# Photosynthesis

9SCIE - Plants as Producers

2020

## Mahi Tuatahi

Choose two seeds below. In your book, Describe at least two adaptations that help it be dispersed and explain why dispersal is important.

## Ngā Whāinga Ako

1. Describe and explain the process of photosynthesis
2. Explain why plants are so important to life on Earth

## The Importance of Photosynthesis

• The sun is the main source of energy for life on Earth
• Plants are the first step in the energy chain. They convert light into chemical energy (sugar)!
• Next, herbivores consume the plants, and carnivores or omnivores consume the herbivores!

What else do plants do?

• They take in carbon dioxide gas (our waste product)
• They produce oxygen gas for us to breathe!

### The Equation

\begin{aligned} \text{carbon dioxide} + \text{water} \xrightarrow{\text{light}} \text{sugar} + \text{oxygen} + \text{energy} \end{aligned}

## Where Does Photosynthesis Occur?

• Plant cells have 10-100 chloroplasts
• Photosynthesis occurs in chloroplasts
• Chloroplasts have a pigment called chlorophyll which makes them green!

### How do Plants Breathe?

• They have small openings in their leaves called stomata
• These stomata allow carbon dioxide in, and oxygen gas out