Circle of Life Home learning for week beginning
Circle of Life Home learning for week beginning 18/5/20
Your task for this week • Watch the short videos in the links below and make notes on each video. • https: //www. bbc. co. uk/bitesize/topics/zgssgk 7/articles/zwn 6 mnb • https: //www. bbc. co. uk/bitesize/topics/zgssgk 7/articles/zyv 3 jt y • Now follow the rest of this powerpoint for the life cycle of a frog, plant and butterfly. Once you have done this, conduct further research on these different life cycles. Focusing particularly on the similarities and differences between each life cycle.
FROG LIFE CYCLE Frog eggs are laid in a group in the water by a frog. After about 6 -21 days, these eggs hatch into tadpoles.
The tadpole spends its time swimming in the water, eating and growing. Tadpoles have a tail for swimming with. It usually takes them 6 -9 weeks to fully develop as a tadpole, however some types of frogs may take much longer.
Around week 12, the tadpole sprouts legs (and then arms), has a longer body, and has a bigger head. It breathes under the water and still has a tail.
The adult frog breathes air and has no tail. This growth cycle, from egg to frog takes between 12 to 16 weeks.
Video courtesy of Ken Ross(@Youtube. com) - granted under creative commons licence - attribution
Here is the frog life cycle
Some interesting facts Frogs have ears! Males have bigger ears than the females and they can be found behind the eyes. Frogs ‘drink’ through their skin! Frogs are cold blooded and hibernate in Winter. Frogs are amphibians.
SEED DISPERSAL • There are different types of seeds that fall into different categories. • Plants disperse their seeds to ensure their survival.
After pollination has taken place, the flower of a plant will be full of seeds. Its next step is to get rid of these seeds to ensure its survival. In order to get the best chance of survival for future plants, the seeds must be dispersed. What do you think ‘seed dispersal’ means? Why do you think the seeds need to be dispersed?
Plants are rooted to the ground so they need a way to disperse their seeds away from themselves. In other words, they want their seeds to grow new plants in as many different places as possible to ensure that species of plant will survive. Seed dispersal is vital for survival because if a plant can only drop it`s seeds around where it’s growing and a threat arrives then the new plants might not survive. Seed dispersal also makes sure that one area doesn’t become overcrowded. Almost all seeds are made inside fruits. These fruits provide protection and nutrients to the seeds while they are developing.
Think about the types of environments that plants live in including the elements (the weather) and other factors (like animals). How do you think seeds can be dispersed? Text here Text here Types of seed dispersal Text here
Wind Can you think of any seeds that travel by wind? *Hint: Think of flying machines and telling the time
Sycamore ‘helicopters’ and dandelion ‘clocks’ both have fruits which have adapted to use the wind to carry the seeds away when the seeds are ready. Sycamore seeds falling Dandelion seeds being blown by the wind Photos courtesy of @Doug 88888, ian boyd (@flickr. com) - granted under creative commons licence - attribution
Bursting Some plants have pods full of seeds which will burst, showering the ground with seeds, like the Himalayan Balsam seed. Peas are another example of bursting open to disperse its seeds.
Shakers Some plants rely on being shaken to disperse their seeds. When poppies have produced their seeds and have finished flowering all that is left is a long stem with a dried seed pod. These pods have small holes at the top and rely on wind to shake them to scatter the seeds. This method doesn’t send the seeds very far. Yucca Campestris seeds also need to be shaken. Yucca Campestris seeds Poppy seeds Photos courtesy of janerc (@flickr. com) - granted under creative commons licence - attribution
Water Some plants rely on water and to disperse their fruits. These will either grow on the water or by the side of water. Water lilies live on the water so they use the water to disperse their seeds. They make very light seeds which will float away on the water for a while, then sink to the bottom of a pond to grow a new lily. Lily seeds Water lily Photos courtesy of egonwegh(@flickr. com) - granted under creative commons licence - attribution
Palm trees seeds are very light which helps them float and grow another palm tree elsewhere. Palm trees that grow by the oceans drop their seeds which can be swept great distances by the ocean’s Palm tree seeds currents. Coconuts are well known travellers. Willow and silver birch trees often grow near water. Their seeds are very light Willow which enables them to float away on water (the silver tree birch seed is also fluffy seeds which helps them to be dispersed by the wind too). Photos courtesy of Dave_A_2007(@flickr. com) - granted under creative commons licence - attribution
Catching a ride Some plants such as cockleburs have developed to grow tiny hooks on their fruits which hook on to animals (or people) that pass by the plant. Eventually they will drop off on to the ground. This dog has been covered in burs. Burdock seeds Photos courtesy of Gan. Med 64 s (@flickr. com) - granted under creative commons licence - attribution
Seeds as food Some plants make tasty fruits. This is to encourage animals (and people!) to eat the fruits. The seeds then pass through the animal unharmed and out the other end with a ready supply of fertiliser (not tasty in the slightest…quite the opposite). This method ensures the seed is given nutrients to help it grow. What types of fruits can you think of that are eaten by animals and people with seeds inside?
Drop and roll! Some fruits such as horse chestnuts have a casing round them which cracks open when it hits the ground. The fruit inside then rolls away from the tree. You can tell which horse chestnuts in the trees are ripe because their casings have already be gun to split open before they drop. v
Task • Your task is to create a poster identifying the similarities and differences between the life cycles of a plant, insect and animal using research that you have found. • You could present this in a presentation, poster (or more than one poster). • A video of you discussing the similarities and differences of these life cycles is another way of presenting your work. • Send your work to your teacher once you have finished. We would all really like to see what you have discovered.
- Slides: 28