1. Gr. 6 Natural Science and Technology. 2015
Photosynthesis
Gr. 6
Natural Science and Technology.
2015

2. Photosynthesis KEY WORDS (Copy) Photosynthesis:
Process in which plants make their own food from carbon dioxide (CO2) and water, using light energy from the sun.
Glucose:
Type of sugar used as an energy source for many living organisms.
Starch:
Storage product in plants

3. Photosynthesis Why can plants make their own food, but animals can't?
Because they can photosynthesise.
PHOTOSYNTHESIS:
Plants change light energy from the sun into food energy.
It happens in all green parts of plants. (mostly in the leaves).

4. Copy the following pictures into your book. Use the whole page.
Class Activity (Copy)
Copy the following pictures into your book.
Use the whole page.
You may turn your book.

6. Light energy from the sun Carbon dioxide from the animals
Oxygen from the plants
Carbon dioxide from the animals
Food
Water from the roots

7. Photosynthesis (Copy)
Important requirements for photosynthesis to take place:
1. Chlorophyll:
A green substance plants use to capture light energy from the sun.
2. Sunlight:
Plants use the energy from the sun to produce glucose from water and carbon dioxide.

8. Photosynthesis (Copy)
3. Water:
Roots of plants absorb water and nutrients from the soil.
Water acts as a solvent, meaning that substances can dissolve in water in order to be transported throughout the plant.
It also provides support to the plant to keep it upright.

9. Photosynthesis (Copy)
4. Carbon dioxide:
The plants absorb carbon dioxide through little holes that are mostly found under the plant’s leaves.
5. Soil:
The soil provides mineral nutrients and water.
It also provides anchorage to the plant to keep it standing up straight.

10. Photosynthesis (Copy)
What is produced during photosynthesis:
Oxygen
Glucose
Formula for photosynthesis: (Copy)
H20 + C02 + sunlight + chlorophyll = glucose + O2

11. Photosynthesis

12. Photosynthesis How does photosynthesis occur?
Chlorophyll captures the sunlight energy.
This energy splits the water into hydrogen and oxygen.
The oxygen is released into the air.
The hydrogen is used with the carbon dioxide to make glucose (sugars).
The sugars are moved from the leaves to other parts of the plants where they are stored.
The water in plant veins carries the sugar. When the sugars reach the storage parts of the plant, they are changed into starch.

13. Photosynthesis HOMEWORK ACTIVITY
Find a picture of a plant and an animal and bring it to school tomorrow.

14. Class activity (Copy) Animal Plant
Paste the two pictures into your workbook.
Illustrate the gaseous exchange between animals and plants.
Animal
Plant
CO2 O2

15. Storage of starch in plants (Copy)
Plants store starch in the following places:
Leaves (cabbage, spinach, lettuce)
Fruit (apples, banana, peaches)
Stem (sugar cane)
Seeds (wheat or mealies)
Flowers (broccoli, cauliflower)
Roots (carrots, beetroot)

16. Take out a piece of paper Name: Class activity
Identify what part of the following plants we eat.
1. Cabbage-
2. Tomatoes-
3. Potatoes-
4. Broccoli-
5. Celery-
Leaves
6. Carrots-
7. Sunflower seeds-
8. Lettuce-
9. Sugar cane-
10. Bananas-
Root
Fruit
Seed
Leaf
Root
Stem
Flower
Fruits
Stem
Swap papers with the person next to you.

17. Photosynthesis: (Copy) Food from photosynthesis
Homework:
NS: Do a mind map on (Term 1 Topic 1) T1T1.
(Use your workbook AND textbook).