Growth of plantsGrowth of plants

Group members (position)Group members (position).4E (09) Hon Ka Kit (designer).4E (09) Hon Ka Kit (designer).4E (10) Lam wing yan (overall planning).4E (10) Lam wing yan (overall planning).4E (12) Lee Sze Chui (Information search).4E (12) Lee Sze Chui (Information search).4E (21) Tin Nga Hon (designer).4E (21) Tin Nga Hon (designer).4E (24) Wong Ho Wai (Information search).4E (24) Wong Ho Wai (Information search).4E (27) Chueng Ho Yin (experiment).4E (27) Chueng Ho Yin (experiment).4E (42) Yau Ka Ho (experiment).4E (42) Yau Ka Ho (experiment)

HypothesisHypothesis

Plants need to Plants need to absorb water, absorb water, carbon dioxide and carbon dioxide and light to have a light to have a healthy growth.healthy growth.

Our ObjectiveOur Objective

We’re going to have a experiment to investigate We’re going to have a experiment to investigate the effects of water, carbon dioxide and light the effects of water, carbon dioxide and light intensity to a plants.intensity to a plants.

We expect the experiment can support our We expect the experiment can support our hypothesis and find out the importance (if the hypothesis and find out the importance (if the plants lack for it, what will happened?) of the 3 plants lack for it, what will happened?) of the 3 kinds of substance to the plants.kinds of substance to the plants.

ExperimentExperiment

Now, we prepare 5 different conditons tNow, we prepare 5 different conditons to the plantso the plantsPlant APlant A _ lack of water _ lack of waterPlant BPlant B _ lack of carbon dioxide (covere _ lack of carbon dioxide (covered with a plastic bag)d with a plastic bag)Plant CPlant C _ lack of light (put in a dark roo _ lack of light (put in a dark room)m)Plant DPlant D _ lack of water, CO2, light (put i _ lack of water, CO2, light (put in a dark room & covered with a plastic n a dark room & covered with a plastic bag)bag)Plant EPlant E _ contain water, CO2, light for g _ contain water, CO2, light for growingrowing

ResultsResultsPlant A _ didn’t grow ( lack of water)Plant A _ didn’t grow ( lack of water)

Plant B _ didn’t grow ( lack of carbon dioxide)Plant B _ didn’t grow ( lack of carbon dioxide)

Plant C _ had a poor growth ( lack of light )Plant C _ had a poor growth ( lack of light )

Plant D _ didn’t grow ( lack of water, CO2 and light)Plant D _ didn’t grow ( lack of water, CO2 and light)

Plant E _ good growth ( contain water, CO2 and light)Plant E _ good growth ( contain water, CO2 and light)

ConclusionConclusion

We observed that water, carbon dioxide and light are We observed that water, carbon dioxide and light are important for growing of plants.important for growing of plants.

If a plant lacks of water, it will not grow. It means that water If a plant lacks of water, it will not grow. It means that water is a necessaries for growing. Water provide essential is a necessaries for growing. Water provide essential materials to the plants.materials to the plants.

If a plant lacks of carbon dioxide, it will not grow. It means If a plant lacks of carbon dioxide, it will not grow. It means that carbon dioxide is a necessaries for growing. Carbon that carbon dioxide is a necessaries for growing. Carbon dioxide is a material for photosynthesis. Both of water and dioxide is a material for photosynthesis. Both of water and CO2 is needed to make carbohydrates.CO2 is needed to make carbohydrates.

If a plant lacks of light, it will have a poor growth. It means If a plant lacks of light, it will have a poor growth. It means that light is needed for healthy growth.that light is needed for healthy growth.

PhotosynthesisPhotosynthesis Photosynthesis is a process Photosynthesis is a process

by which carbohydrates are by which carbohydrates are made from simple inorganic made from simple inorganic chemicals using light chemicals using light energy from the sun. It is an energy from the sun. It is an anabolic process. In plants, anabolic process. In plants, carbohydrates are made carbohydrates are made from carbon dioxide and from carbon dioxide and water. Oxygen is released water. Oxygen is released as a by-product.as a by-product.

Carbon dioxide + water Carbon dioxide + water carbohydrates + O2 carbohydrates + O2

During photosynthesis, light During photosynthesis, light is absorbed by chlorophyll.is absorbed by chlorophyll.

The End~