Trees (Junior Cert Wood Technology): Flashcards
📚Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Transpiration
Transpiration
Water moves through tree, then into air
Transpiration functions
Transpiration functions
Cools tree, aids water & nutrient movement
Tree Physiology
Tree Physiology
Study of life activities in trees for growth & survival
Water Uptake
Water Uptake
Roots absorb water from soil, it travels upward in tree
Nutrient Transport
Nutrient Transport
Moving minerals from roots to other tree parts
Environmental Factors (transpiration)
Environmental Factors (transpiration)
Temperature, humidity, wind affecting tree processes
Where transpiration starts
Where transpiration starts
Water absorption by roots
Cohesion-tension theory
Cohesion-tension theory
Explains water movement through xylem vessels
Where water exits as vapour
Where water exits as vapour
From stomata in the leaves
Transpirational Pull effect
Transpirational Pull effect
Creates negative pressure in xylem, moves water & nutrients
Temperature effect on transpiration
Temperature effect on transpiration
Speeds up evaporation, may open stomata faster
Humidity effect on transpiration
Humidity effect on transpiration
Reduces transpiration; higher humidity slows it
Wind effect on transpiration
Wind effect on transpiration
Speeds it up by moving water vapour away from leaves
