Mixture : Definition, Examples and Reasons for Mixtures

Subject: Basic Science and Technology

Class: Pry 4

Topic: Mixture : Definition, Examples and Reasons for Mixtures

Term : Second Term

Week : Week 5

Behavioural Objectives :

By the end of the lesson, pupils should
be able to:

• explain the meaning of mixture;
• enumerate examples of common
  mixtures;
• discuss other examples of mixtures.
• Explain how mixtures form new things
  and materials.

Learning Activities

• Class discusses the meaning of
  mixture.
• Class brainstorms on the common
  examples of mixtures.
• Pupils in small groups discuss other
  examples of mixtures and a
  volunteer of each group share their
  ideas with the larger class.
• Pupils create new things by mixing different substances.

Embedded Core Skills

• Critical thinking and problem solving
• Communication and Collaboration
• Leadership skills and Personal Development
• Creativity and Imagination

Audio Visual Resource

• Cereal
• MILK
• Flour
• Butter
• Cream
• Sugar
• Coffee
• Tea
• Gravel
• Water
• Water colour etc

Content

Mixture : Definition, Examples and Reasons for Mixtures

A mixture is when you take two or more things and mix them together to make something new. For example, if you mix red and blue paint together, you get a new color, purple.

Here are some more examples of mixtures:

• Lemonade: Lemonade is made by mixing water, sugar, and lemon juice together.
• Salad: A salad is a mixture of different vegetables like lettuce, tomatoes, and cucumbers.
• Trail mix: Trail mix is a mixture of different foods like nuts, seeds, and dried fruit.

There are lots of reasons why people make mixtures. Sometimes they do it to create something new and exciting, like when you mix different colors of paint. Other times they do it to improve something, like when you add sugar to lemon juice to make it taste better.

Mixtures can also be useful in science experiments. Scientists might mix different chemicals together to see what happens, or they might mix different types of soil to see which plants grow best.

So, a mixture is when you take two or more things and mix them together to make something new. And as you can see, there are many different reasons why people make Mixtures!

Evaluation

1. What is a mixture? a) When you take two or more things and mix them together to make something new b) When you take two or more things and keep them separate c) When you take one thing and break it into smaller pieces
2. Which of the following is an example of a mixture? a) A glass of water b) A piece of bread c) A pencil
3. Why do people make mixtures? a) To create something new and exciting b) To improve something c) Both a and b
4. What is an example of a mixture that is used in cooking? a) Lemonade b) Salad c) Cake batter
5. What happens when you mix red and blue paint together? a) You get a new color, purple b) You get a new color, green c) You get a new color, orange
6. What is an example of a mixture that is used in gardening? a) Soil b) Water c) Sunlight
7. Which of the following is NOT a reason why people make mixtures? a) To make things worse b) To create something new and exciting c) To improve something
8. What is an example of a mixture that is used in cleaning? a) Water b) Bleach c) A vacuum cleaner
9. What is an example of a mixture that is used in medicine? a) Salt water b) Chocolate milk c) Soap
10. Which of the following is an example of a mixture that is used in crafting? a) Glue b) A pencil c) A ruler.
    .

Examples of common Mixtures :

• Concrete: A mixture of cement, sand, and gravel.
• Air: A mixture of gases like nitrogen, oxygen, and carbon dioxide.
• Saltwater: A mixture of salt and water.
• Paint: A mixture of pigment, binder, and solvent.
• Salad dressing: A mixture of oil, vinegar, and herbs.
• Perfume: A mixture of essential oils and alcohol.
• Trail mix: A mixture of nuts, seeds, and dried fruit.
• Soup: A mixture of vegetables, meat or beans, and broth.
• Gasoline: A mixture of different hydrocarbons.
• Ink: A mixture of pigment, water, and a binder.

There are many mixtures all around us, and they are used for many different purposes in our daily lives! 

Evaluation

1. What is an example of a mixture used in cooking? a) Cement b) Salad dressing c) Gasoline
2. What is an example of a mixture used in painting? a) Flour b) Saltwater c) Paint
3. What is an example of a mixture used in gardening? a) Cereal b) Gravel c) Ink
4. What is an example of a mixture used in personal care products? a) Trail mix b) Perfume c) Concrete
5. What is an example of a mixture used in cleaning? a) Tea b) Ink c) Detergent
6. What is an example of a mixture used in construction? a) Milk b) Flour c) Concrete
7. What is an example of a mixture used in science experiments? a) Sugar b) Watercolor paint c) Coffee
8. What is an example of a mixture used in transportation? a) Ink b) Gasoline c) Salad dressing
9. What is an example of a mixture used in art? a) Flour b) Watercolor paint c) Tea
10. What is an example of a mixture used in music? a) Cement b) Trail mix c) None of the above.

Reasons for Mixtures

1. To Create Something New and Exciting: One of the main reasons people create mixtures is to make something new and exciting. For example, mixing different colors of paint together can create a brand new color that you’ve never seen before.
2. To Improve Something: Another reason people create mixtures is to improve something. For example, adding sugar to lemon juice makes it taste better, or adding cream to coffee makes it richer and smoother.
3. To Achieve a Specific Function: Sometimes, mixtures are created to achieve a specific function. For example, gasoline is a mixture of different hydrocarbons that is designed to power vehicles and machinery.
4. To Explore Scientific Concepts: Mixtures are used in science experiments to explore different concepts. For example, mixing different chemicals together can create new compounds and reactions.
5. To Meet Specific Industry Needs: Many industries, such as construction and manufacturing, use mixtures to meet specific needs. For example, concrete is a mixture of cement, sand, and gravel that is used in construction projects.
6. To Improve the Nutritional Value of Food: Mixtures can also be used to improve the nutritional value of food. For example, mixing different grains and seeds together can create a healthy and tasty breakfast cereal.
7. To Improve the Texture and Consistency of Food: Mixtures can also be used to improve the texture and consistency of food. For example, mixing flour and butter together can create a smooth and delicious pastry dough.
8. To Create Custom Products: Mixtures can be used to create custom products that are tailored to specific needs. For example, mixing different essential oils together can create a personalized perfume.
9. To Preserve Food: Mixtures can also be used to preserve food. For example, saltwater is a mixture that can be used to preserve meat and fish.
10. To Create Art and Craft Projects: Finally, mixtures can be used to create art and craft projects. For example, mixing different colors of dye together can create a beautiful tie-dye shirt. 

Evaluation

1. Why do people create mixtures? a) To make things worse b) To create something new and exciting c) To harm the environment
2. What is an example of a mixture used to improve food texture? a) Lemonade b) Trail mix c) Pastry dough
3. What is an example of a mixture used to improve the nutritional value of food? a) Salad dressing b) Breakfast cereal c) Gasoline
4. What is an example of a mixture used in science experiments? a) Salad dressing b) Cement c) Different chemicals
5. What is an example of a mixture used in construction? a) Lemonade b) Salad dressing c) Concrete
6. What is an example of a mixture used to create a custom product? a) Salad dressing b) Essential oils c) Gravel
7. What is an example of a mixture used to preserve food? a) Sugar b) Saltwater c) Salad dressing
8. What is an example of a mixture used to achieve a specific function? a) Coffee b) Gasoline c) Ink
9. What is an example of a mixture used in art and craft projects? a) Lemonade b) Tie-dye dye c) Cement
10. Why are mixtures important? a) They can create something new and exciting b) They can improve things c) Both a and b.

Lesson Presentation

Introduction (10 minutes):

• Start the lesson by asking students if they know what a mixture is.
• Write down their responses on the whiteboard.
• Briefly explain what a mixture is (when two or more things are mixed together to make something new).

Definition of Mixtures (10 minutes):

• Explain that a mixture is made up of two or more substances that are combined but not chemically joined together.
• Provide examples of common mixtures (e.g., salad, trail mix, paint, etc.).
• Use visual aids (pictures of mixtures) to help illustrate the concept.

Reasons for Mixtures (15 minutes):

• Explain that people create mixtures for many different reasons.
• Provide examples of reasons for mixtures (e.g., to create something new and exciting, to improve something, to achieve a specific function, etc.).
• Use visual aids to help illustrate these examples.

Examples of Mixtures (15 minutes):

• Provide a list of examples of mixtures and have students identify whether they are mixtures or not.
• Use sample mixtures (e.g., different colored paints, trail mix, etc.) to help illustrate the concept.
• Ask students to provide other examples of mixtures.

Conclusion (10 minutes):

• Recap what was learned in the lesson.
• Review the definition of a mixture, provide examples of mixtures, and identify some reasons why people make mixtures.
• Have students answer a few questions or complete a worksheet to assess their understanding of the topic.

Assessment:

• Ask students to complete a worksheet or answer questions to assess their understanding of the topic.

Optional Extension Activities:

• Have students create their own mixtures and explain why they created them.
• Ask students to research and present on a specific mixture and its uses.

Weekly Assessment /Test 

1. A mixture is made up of two or more substances that are combined but not ____________ joined together.
2. People create mixtures for many different reasons, such as to create something new and ____________, to improve something, or to achieve a specific function.
3. An example of a mixture used in cooking is a salad, which is a mixture of different ____________.
4. Adding sugar to lemon juice makes it taste better, which is an example of using a mixture to ____________ something.
5. Concrete is a mixture of cement, sand, and ____________ that is used in construction projects.
6. Saltwater is a mixture that can be used to ____________ food.
7. Gasoline is a mixture of different ____________ that is designed to power vehicles and machinery.
8. Paint is a mixture of pigment, binder, and ____________.
9. Trail mix is a mixture of nuts, seeds, and dried ____________.
10. Mixing different chemicals together can create new ____________ and reactions in science experiments.