Looking at the leaf cross section and exploring the biology of leaves

Today we will evaluate our cell quiz and focus on chloroplasts and photosynthesis

You will make a prepared slide of a leaf and also a  leaf cross section and explain how each part helps the leaf perform photosynthesis

LEAF OBSERVATIONS

1.  GO to the school garden and pick up a leaf.

Leaf Lab

Purpose is to observe properties of a deciduous leaf

1.      Draw the leaf (both sides).  The drawing is 1/3 of the page.

Observe some characteristics and label any parts you see.

(colour, how are the two sides different?).  What do you think

the parts are for?

Darker on top than the bottom – Why? More

Pigment for photosynthesis.  They photosynthesize

using chlorophyll and there is more sunlight reaching the top.

Veins – send nutrients and water and sugar around the plant

Veins are moving up from the ground. They transport water

From the ground. 

The top side has a waxy covering – cuticle. Bottom side doesn’t have a cuticle

2.      Make a prepared slide of a tiny part of the leaf. 

Now carefully draw your leaf

View using

a.     half a page for low

b.     half a page for medium OR large.

3.      Make a prepared slide of a tiny little sample of grass

a.     low

b.     medium

4.      Observe a leaf cross section and label parts. Draw under 
a. medium or high power