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7th Grade Sci Ch.12
| Question | Answer |
|---|---|
| the ring of cells just below the bark of a tree | vascular cambium |
| the main tissue of a trunk | wood |
| functioning wood surrounding the dead wood in the center of a tree | sapwood |
| producing male and female reproductive parts on two separate trees | dioecious |
| the tallest tree species | coast redwood |
| the leaves at the top of a fully grown tree | crown |
| the central core of a young woody stem | pith |
| a single layer of cells that forms at the base of a petiole to sever a leaf from the branch | abscission layer |
| the rough outer covering of a tree | bark |
| small pores that allow air to enter the stem | lenticels |
| a place on a stem that leaves grow out of | node |
| older layers of wood toward the center of a tree that have died and become clogged with gummy deposits | heartwood |
| gymnosperms with cone-shaped reproductive structures | conifers |
| losing leaves in the fall and staying bare all winter | deciduous |
| a waxy protective layer on a leaf that encourages water retention | cuticle |
| a perennial, woody plant that grows to be at least 20 feet tall and has a single main stem | tree |
| a forest's thick top layer of interlaced leaves | canopy |
| foresters deliberately setting fire to a forest under controlled circumstances | prescribed burning |
| removing trees from the forest | deforestation |
| the northern and southern limit at which trees grow | tree line |
| the care and culture of forest trees | silviculture |
| the forest that grows up after an old growth forest is cut | secondary forest |
| any system or object that absorbs carbon dioxide from the environment | carbon sink |
| a group of tall trees or plants | stand |
| removing all the trees from areas that are 100 acres or less | block cutting |
| the first head of the Forest Service | Gifford Pinchot |
| the top layer of trees that form the canopy | overstory |
| the most destructive type of forest fire | crown fire |
| young tree | sapling |
| a fire that sweeps through the forest floor | ground fire |
| the science of managing and studying forests and related natural resources | forestry |
| a dense collection of trees with a thick top layer of interlaced leaves | forest |
| the divisions of a tree's stems from smallest to largest | twig, branch, limb, trunk |
| the gymnosperm that looks like a palm tree | cycad |
| two basic shapes of crown branching | spreading branch and spirelike branching |
| the oldest known organisms on earth | bristle-cone pines |
| 3 functions of tree roots | absorbing water & minerals, anchors the tree in the soil, stores food |
| where is a tree's xylem located | wood |
| where is a tree's phloem located | inner bark |
| keeping leaves during the winter | evergreen |
| angiosperm trees | broadleaf trees and hardwood trees |
| gymnosperm trees | ginkgo, conifers, cycads, softwood trees |
| protects undeveloped tree parts from harsh winter weather | bud scale |
| a leaf near the bottom of a tree | shade leaf |
| growth in diameter | secondary growth |
| allows a stem to grow in length | terminal bud |
| yellow pigment | xanthophyll |
| orange pigment | carotene |
| purple, red, & blue pigments | anthocyanin |
| all that remains on a branch after a leaf falls off | leaf scar |
| abnormal tree growth caused by insects | gall |
| technical term for a system or object that produces carbon dioxide | carbon source |
| American forest region that runs along the Mississippi River | bottomland hardwood forest |
| American forest region from Canada to Mexico | Rocky Mountain forest |
| American forest region that includes Florida | Southern forest |
| two types of tree roots | taproots & spreading roots |
| deforestation method that involves removing all but a few select tress from a given area | seed-tree method |
| The thick, small leaves at the tops of trees | sun leaves |
Created by:
vwalker5