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The process that uses energy from the sun to make food.
Photosynthesis
What are the 2 main reactants of photosynthesis?
Carbon dioxide and water
What are products of photosynthesis?
Oxygen and Glucose
This green pigment captures energy from sunlight inside a plant's leaves.
Chlorophyll
Farmers add this to their fields because it makes crops grow larger and produce a higher yield.
Fertilizers
This essential mineral is needed to make the green pigment chlorophyll.
Magnesium
This chemical reagent is used to test for starch and turns blue-black if starch is present.
Iodine Solution
This mineral contains N atoms and is essential for making proteins.
Nitrate
This gas is taken in by plant leaves from the air during photosynthesis.
CO2 in photosynthesis
This protective layer on the top of a leaf stops it from drying out.
Waxy layer
The tiny pores in the bottom of leaves that take in carbon dioxide from the air.
Stomata
Carbon dioxide gas enters the leaf from the air through stomata via this passive physical process.
Diffusion
In a leaf cross-section, these structures bring water directly to the cells inside the leaf.
Vein varices / vein cells / vascular tissues / veins
The cells inside a plant leaf produce oxygen when they photosynthesise. Suggest what happens to this oxygen.
Most diffuses out of the leaf and into the surrounding atmosphere, while a portion is used by the plant itself for cellular respiration.
This layer of the leaf has lots of air spaces to allow gases to diffuse in and out.
Spongy Layer
If a plant does not have enough of this, its leaves look yellow instead of green.
Magnesium
On warm, sunny days, plants make more carbohydrates than they immediately use, storing them temporarily at night or storing them in this specific form inside their cells.
Starch
Without enough of this, leaves stay small.
Nitrate
In the leaf structure, the lower epidermis contains these tiny specialized structures that regulate gas exchange.
Stomata
What is the word equation for photosynthesis?
water + carbon dioxide → glucose + oxygen
Photosynthesis is carried out in these, which are located in the cells that are underneath the epidermis.
Chloroplasts
This layer inside a leaf contains cells with the most chloroplasts, doing most of the photosynthesis.
Palisade Layer
Give two reasons why most life would not be able to survive if there were no plants on Earth.
Food/energy, oxygen
State at least 2 factors that affect the rate of photosynthesis.
- Light Intensity
- Carbon Dioxide Concentration
- Temperature
- Water Availability
State 3 adaptations of leaves to maximize photosynthesis.
- Large Surface Area
- Thin Structure
- Chlorophyll/Chloroplasts
- Stomata
- Network of Veins
- Transparent Epidermis and Cuticle