biology unit 5(photosynthesis) new

what is the photosynthesis equation

Water+carbon dioxide-sunlight/chlorophyll-glucose+oxygen

what is photosynthesis

The chemical reaction plants carry out to make their own food,using light energy to create glucose, taking place in the chlorophyll in the leaf

what factors affect the rate of photosynthesis

Tempreture

Light intensity

Carbon dioxide

list the parts of the leaf

Waxy cuticule

Upper epidermis

Palyside layer

Spongy mesophyll

Lower epidermis-contain stomata and guard cells

list the process completed to test a leaf for startch

Boil the leaf to kill it

Decolourise using ethanol

Wash to soften

Test with iodine

What minerals do plants need for healthy growth

Nitrates

Pottasium

Phosphates

what happens to the planet if there is a lack of nitrates

poor growth

what happens when their is a lack of pottasium in plants

Yellowing of the leaf

what happens when their is a lack of phospahets in the plant

Poor root growth

why is water important in photosynthesis

It is used for the transport of minerals and provides support by filling the cell vacuoles which push against cell walls. This keeps cells turgid and prevents cells becoming flaccid and wilting

what is transpiration

Water from the xylem evaporates into air spaces, some water is lost the stomata

what factors affect the rat of transpiration

An increase in light intensity, tempreture, humidity and wind spped

how do root hair help traspiration

Increase the surface area for absoprtion of water.

Minerals are activlet transported into the cell which allow water to be drawn by osmosis into the rot cells and them the xylem