Spacebiology Flashcards
(41 cards)
What is the photosynthesis equation
Light energy —> chemical energy
Carbon dioxide + water —> glucose + oxygen
How do plants make their own food
Using photosynthesis
What Is photosynthesis
When plants make their own food they get light from the sun and convert that energy into chemical energy which produces food for the plant to grow
Name 7 foods from plants
So ya Oranges Peas Cabbage Carrots Wheat Potatoes
Name 4 medicines from plants
Rosy Periwinkle
Mandrake
Poppy
Foxglove
Name 2 raw materials from plants
Cotton
Timber
Where does photosynthesis take place
On the leaves of the plant
What is useful about glucose when produced in photosynthesis
It can be stored as starch or used for the plant to grow
What 2 colours of light do plants absorb the best
Blue and red
What is the method to test for starch in a leaf
Boil it in water to break down the membranes
Boil it in ethanol (alcoholic acid) to remove the chlorophyll
Warm it in water to soften it
Add iodine to test for starch
What do we need to make photosynthesis work
The light from the sun and the chlorophyll from the leaves
What is chlorophyll
The dye that makes leaves green
How do we know if there’s starch in a leaf
When we add iodine it goes from brown to blue/ black
What is epidermis
Thin layer of cells covering a plant
What do you need for photosynthesis to take place in plant leaves
Water and carbon dioxide
Where does water enter during photosynthesis
Root hair cells then travels to leaves through the xylem vessels and excess water leaves the leaves by evaporating
Where does carbon dioxide enter during photosynthesis
Stomata (holes in leaves)
Name 3 ways carbon dioxide is added to the atmosphere
Decomposition
Respiration
Combustion (burning )
What is germination
When a seed begins to grow and the seed coat breaks and the root begins to show
What do seeds need to germinate
Water oxygen warmth
What do seeds use once they have germinated
Light and carbon dioxide
When a seed germinates what comes after
The shoot comes out of the root
What does propagating mean
Growing
What happens when plants don’t produce seeds
The reproduce using plant propagating structures like bulbs, tubers and runners
