The sense organs – Introduction to sense organ of smell The Nose Basic Science Primary 2 First Term Lesson Notes Week 5

Grade: Primary 2

Subject: Basic Science

Topic: The Sense Organ of Smelling – Understanding the Nose and Its Functions

Duration: 45 minutes

Learning Objectives: By the end of this lesson, students should be able to:

1. Identify the sense organ responsible for the sense of smell (the nose).
2. Describe the structure of the nose, including two nostrils.
3. Explain how our sense of smell helps us in daily life.
4. Understand the role of the nose in breathing.
5. Recognize the terms “oxygen” and “carbon dioxide” in relation to breathing.

Embedded Core Skills:

• Observational skills.
• Listening and comprehension.
• Vocabulary development.
• Critical thinking.
• Communication skills.

Learning Materials:

1. Diagram or illustration of the nose.
2. Pictures of various smells (e.g., flowers, spoiled food).
3. Whiteboard and markers.
4. A model of the respiratory system (optional).
5. Perfume samples (optional).

Content:

Hello there, young learners! 🌼 Today, we’re going to explore our amazing sense of smell and how our nose helps us discover the world of scents. 🌬️👃

Our Sense Organ for Smelling: Our sense of smell comes from a special organ called the nose. 🐘

Two Nostrils: Our nose has two nostrils, one on each side. 🌬️🌬️

Using Our Nose for Smelling: We use our nose to smell things around us. Just like when you smell your favorite food, or you know something is delicious even before you taste it. 😋🍕

Detecting Spoiled Food: Our nose helps us know if food is spoilt or rotten by its smell. For example, when milk goes bad, it doesn’t smell nice anymore. 🥛😷

Detecting a Dead Rat: If there’s a dead rat in the house, we can know it’s there by the smell of the rat. It’s like our nose is a detective, helping us find things we can’t see. 🐀👃🕵️

Breathing with Our Nose: We can also breathe with our nose. When we do, we take in oxygen, which is the air our body needs to live. It’s like our nose is our body’s special air door. 🚪💨

Oxygen and Carbon Dioxide: The air we breathe in (oxygen) helps our body work, and when we breathe out, it’s called carbon dioxide. It’s like a little recycling system. We breathe in the good air and breathe out what our body doesn’t need. 🔄

Smelling Perfume: Have you ever smelled a beautiful and pleasant perfume on someone? Perfume smells nice, and we can enjoy it because of our amazing noses. 💐🌸

Do You Like Perfume? Some people like to wear perfume, and others like to enjoy the lovely scents. Do you like perfume? How about your parents? 👨‍👩‍👧‍👦❤️

Remember, our nose is a wonderful sense organ that helps us enjoy delicious food, avoid bad smells, and appreciate lovely scents. So, take a deep breath and enjoy the world of smells around you! 🌬️🌍🌸

Evaluation:

1. The sense organ for smelling is the _____.
a) eye
b) nose
c) ear
d) mouth

2. How many nostrils do we have in our nose?
a) one
b) two
c) three
d) four

3. We use our nose for _____.
a) seeing
b) hearing
c) smelling
d) tasting

4. We can tell if food is spoilt or rotten by its _____.
a) taste
b) smell
c) color
d) sound

5. How can we know if there’s a dead rat in the house?
a) by looking
b) by hearing
c) by smelling
d) by touching

6. We can breathe with our _____.
a) mouth
b) eyes
c) nose
d) ears

7. The air we breathe in is called _____.
a) oxygen
b) carbon dioxide
c) nitrogen
d) helium

8. What is the name for the air we breathe out?
a) oxygen
b) carbon dioxide
c) nitrogen
d) helium

9. We can also smell _____ on people’s bodies.
a) music
b) books
c) perfume
d) flowers

10. Do you like _____?
a) chocolate
b) pizza
c) perfume
d) school

11. Do your parents like to use _____?
a) bicycles
b) toys
c) perfume
d) vegetables

12. Our sense of smell helps us discover _____ around us.
a) colors
b) sounds
c) smells
d) shapes

13. When food is _____, it doesn’t smell good to eat.
a) fresh
b) hot
c) spicy
d) spoilt

14. The sense organ for smelling is the _____.
a) eye
b) ear
c) nose
d) mouth

15. We can tell if something smells nice or not with our _____.
a) skin
b) nose
c) tongue
d) ears

Presentation: Introduction (5 minutes):

• Begin the lesson by asking students what they know about the sense of smell.
• Introduce the topic by explaining that we’re going to learn about the sense organ responsible for smelling, which is our nose.

Understanding the Nose (10 minutes):

• Show a diagram or illustration of the nose to the class.
• Discuss the structure of the nose, including the presence of two nostrils and their location on our faces.
• Encourage students to touch their noses to feel the shape and the two nostrils.

The Role of the Nose (10 minutes):

• Explain that we use our nose to smell things around us, like delicious food and lovely scents.
• Discuss how we can tell if food is spoiled or rotten by its smell.
• Mention that if there’s a dead rat in the house, we can know it’s there by the smell of the rat.
• Emphasize that our nose helps us in everyday life by alerting us to different scents.

Breathing with Our Nose (5 minutes):

• Explain that we can also breathe with our nose.
• Discuss the terms oxygen (the air we breathe in) and carbon dioxide (the air we breathe out).
• Use simple language to explain the process of breathing and how our nose is involved.

Smelling Perfume (5 minutes):

• If possible, provide perfume samples for students to smell.
• Discuss how we can smell beautiful and pleasant perfume on people’s bodies.
• Ask students if they like perfume and if their parents use it.

Teacher’s Activities (5 minutes):

• Summarize the key points of the lesson.
• Encourage students to ask questions or share their thoughts.

Learners’ Activities (5 minutes):

• Allow students to ask questions or share their experiences related to smelling and the nose.

Assessment (5 minutes):

• Distribute a worksheet with simple questions related to the lesson.
• Collect and review the worksheets to assess students’ understanding.

Conclusion (5 minutes):

• Recap the main points of the lesson, emphasizing the role of the nose in smelling and breathing.
• Encourage students to appreciate their sense of smell and the wonderful world of scents around them.

Homework:

• Assign homework that involves students observing and describing different smells at home and sharing their findings in the next class