NATURAL SCIENCE - YEAR 4 - UNIT: LIVING ORGANISMS - LESSON: RESPIRATION IN PLANTS - INTERACTION IN PLANTS

 NATURAL SCIENCE - YEAR 4

UNIT: LIVING ORGANISMS

LESSON: RESPIRATION IN PLANTS - INTERACTION IN PLANTS

Let's start our lesson doing our Unit's song:

Now... Think about this question:... Why are plants so important for humans and animals?

They are very important because they produce food for us and because they produce oxygen.

When do plants produce oxygen?... 

Plants produce oxygen when they do photosynthesis.

Now let's think... Plants are living things and living things need oxygen to live... So... How can they do that? How can plants produce oxygen and consume oxygen?

... Well, they have two processes:

PHOTOSYNTHESIS: When plants do photosynthesis they take carbon dioxide from the air and produce or expel oxygen... They produce a lot of oxygen

RESPIRATION: When plants do respiration they take oxygen from the air and expel carbon dioxide.

This picture shows us this process:

Now... Think about this other question:

Humans and animals have reactions, right? We can feel, we can move... We interact.

Now... Do you think that plants have reactions?

Yes, they react to water, to light (moving to get sunlight) and some plants react to physical contact... Watch the plant on this video... It's called Mimosa and it reacts to physical contact:

Yes... Plants also have the function of interaction...

Now, this is our lesson's summary:

IF YOU CLICK ON THIS LINK YOU WILL GET TO A GLOSSARY WITH THE MOST IMPORTANT WORDS IN THIS UNIT

INTERACTIVE GAMES - CLICK ON THESE LINKS:

PHOTOSYNTHESIS

RESPIRATION AND PHOTOSYNTHESIS I

RESPIRATION AND PHOTOSYNTHESIS II

PLANT INTERACTION I

PLANT INTERACTION II