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Yr 9 Photosynthesis Project
Transcript of Yr 9 Photosynthesis Project
How have plants adapted to survive in different habitats?
As you move further away from the equator, the temperature drops steadily, there is less rain and the sun is weaker. It's more difficult for plants to grow but they adapt so that they can live through drought and freezing winters.
Light Intensity experiment.
We investigated the effect of light intensity on the rate of Photosynthesis.
Here were the results:
All plants Photosynthesize in all different ways, whether they live in the desert, woodland or a rainforest but these are the things that plants need to photosynthesis which are: Carbon dioxide, water and light. These are the things that they make by Photosynthesis which are: Glucose and Oxygen.
I can show Photosynthesis in a word equation:
Carbon dioxide + water (+ sunlight) glucose + oxygen.
6 CO2 + 6 H20 C6 H12 06 + 02.
Distance from light source
Number of bubbles
It shows that the shortest distance from the light source has more light which would photosynthesize and it had the most bubbles but the longest distance has 15 bubbles are less light so it wouldn't be able to photosynthesize.
Cactus don't have any leaves because they live in the desert, the leaves would just crunch up. The cactus has adapted to its habitat and still able to photosynthesis.
Rainforest plants have big leaves and are very dark green, they are darker because they need more chlorine.
Desert and Rainforest
About the African desert:
The Sahara Desert, located in the north of Africa, covers an area of about 3,600,000 square miles, making it the third largest desert in the world. Temperatures in the Sahara can often reach 136 F, or about 57 C. The total rainfall is less than three inches per year.
Despite being one of the driest and hottest places on earth, the Sahara Desert is home to an estimated 500 species of plants and about 70 species of animals.
Plants in the Desert
And lot's more!
Adaption of the plants in the Desert
Plants adopt the desert environment are those that are drought dormancy in that they are able to hold water like cactus that need less water. Another plant is the succulent plant like cactus that store water in fleshy stems, leaves or roots. Other plants have annual life span so they direct all their energy into bearing seeds.
Woodland is a low-density forest forming open habitats with plenty of sunlight and limited shade. Woodlands may support an understory of shrubs and herbaceous plants including grasses. Woodland may form a transition to shrub land under drier conditions or during early stages of primary or secondary succession. Higher densities and areas of trees, with largely closed canopy, provide extensive and nearly continuous shade and are referred to as forest.
Plants in the UK Woodland
And lot's more!
Adaption of the plants in the UK Woodland
What is Photosynthesis?
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by product.
How are plants adapted for Photosynthesis?
Plants are wide and flat to create a large surface area and to absorb as much light as possible, leaves are very thin so gases can reach cells easily, they are also lots of tiny holes called stomata. On their underside through which gases go in and out, they also have lots of veins called xylem that carry water to the cells and phloem that carry glucose away.
How are plants varied?
Plants tend to differ from each other. This is mainly because they come from different groups:
Plants have two main groups, vascular and non-vascular. These two groups split into four different groups, Bryrophytes (mosses), Pteridophytes (fems), Gymnospems (Pines, conifers) and Angiospems (flowering plants).
Some plants are differemt because of their habitat. For example, plants in the UK are quite delicate and they aren't poisonous. However, if you went to the Amazon Rainforest then the plants would be big, colourful and poisnous
If a plants habitat was destroyed then the plant itself would die out unless it can quikly adapt to its new environments.
Plants in the Amazon Rainforest
Brazil Nut Tree
And lot's more!
Adaption of the plants in the Amazon Rainforest
Evergreen woodlands such as pine forests contain very few and very specialised understory plants because of the constant shade and very dry conditions at ground level.
Deciduous woodlands generally have a wider range of plants, but they are often ephemerals adapted to grow during the times when the trees are without leaves. Spring ephemerals are often bulbs or other summer dormant plants that are prepared to make rapid growth during the brief period of sunlight before the trees grow leaves, which is also a time of high water availability after winter. In summer, the trees reduce the water reaching the ground and their roots dry out the soil.
The Amazon rainforest is the largest tropical rainforest in the world, covering over five and a half a million square kilometres (1.4 billion acres). 10% of the world’s known species live in the Amazon rainforest.It is home to around 2 and a half million different insect species as well as over 40000 plant species. While the protection of the Amazon rainforest remains an issue, deforestation rates have been reducing while areas of conserved land have been increasing over the last 10 years.
More than two thirds of the world's plant species are found in the tropical rainforests: plants that provide shelter and food for rainforest animals as well as taking part in the gas exchanges which provide much of the world's oxygen supply. Rainforest plants live in a warm humid environment that allows an enormous variation rare in more temperate climates: some like the orchids have beautiful flowers adapted to attract the profusion of forest insects.
Structure of a leaf!
A leaf is made up of a variety of layers. The top layer, the cuticle, is waterproof and helps reduce the amount of water a leaf loses through evaporation. The next layer is the upper epidermis which is just a single layer of cells that light goes straight through. The middle layer is called the palisade layer, where the mesophyll cells exist, and they contain chloroplasts which are key to photosynthesis. The lower epidermis is a thin layer that has a large number of holes, called stomata, that allow gases to move in and out of the leaf.