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Our science topic Prezi!

Covering: habitats, adaptation, food chains, plants & photosynthesis.
by

John Kenyon

on 26 March 2012

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Transcript of Our science topic Prezi!

Our science topic:
Parts of a plant;
Plant growth;
Food chains;
Animal habitats;
Adaptation.

Parts of a plant:
The roots of a plant have two functions:
1) To anchor the plant in the ground;
2) They absorb water and nutrients from the soil.
The stem also has two jobs:
1) To hold the plant upright (like the trunk of a tree!);
2) It transports nutrients, minerals and water around the plant.
Stems:
The leaves are hugely important to the plant!
They contain a green substance called chlorophyll which allows the plant to create its own food - this is called photosynthesis...
Leaves:
Photosynthesis is the name for the process which plants use to create their own food.
- It is where the plant takes the energy from the sun, water from the soil and carbon dioxide from the air and turns it into food for the plant - clever!
- This process also produces oxygen, which the plants release into the air - really important for us human beings!
Photosynthesis:
Flowers are the reproductive organs of the plant:
- They help the plant to reproduce in a number of ways:
1) They produce pollen, which can be spread by insects (the colouful petals and perfumes attract them!);
2) They produce seeds, which can be spread by the wind, explosion, by animals (yes, sometimes in their poop!), or by other methods...
Flowers:
Plant growth:
Watch how these seeds grow into plants!
So plants needs the following things to grow...
1) Light;
2) Water;
3) Nutruients & minerals (food!);
4) Carbon dioxide.
Food chains:
All living things need energy in order
to survive - everytime you do something (run, jump, blink!) you use energy.
Living things get energy from food. We already know that plants create their own during photosynthesis.
Humans & animals get their energy from the food they eat.
A food chain shows how energy is passed from creature to creature, as they are eaten. All food chains start with green plants and end with human or animal life.
Some important words you need to know...
Producer - the plant that produces the energy.
Consumer - the things that do the eating!
Herbivore - an animal that eats only plants.
Omnivore - an animal that eats plant and other animals.
Carnivore - a meat-eating animal.
Animal Habitats:
A habitat is a place where a collection of plants and animals live and which provides them with food and shelter.

Seashores, gardens and ponds are all examples of habitats. Habitats can be big (a jungle, for example) or small (a leaf, for example).
What animals need from their habitat:
1) Shelter from predators and the weather.
2) Oxygen - from the air or in the water.
3) Food - plants or other animals must be eaten to gain energy.
4) Space - so the food doesn't run out!
Adaptation:
Animals and plants adapt to their environment - this means they have developed special features to help them survive.
Eg - an African elephant has large ears that it flaps to keep in cool! And a polar bear has thick fur to keep it warm!
How Silver Rabbit has adapted!
1) Longs ears for excellent hearing - helps to avoid predators;
2) Fantastic sense of smell - to find food;
3) Powerful back legs - fast running and kicking!
4) Whiskers help him tell if he can fit through small spaces!
4) Claws for digging burrows/escaping from Mr K's garden;
5) Fur for warmth in winter;
6) Will stretch out to keep cool in the summer!
Can you tell me how these animals have adapted to their environments?
Any questions?
Full transcript