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Trees and Leaves

6th Grade Science

TermDefinition
perennial lives for more than two years
trunk single stem that supports the tree
roots brings water and nutrients to the tree
deciduous trees that drop their leaves at the end of the growing season in the fall
coniferous trees have needles for “leaves” and cones; keep their needles all year and will drop their cones
crown holds branches and the leaves
branches provides support and movement of water and nutrients transported through trees
photosynthesis food is made for the tree and oxygen for all living things
simple leaves leaves with only one blade
compound leaves leaves with more than one blade
glucose main source of nutrition for plants
xylem transport tissue
stomata openings that absorb carbon dioxide
palisades cells that take in hydrogen and carbon dioxide
spongy cells cells that take in hydrogen and carbon dioxide
chloroplasts filled with green pigment; cell structure
chlorophyll green pigment
dendrology science and study of wooded plants
tree cookies cross sections of tree trunks that tell how the tree has grown
dendrochronology the scientific method of dating tree rings
dendrochronologist scientists who study the rings of trees
producers things that make the food for all living things in the forest
consumers living organisms that eat from other sources
primary consumers herbivores (only eat plants)
secondary consumers carnivores (eat meat)
decomposers tiny organisms that feed on the dead remains of plants and animals