WATER CYCLE

The circulation of water on Earth is known as the water cycle.

A VIDEO ABOUT SEXUAL REPRODUCTION IN PLANTS

REPRODUCTION FUNCTION IN PLANTS

Thanks to this function, plants can produce offspring.

Most plants reproduce via their flowers. The stages are: pollination, fertilization, seed and fruitformation, and germination.

1) POLLINATION: pollen from a flower moves to another flower of the same type.




2) FERTILISATION: is the union of one polen grain and the ovule of another flower of the same type.



3) SEED AND FRUIT FORMATION: the embryo develops forming the seed and then changes to became a fruit.



4) GERMINATION: when the seed is in the soil, it forms a new plant.

INTERACTION FUNCTION IN PLANTS

Plants react and adapt to changes that occur in their environment.

Reactions to light: stems grow towards light source.
Reactions to water: roots grow to get water.
Reactions to contact.

THE FOUR SEASONS AND PLANTS.

RESPIRATION IN PLANTS

As living organisms, plants need to respire, so they absorb oxygen from the air and release carbon dioxide.

                                         

SOME VIDEOS ABOUT "PHOTOSYNTHESIS"

NUTRITION FUNCTION IN PLANTS

Plants perform photosynthesis because it generates the food and energy they need for growth and cellular respiration.

Photosynthesis is the process by which plants make their own food. 

To make food plants need:

• carbon dioxide
• water and minerals from the soil (xylem sap)
• sunlight 

Then, plants expel oxygen to the air.