Chapter 4: Getting to Know Plants

Plants differ based on the strength and thickness of their stems:
1. Trees: Have thick, hard, woody brown trunks that stand erect independently (e.g., Banyan tree, Neem tree).
2. Climbers: Have weak, green stems that cannot stand upright alone. They produce tendrils to climb up walls, fences, or other trees (e.g., Money plant, Pea plant, Grapevine).
3. Creepers: Have soft, fragile stems and heavy fruits that creep along the horizontal surface of the ground (e.g., Pumpkin, Watermelon).

Leaves are called the food factories because they prepare nourishment for the entire plant through the process of photosynthesis:
• Leaves contain a green pigment called chlorophyll that traps light energy from the sun.
• They absorb carbon dioxide gas from surrounding air through tiny pores called stomata.
• Roots absorb water and minerals from soil and send them up the stem into the leaves.
• Using sunlight, water, and carbon dioxide, the leaf manufactures sugar (glucose) and releases life-giving oxygen into the air.

• Reticulate Venation: The veins branch out to create a web-like or criss-cross network across the entire leaf blade (e.g., Rose, Peepal, China Rose).
• Parallel Venation: The veins run side-by-side in parallel straight lines from the base to the leaf tip (e.g., Grass, Wheat, Maize, Banana).

Plant Classification:
• (a) Herb: Has a green, soft, delicate stem with no wood (e.g., Mint, Coriander, Wheat).
• (b) Shrub: Medium-sized plant with a hard, woody stem branching out from near the base, resembling a bush (e.g., Rose, Hibiscus, Lemon).
• (c) Tree: Tall plant with a single, thick, hard, dark woody stem called the trunk (e.g., Neem, Banyan, Mango).

Step-by-Step Leaf Rubbing:
1. Place a fresh leaf with prominent veins on a flat wooden table with its rough underside facing upward.
2. Lay a thin sheet of white paper flat over the leaf.
3. Take a wax crayon on its side and gently rub it back and forth over the paper.
4. The raised pattern of the leaf's central midrib and side veins will magically appear on the paper.

Medicinal Plant Remedies:
• Tulsi: Relieves cough, throat infection, and seasonal cold.
• Aloe Vera: Soothes burns, cuts, and moisturizes skin.
• Neem: Antibacterial protection, purification, and skin healing.

Four Essentials for Plants:
1. Sunlight (from the Sun)
2. Water (absorbed by roots from soil)
3. Carbon Dioxide (absorbed from air through leaf pores/stomata)
4. Chlorophyll (the green pigment present in leaves).

Observations:
1. Interdependence: Plants, animals, and humans depend closely on each other for food, oxygen, and shelter.
2. Community Helpers: People in our neighbourhood perform essential services (farmers, sanitation workers, doctors, teachers).
3. Resource Conservation: Water, soil, and clean air are precious gifts that must not be polluted or wasted.

Seasonal Impact:
• Summer: We wear light cotton clothes, drink lots of water and fresh juices, and eat fruits like mangoes and watermelons.
• Winter: We wear warm woollens, enjoy hot soups and nuts, and sit in the sun.
• Monsoon: We use umbrellas and raincoats, and enjoy hot pakoras while taking care to avoid stagnant water.

Daily Actions:
1. Segregate Waste: Keep green dustbins for wet biodegradable kitchen waste and blue dustbins for dry recyclable plastic/paper.
2. Avoid Single-Use Plastic: Carry cloth bags for vegetable shopping and refill reusable steel water bottles.

Classification:
• Living Things: Neem tree, Butterfly, Honeybee (they breathe, grow, and reproduce).
• Non-Living Things: School bus, River stone, Wooden table (they do not grow or breathe).

Leaf Observations:
• Shape: Banana leaves are broad and long, peepal leaves have a pointed tip, and pine needles are thin and pointy.
• Colour: Leaves vary from light yellow-green to dark emerald green, and some crotons have red or purple spots.
• Texture: Lotus leaves feel waxy, rose leaves feel soft with serrated margins, and hibiscus leaves feel slightly rough.

Importance & Method:
• Washing with soap removes invisible disease-causing germs and bacteria.
• Steps: Wet hands, apply soap, rub palms together, wash backs of hands, clean between fingers and under nails, rinse thoroughly under running water, and dry with a clean towel.

Water Saving Ways:
1. Turn off the tap tightly while brushing teeth instead of letting water run.
2. Use a bucket and mug for bathing rather than a shower.
3. Pour leftover water from drinking bottles into plant pots instead of draining it away.

Helping Summer Animals:
• Place an earthen clay bowl filled with clean fresh water on the terrace, balcony, or under a tree for thirsty birds.
• Keep a bowl of water in the shade outside the house for community dogs and cats.
• Never disturb bird nests or throw stones at sleeping animals.

Festivals and Traditional Foods:
1. Eid: Families prepare and share sweet Sevaiyan (vermicelli pudding) and biryani with neighbours.
2. Holi: People celebrate spring by sharing traditional Gujiyas and refreshing thandai.
3. Diwali: Families distribute homemade Laddoos, kaju katli, and savoury namkeens.

Answers:
• (a) True: Photosynthesis produces oxygen.
• (b) True: Rainwater harvesting replenishes groundwater.
• (c) False: Burning releases toxic smoke and causes severe air pollution. Dry leaves should be composted into organic manure.