Year 8 Science Work Pack Phase IV Part B 8 Science Work Pack Phase... · giants. These mammoths...

Year 8 Science Ark Globe Academy

Remote Leaning Pack Phase IV – Part B

Monday8thJune–Friday19thJune

Session Title Worktobecompleted

Resourceprovided Outcome On-LineSupport

1 B2.3Inheritance

Task1-DONOWTask2–readingandquestions

PhaseIVWorkbookwithtasksPage3

Completed:1.DONOW2.readingandquestions

B2.3AdaptationlessonvideoonVLE

2 B2.3Inheritance

Task1–FillintheblanksTask2–ExamquestionTask3-Applyquestion

PhaseIVWorkbookwithtasksPages4-5

1.Fillintheblanks2.Examstylequestion3.Applytask

Seeabove

3 B2.3NaturalSelection

Task1-DONOWTask2–readingandquestionsTask3-CheckforUnderstanding


Completed:1.DONOW2.readingandquestions3.CheckforUnderstandingTask

B2.3CompetitionlessonvideoonVLE

4 B2.3NaturalSelection

Task1–ExamquestionTask2Applyquestion


1.Examstylequestion2.ApplyTask

Seeabove

5 B2.3Extinction Task1-DONOWTask2-CheckforUnderstandingTask3–readingandquestions


Completed:1.DONOW2.CheckforUnderstandingTask3.readingandquestions

B2.3VariationlessonvideoonVLE

6 B2.3Extinction

Task1–ExamquestionTask2–readingandquestions


1.Examstylequestion2.readingandquestions

Seeabove

7 B2.3LST1

Task1-DONOWTask2-LST

PhaseIVPartBWorkbookwithtasksPages3-4

Completed:1.DONOW2.LSTandmarked

B2.3LST1lessonvideoonVLE

8 B2.3LST2

Task1–DONOWTask2LST


1.DONOW2.LSTandmarked

B2.3LST2lessonvideoonVLE

9 B2.3Diagnostic

Task1-DONOWTask2-Diagnostic


Completed:1.DONOW2.Diagnosticandmarked

B2.3DiagnosticlessonvideoonVLE

10 B2.3ScientificReading

Task1–readingandwritingaletter


1.ApplyTask–writingaletter

B2.3ScientificReadinglessonvideoonVLE

L7 – LST 1

Task1: Do Now

Complete the questions below (answers are on the lesson video on the VLE):

1.) List 3 things that plants need to survive. 2.) What is the word equation for photosynthesis? 3.) What is the word equation for respiration?

Stretch: What is meant by the term adaptation? How is a cactus adapted to survive?

Task 2: LST – 10 minutes

Spend 10 minutes revising material on adaptation from workpack 3 before spending 10 minutes completing task 2 -the LST. Once completed mark your answers using the mark scheme on the accompanying lesson video found on the VLE.

Key questions to revise:

• Why do animal compete for resources? • What do animals compete for? • What do plants compete for? • Why are adaptations useful in animals? • What is variation? • What is the difference in inherited characteristics and environmental

characteristics?

L8 – LST 2

Task1: Do Now


1.) Write out these bullet points in the correct order: • Those organisms best adapted with an advantageous characteristic will

survive and reproduce passing on their genes. • There is a change in the environment that causes competition. • Over many, many generations, the characteristic becomes more common in

the species. • There is variation in a species

Stretch: Describe the contents of the nucleus of a cell. Using the words: chromosome, DNA, genes, forty-six

Task 2: LST – 10 minutes

Spend 10 minutes revising material on adaptation from this workpack – workpack 4 before spending 10 minutes completing task 2 -the LST. Once completed mark your answers using the mark scheme on the accompanying lesson video found on the VLE.

Key topics to revise:

7: Inheritance 8: Natural selection 9: Extinction

L9 – Diagnostic

Task1: Do Now


1.) Look at the two cells below, What parts do they have that are the same and what are their functions?

Stretch: List as many specialised cells as you can

Task2: Diagnostic

Read the information below and then spend 10 minutes revising specialised cells and the definition of adaptation from workpack 3 before spending 10 minutes completing task 2 -the diagnostic. Once completed mark your answers using the mark scheme on the accompanying lesson video found on the VLE.

Question: State two specialised animal cells and two specialised plant cells

and explain how they are adapted to carry out their functions. (6 marks)

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L10 – Scientific Reading Complete this reading below, using the glossary when needed, using this information and your own knowledge to complete task 1.

A pre-recorded reading of the information has also been included in the slides.

Word Definition Prehistoric A time in the past before history was recorded Egyptian Pharaohs

An ancient Egyptian King

Ancestor A living thing from which one is descended. Example: I am an ancestor of my great great grandfather

Carcasses The dead body of an animal Immune system A system in a living organism that protect the living thing from

diseases Herbivores An animal that eats only herbs and grasses – an animal that

does not eat meat Darwin v Doudna: Who was the greatest scientist?

Darwin In 1831, aged 22, Charles Darwin set off on a five-year voyage around the world. He was fascinated by the variety and distribution of wildlife and fossils he discovered. After much thought, Darwin devised the theory of natural selection to explain his observations. The theory proposes that:

• Individuals of a species that are best adapted to their environment survive. This is the survival of the fittest.

• The survivors reproduce and pass on their favourable characteristics to their offspring. This is natural selection.

• Over many generations, natural selection results in new species.

Doudna Jennifer Doudna was born in 1964. She worked with others to create a gene-editing technique called CRISPR. CRISPR allows scientists to cut genes out of DNA molecules, or even to add new ones. The technique could enable scientists to control the future of evolution.

Should extinct species be brought back to life? Over the last 500 years, human actions have caused the extinction of over 800 species. Extinct species include the Dodo, Tasmanian Tiger, woolly mammoth and Quagga. Extinct species can now be bought back to life if their DNA is preserved. In theory we could give dinosaurs and dodos a second chance. But should we? The giant creatures of the prehistoric world, such as the dinosaurs, saber-toothed tigers and woolly mammoths, continue to intrigue our imaginations. However, some of these creatures were not as ancient as we think them to be. Though no man ever saw a living dinosaur during his lifetime, the woolly mammoths, for instance, did in fact roam the face of the Earth even as the Egyptian pharaohs were busy building the pyramids of Giza, and for some time thereafter. What Were Woolly Mammoths?

The woolly mammoths are the ancestors of Asian elephants. The discoveries of frozen carcasses and body parts of these elephant-like creatures in Siberia and Alaska, as well as the depiction of these animals in ancient cave paintings, have allowed scientists to extensively study the appearance and behaviour of these giants. These mammoths were roughly the size of present day African elephants, and were well adapted to living in the Ice Age conditions of their time. They had two layers of fur cover and short ears and tails to remain protected against frostbite. They were also herbivores like the present day elephants, and lived on a diet of grasses and hedges.

When Did They Become Extinct?

The mammoths completely disappeared 4,000 years ago from the Wrangel Island, several centuries after the constructions of the pyramids at Giza. Scientists believe that the woolly mammoths were killed due to the warming up of the environment and due to humans moving into their habitats, killing the creatures for their meat and using their bones and tusks to make human dwellings, tools, and artwork.

But How Does It Work? Every single living thing is made of DNA. DNA is the building block of life, the code — essentially — that all carbon-based lifeforms read in order to function. From the 20th century onward, humans have been able to not only read and see the code of life but change it and edit it to our liking. This process, although once expensive became much more exciting with the development of CRISPR-Cas-9.

CRISPR-Cas9 is developed from the DNA editing immune system in bacteria. You see, when bacteria get infected by viruses (yes they do get sick 😷), they capture snippets of DNA from the invading virus, known as CRISPR arrays. If the virus attacks again, the bacteria “remembers it”, and can then cut the DNA of the virus apart, killing the virus. Scientists can reprogram the CRISPR-Cas9 system in bacteria. They can then edit or change the DNA of species to whatever they want to.

Now — let’s say you — for whatever reason, wanted to revive an extinct species. To do that, you would first have to collect the extinct species’ DNA from bone/fossil samples and then you would have to find a living relative and insert the extinct DNA into it. Which is exactly what scientists have been trying to do. George Church, a geneticist at Harvard Medical School, plans to insert the mammoth DNA extracted from ancient bones into the Asian elephant.

Task 1: Respond to the following question by writing a letter to the scientists.

Question: Should we bring extinct species back from the dead? Your task is to write a letter to the Scientists currently trying to insert the ancient DNA of Woolly Mammoths found in bones into Asian Elephants to bring back the Woolly Mammoth. In your letter you are to explain your reasons for or against the research. You should include some information from this article to support your points, showing that you understand what a woolly mammoth is and you should include some points of your own based on what you have learned in this topic so far on the potential dangers of introducing a new species to an environment.

• Think about the cost of this research - Should we be spending money on protecting and helping endangered species instead.

• Think about the ecosystems that already exist. Could this Woolly Mammoth be a new predator? What does it eat?

• Think about what could happen if we took this technology too far. What if scientists wanted to start changing human DNA.

Sentence Starter:

Dear Scientists,

I am currently a student at Ark Globe Academy where I have just learned about evolution and natural selection. I have just read an article on your plans to bring back Woolly Mammoths from extinction. I think that this is a good/bad idea because….

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Year 8 Science Work Pack Phase IV Part B 8 Science Work Pack Phase... · giants. These mammoths...

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Transcript of Year 8 Science Work Pack Phase IV Part B 8 Science Work Pack Phase... · giants. These mammoths...