulary, you might say:
→ By evaporation (if one evaporates more easily than the other), though distillation is more accurate.

But since "distillation" isn't in the list, perhaps the expected answer uses evaporation or filtration — but filtration doesn’t work for liquids. So likely, the intended answer is:

➤ By evaporation (if one component evaporates faster)

- How can you separate materials in liquid B (immiscible liquids)?
By decanting – pouring off the top layer after letting them settle into layers.

➤ By decanting

> ✔ Vocabulary used: *miscible liquids*, *immiscible liquids*, *decanting*, *evaporation*

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✔ Final Answers:

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1.a.
The solid material (salt) has dissolved in the water, forming a solution. It is a soluble solid.

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1.b.
You can separate the water from the salt using evaporation. During the process, the water turns into vapor and leaves the container, while the salt remains as a solid. After the process, the water is gone, and the salt is left behind.

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2.
A. Miscible liquids
B. Immiscible liquids

- How to separate materials in liquid A? By evaporation
- How to separate materials in liquid B? By decanting

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🔍 Summary of Vocabulary Used:

- Solids – salt
- Liquids – water
- Soluble solids – salt dissolves in water
- Filtration – not applicable here (no undissolved solids)
- Decanting – used for immiscible liquids
- Evaporation – used to separate salt from water
- Immiscible liquids – e.g., oil and water
- Miscible liquids – e.g., alcohol and water

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✔ This answers all questions clearly and uses required vocabulary appropriately.