PS5-U5 L2: What are sieving and dissolving?

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Date: April 2nd, 2025
Session: 😁🤪
Purpose: distinguish between pure substances (elements and compounds) and mixtures (homogeneous and heterogeneous) by identifying their characteristics and providing real-world examples.

​Instruction:
Develop the Wordbox in your notebook.

• Title: Wordbox (SB page 55)

• Copy words and definitions given in the following wordwall.

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​SB Page 55

• Read the information about Pure Subtances.

• Read the information about Mixtures

Categorize

Options (10)

Definition: Matter with a fixed chemical composition

Types: Includes elements and compounds.

Separation: Cannot be separated by physical means.

Examples: Oxygen (O₂), Gold (Au), Pure water (H₂O), Salt (NaCl)

Properties: Has specific physical and chemical properties (e.g., melting/boiling point)

Definition: Combination of two or more pure substances

Types: Can be homogeneous or heterogeneous.

Separation: Can be separated by physical or chemical processes.

Examples: Air, Salad, Saltwater, Oil and Water mixture

Properties: Properties vary depending on the proportion of components

1. Based on the information read about Pure substances and Mixtures. Classify the following facts. Then, Write this chart in your notebook.

PURE SUBSTANCES

MIXTURES

​SB Page 55

• Exercises 1 and 2.

  • Complete these tasks by playing the following exercises.

Fill in the Blank

Write PS (pure substance) or M (mixture).

1. Hydrogen

Fill in the Blank

Write PS (pure substance) or M (mixture).

2. chocolate milk

Fill in the Blank

Write PS (pure substance) or M (mixture).

3. cookie dough

Fill in the Blank

Write PS (pure substance) or M (mixture).

4. water

Fill in the Blank

Correct the sentences.

1. Compounds are types of mixtures.

.

Fill in the Blank

Correct the sentences.

2. Water is an element.

.

Fill in the Blank

Correct the sentences.

3. A homogeneous mixture cannot be separated.

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