diff --git a/Grade 9/Science/SNC1DZ/Study_Sheet.md b/Grade 9/Science/SNC1DZ/Study_Sheet.md
index 0000f6f..7fc9a14 100644
--- a/Grade 9/Science/SNC1DZ/Study_Sheet.md	
+++ b/Grade 9/Science/SNC1DZ/Study_Sheet.md	
@@ -154,7 +154,7 @@
 - Silver cleaner for tarnished jewellery, dishes because silver reacts with air to turn black
 
 
-# Elements
+## Elements
 
 - At the present time ```118``` elements are known.
 - These elements vary widely in their abundance
@@ -278,6 +278,92 @@ weakening, or loss of value.**
 - Approx. `30%` is reflected back into space
 - `0.023%` absorbed by living organisms through photosynthesis
 
+## PHOTOSYNTHESIS
+
+- `PHOTO`
+    - Light
+
+- `SYNTHESIS`
+    - Put together
+
+- The process in which the Sun’s energy (LIGHT) is
+converted (put together with) into chemical
+energy AS GLUCOSE (sugar)
+
+## PHOTOSYNTHESIS
+
+- In order for photosynthesis to happen the plant will NEED:
+    - **IGHT**
+    - **CARBON DIOXIDE**
+    - **WATER**
+    - **CHLOROPHYLL (found inside the cell of a plant)**
+
+## Photosynthesis
+
+- Light energy turns the water & carbon dioxide into
+oxygen and glucose (sugar)
+
+- Sugar formed contains stored chemical energy
+
+- Stored in:
+    - Roots
+    - Stems
+    - Leaves
+    - Seeds
+
+- Plants convert the sugar to starch (for storage)
+- SOME sugars are rearranged to form:
+    - Carbohydrates (oxygen, hydrogen, carbon)
+    - Proteins (oxygen, hydrogen, carbon and NITROGEN)
+
+## Why is this important?
+
+- Animals cannot make their own food (glucose, energy)
+    - Must get our food from plants.
+
+- Plants are the first step in the food chain
+
+- Oxygen released during photosynthesis is necessary for all living things
+
+- **PRODUCER**: Organism that makes its own
+energy-rich food using the Sun’s energy
+    - GREEN PLANTS
+    - Green comes from chlorophyll (captures light)
+
+- **CONSUMER**: Organism that obtains its energy
+from consuming other organisms
+
+## Cellular Respiration
+
+- Process of converting sugar into carbon dioxide, water and energy
+
+- Makes stored energy available for use
+
+- Takes place in the mitochondria
+
+## Steps in Cellular Respiration
+
+- Mitochondria takes in nutrients
+    - Glucose and Oxygen
+- Breaks both nutrients down
+    - Creates energy for the cell
+
+- #### REVERSE of Photosynthesis
+    - Sugar breaks down into **CARBON DIOXIDE** and **WATER**
+        - Release of energy when this happens
+
+## Cellular Respiration
+
+### INFO
+
+1. Original energy stored in the sugar is released
+2. Occurs continuously
+3. Does NOT require light energy
+
+- **BOTH** producers **AND** consumers perform cellular respiration
+
+- ALL humans are consumers (unless you’re the hulk)
+
 
 ## Benefits of Succession
 - Provides a mechanism by which ecosysmtems maintain their long term sustainability.
@@ -290,6 +376,4 @@ weakening, or loss of value.**
 
 ## Biodiversity
 - The variety 
-- 
-