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40 Cards in this Set

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  • Back
tiny cell structures containing a green pigment called chlorphyll
chloroplasts
uses the sun's light energy to change 2 substances into food
chlorophyll
the two substances turned into food
carbon dioxide and water
makes food for the plant
leaves
a form of sugar
glucose
outer covering of a tree
bark
protects the tree from disease and from drying out
bark
cambium
thin growing layer of living cells
heartwood
the very center of a tree
Why do plants need to trap energy?
they can't move around to find food
green pigment that collects light from the sun and stores it as food energy
chlorophyll
a gas that is found in the air
carbon dioxide
how carbon dioxide enters the the plant
through tiny holes on the underside of the leaves
how water enters the plant
through the roots
how water gets from the roots to the stem and leaves
conducting tissue
the food produced y a plant
glucose
the process of using light energy to combine carbon dioxide and wter to produce glucose
photosynthesis
means light
photo
synthesis
means joining together
waste product produced during photosynthesis
oxygen
how oxygen leaves plants
through tiny holes through which the carbon dioxide enters
at night or on cloudy days
when photosynthesis can't take place
why plants store food
they can't always make it
(for ex., night, cloudy days, drought)
how extra glucose is stored
as starch
a chemical that is a chain of sugar molecules
starch
where starch is stored
leaves (lettuce)
leaf stalks (celery)
roots (carrots)
underground stems (white potatos)
what energy is used for
to grown
produce seeds
live
what releases the energy found in food
oxygen
cell respiration
the process of releasing energy found in food
the Earth's producers
photosynthetic organisms - mostly plants
reasons plants are so important
food
give off oxygen (21% of air)
- we need oxygen to release energy from food to grow and live
what plants combine duing photosynthesis
light and carbon dioxide
the way oxygen was created and led to animal life
bacteria on the oceans carried on photosynthesis and oxygen plants expelled began to collect in the air - when enough oxygen was in the air, animal life began
phytoplankton
evolved from bacteria - now produces about 70 % of the oxygen humans and animals breathe
30%
the amount of oxygen produced by plants living on the land
21%
the amount of oxygen we need to have in the atmosphere in order to breathe
cell respiration
the process of using oxygen to release the energy in food in a usable form
another word for breathing
respiration
the use of xoygen to break down glucose
cell respiration
waste products of cell respiration
water and carbon dioxide