science unit 1 photosynthesis and the carbon cycle

grade 8

photosynthesis

the way plants make food

foodchain

shows how energy is passed along from one organism to another

importance of photosynthesis

provides energy in the form of chemical energy in nutrients and and provides oxygen for the earths atmosphere

chlorophyll

essential for photosynthesis

chloroplasts

photosynthesis happens inside them

starch

plants store carbohydrates as starch

word equation for photosynthesis

water + carbon dioxide - glucose + oxygen

vein

carries water to the cells in a leaf

lower epidermis

protects the cells in a leaf

waxy layer

stops the leaf cells from drying out

upper epidermis

protects the cells inside the leaf

palisade layer

contains most of the cells that do photosynthesis

spongy layer

do a small amount of photosynthesis

stomata

a tiny hole in the lower epidermis which let carbon dioxide from the air get into the leaf

yield

the quantity of crop the farmer harvests

magnesium

needed to make chlorophyll

nitrate

makes proteins

meteoroids

objects in space that are smaller than asteroids

meteors

when meteoroids enter earths atmosphere