Topic 7: Osmosis and Transpiration

Task 1:

Photosynthesis - Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into sugar, glucose, or oxygen. Photosynthesis includes the four main parts of a plant, the leaves, the stem, the roots and the flower.

Osmosis - Osmosis is the process by which water moves from the roots of the plant upwards defying gravity and then dispersing itself between the leaves. Tiny cells found in the plant called xylem help the water move upwards. More tiny cells called Phloem help distribute the water around the plant.

Transpiration - Transpiration is when the sunlight the plant absorbs evaporates the water that has also been absorbed by the plant.

Task 2: Celery and food colouring experiment

Supplies:
Beaker

Conical flask

Water

Food colouring

Bags

Twist tie.

Steps/Method:
- Fill a beaker to around 150ml of water

• Next cut the end of a celery stick off
• Add food colouring into the water, about 10 drops
• Add the celery stick to the water
• Cover the top of the celery with a plastic bag and tie it up with a twist tie
• Wait around 30 minutes before lifting the plastic bag off the celery, also make sure not to touch the celery or else it could affect the outcome.

Observation:
Locate water movement from the roots to the leaves through xylem.

Blogpost: https://pbsoscars.blogspot.com/2021/07/osmosis-transpiration-science-tech.html