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How do plants interact with their environment?
Leaves
Leaves
are the part of a plant
where
photosynthesis
takes
place. Plants make their food
in the leaves. The wide, flat part
of a leaf is called the
blade
.
It is connected to the stem by
the
petiole
.
Simple leaves
have one blade.
Compound leaves
are divided
into smaller parts called
leaflets.
7
A simple leaf from an oak tree.
A compound leaf from an ash tree.
2
Copy and complete these sentences in your notebook.
a)
... plants have hard ...
d)
Trees have a thick stem called a ...
b)
... plants have soft, ... stems.
e)
The stem supports the ... and the ...
c)
The ... connects a leaf to the stem.
f)
A simple leaf has one ...
3
4
What parts of plants can we eat? Copy these words in two columns.
Then listen and match the parts of the plant to the food.
Plant part: stem
seeds
roots
leaves
flowers
fruit
Food: carrot
leek
lettuce
cauliflower
sunflower
asparagus
broccoli
tomato
lentils
4
What is the function of the stem, the roots and the leaves? Test your partner.
What is the function of the ...? The ... is the part of the plant that ...
5
Find out about leaves. Work in a group.
a)
Draw a picture of each leaf.
b)
Classify the leaves: simple or compound.
6
How do roots and stems work? Do this experiment.
a)
Put a white flower into a jug of water.
c)
Observe the flower for several hours.
b)
Add blue food colouring to the water.
d)
What happens? Why?
7
5
Quiz
Check your learning.
A
C T i V i T i E S
Petiole
Petiole
Blade
Leaflets