Transpiration

Question 1

How water enter roots hairs

Answer 1

Soil particles hold pure water
Cytoplasm of root hairs hold minerals
Cytoplasm is more concentrated than the solid water
Water enters the cytoplasm of the root hairs by osmosis

Question 2

How does water move upwards

Answer 2

Root pressure
Transpirational pull
Capillarity - tube has a small diameter

Question 3

Transpiration

Answer 3

Loss of water from leaves

Question 4

Who came up with Cohesion and Adhesion

Answer 4

Dixon and Joly
Trinity
1894

Question 5

Water movement through the Plant

Answer 5

Water builds up in the xylem of the roots through osmosis
Creates root pressure
Pushes up water in the xylem
Water in xylem is pulled up (transpiration)
Water evaporates through the stomata
More water has to been taken up
Creates a continuous downward tension from the leaves to the roots

Question 6

Cohesion and Adhesion

Answer 6

Water molecules are sticky and stick to each other (cohesion)
Stick to the side of the xylem vessels (Adhesion)
Water tension extend from the veins of leaves to the stem to the roots
The column of water in the xylem won’t break because of the cohesive properties
Continuous tension pulls more molecules up to replace the lost one (the transpirational stream)

Question 7

What is transported

Answer 7

Water
Carbon dioxide
Oxygen
Minerals