ISA Certified Arborist Exam Prep: Key Terms and Concepts, Exams of Forestry

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ISA Certified Arborist Exam Prep 2025- 2026 Success Guide

Chlorophyll - CORRECT ANSWER Makes the color or the leaves green so photosynthesis can take place Transpiration - CORRECT ANSWER-loss of water vapor from leaves Bark - CORRECT ANSWER-protects branches & trunk of tree from iniury Excurrent Growth - CORRECT ANSWER-Orientation of growth in external cell M.A.D.HORSE - CORRECT ANSWER-Opposite leaf arrangement MAPLE ASH DOGWOOD HORSECHESTNUT pH - CORRECT ANSWER-Measure of acidity or alkaline from 0 to 14 <7 acidic 7> Alkaline 7 Neutral Decurrent Growth - CORRECT ANSWER-rounded or broader tree growth Deciduous - CORRECT ANSWER-loss of leaves in the fall Respiration - CORRECT ANSWER-process of converting food into energy Stomata - CORRECT ANSWER-pours in leaves that open and close to allow for water transportation Xylem - CORRECT ANSWER-transportation for the water and minerals throughout the tree Phloem - CORRECT ANSWER-Conducls Carbohydrates Osmosis - CORRECT ANSWER-Process how water enters roots Organic Matter - CORRECT ANSWER-organic components that are decaying matter to help increase water holding & nutrients to improve soil structure Cation Exchange Capacity (CEC) - CORRECT ANSWER-measure of soils capacity to attract, retain & exchange a positive charge Girdling Roots - CORRECT ANSWER-roots that grow across or around the trunk, potentially choking off vascular tissues in a tree. May cause decline or death Taxonomy - CORRECT ANSWER-Classi fication of plants yori et et ete ~ 2k 2X eX eX Xé 2~ ee Ke aa v 4 w Leaves - CORRECT ANSWER-Food factories ' ¥ Cambium - CORRECT ANSWER-layer of cells located between the phloem & xylem as ¥ i “ Urea-formalehyde - CORRECT ANSWER-slow, soluble, synthetic fertilizer rn ‘ Leaching - CORRECT ANSWER-washing out of chemicals through soil i v i ¥ Organic Fertilization - CORRECT ANSWER-organic materials that are carbon based that ih ; ’ decompose slowly h a Susceptible/Pest Resistant - CORRECT ANSWER-cultivar selected to be adept from a disease Y or problem nN / ; Y Chlorosis - CORRECT ANSWER-yellowing veins within the leaf from mineral loss as v i Vv Fertilizer Analysis - CORRECT ANSWER-the % listed on the container for the fert. ny Vv Complete Fertilizer - CORRECT ANSWER-Nitro phosphorus & potassium listed (NPK) me y h y iN " ‘ y Planting Specifications - CORRECT ANSWER-detailed plans & statements for landscape ¥ i a Evergreen - CORRECT ANSWER maintain leaves throughout the seasons Mycorrhizae - CORRECT ANSWER-fungus roots Macropores - CORRECT ANSWER-air filled soil Rhizosphere - CORRECT ANSWER-soil zone immediately surrounding roots Field Capacity - CORRECT ANSWER-soil alter gravilational water has drained Buffering Capacity - CORRECT ANSWER-ability to maintain pH Gravilalional Watcr - CORRECT ANSWER-wator that drains from the macropores Meristems - CORRECT ANSWER part of the root that gets it get bigger Micropores - CORRECT ANSWER-tend to be water filled soil particles Clay - CORRECT ANSWER-fine textured soil particles; greater water holding capability Control of growth - CORRECT ANSWER-genetic potentials & environmental surroundings Root Pruning - CORRECT ANSWER-pre-digging to create a more densely rooted ball Sand - CORRECT ANSWER-course textured particles Compartmentalization - CORRECT ANSWER-natural process of defense in trees by which they wall off decay in wood Co-dominate Stems - CORRECT ANSWER-when 2 stems of the qual size arise from a union Topping - CORRECT ANSWER-cutting off the crown of a tree Cations - CORRECT ANSWER-elements dissolved into water that become positively charged particles Dicotyledon - CORRECT ANSWER-two seed leaves at germination