Year+8+Trust+Science+(2011-2012)

=Unit: Reproduction=

For the answer of the worksheet, please refer to.

Please choose one of the following statements and write an essay (about 500 words) on that. In the essay, you are expected to show your point of view (agrees or disagree) and explain that with reasons (scientific reasons). Please do the essay in groups.

1) Having sexual activities in water can kill the sperms and so reduce the probability of being pregnant. 2) If the male do not drink any coffee, the taste of sperm will become sweeter. 3) The peak of level of reproductivity for male is at the age of 18 while that for female is at the age of 28. 4) Female standing for about 30 minutes after the sexual activity can reduce the chance of being pregnant. 5) I don't have any sexually transmitted infection such as HIV because I am a virgin. 6) The sexual ability is affected by the size of penis after the expansion. The bigger the penis the greater the sexual ability he would be. 7) A pregnant woman cannot have any sexual activities as the development of the baby will be negatively affected. . 8) It is common that female has pain in the reproductive organs and even when they piss after the 1st sexual activity. 9) A woman will be pregnant if she swallows any sperms. 10) Girls will not get pregnant after this is their first sexual activity.

Finish the essay in the lessons on 19 June, 2012 and submit it on 21 June, 2012.

** AOI: Environment **
 * Unit Two-****Taking care of our planet**

Unit Question: How can we continue to use natural resources to maintain our standard of living? Significant Concept: Mindless consumption and neglect of the environment will lead to eventual downfall of societies.

Summative Assesment

**Unit 2: Taking care of the environments Unit 3: Tracking Changes Throughout History**

**AOI: Environments AOI: Environments**

**//Assessment criteria: C – Knowledge and Understanding//**

**Topics: Energy, Metal Task: Written Test**

**Date: 5 June 2012 (Summative Assessment Week) Time allowed: 90 Minutes**

//Grading Criteria//

0 || Potential Scientist 1 – 2 || Promising Scientist 3 – 4 || Super Scientist 5 – 6 ||
 * **Criteria** || **Struggling Scientist**
 * **C**
 * Knowledge and Understanding** || **Task not submitted** || I **attempt** to describe some energy transfer.

I **attempt to** perform some calculations involving speed, weight, kinetic energy, potential energy, work, power, and efficiency.

I show **limited** understanding of acid, alkali, pH, and neutralization.

I show **limited** understanding of the properties of metals, metal reactivity series, and metal reaction with acid. || I can describe **some** energy transfer.

I can perform **some** calculations involving speed, weight, kinetic energy, potential energy, work, power, and efficiency.

I can use **some** correct units in the answers.

I show **some** understanding of acid, alkali, pH, and neutralization.

I show **some** understanding of the properties of metals, metal reactivity series, and metal reaction with acid. || I can **describe** energy transfer and **draw** Sankey (energy transfer) Diagrams.

I can perform **calculation** involving speed, weight, kinetic energy, potential energy, work, power, and efficiency.

I can use **correct** units in the answers.

I show **good** understanding of acid, alkali, pH, and neutralization.

I show **good** understanding of the properties of metals, metal reactivity series, and metal reaction with acid. ||

Bring //Pen,// //Pencil,// //Eraser,// //Ruler, Calculator//


 * The following equations will be provided in the test:**

Work = Force x Distance

Potential energy = Mass x Gravity x Height

Kinetic energy = ½ x Mass x Speed2

Power = Work / Time



Students are give a set of revision exercise. The e-copy is For the answer of the set of questions on Chemical Reactions and Energy, please refer to.

__ASSESSMENT __ There will be a essay-writing in an assessment of the unit. The essay will be assessed on criteria A and B (please refer to the rubrics). There will be THREE parts in the assessment schedule. __Part 1 Introduction and Planning__ will be held in Science class on __8 May, 2012__; Do the ** Part 2 Writing and Part 3 Final submission ** at home and then submit your work via turnitin no later than 15 May, 2012, 1:50 pm. __Submit the paper copy of the essay and bibliography on 15 May, 2012.__

The topic of the essay will be announced on the first day of assessment. Citation and bibliography has to be provided and student may use EasyBib to make the bibliography. Students have to submit their work to [|Turnitin]. __**Late work will not be accepted.**__



Concepts included in the ENERGY 1) Calculating Kinetic Energy (Unit 21a and Worksheet) **Kinetic Energy (J) = 1/2 X Mass (kg) X Speed square (m/s)**

2) Calculating Gravitational Energy (Unit 21a and Worksheet) **Gravitational Energy (J) = Mass (kg) X Gravity (9.8 or 10) X Height (m)**

3) Calculating Weight and work done (worksheet)
 * Energy or work done (J) = Force (N) X distance moved (m) **


 * Weight (N) = Mass (kg) X Gravity (10) **

4) Calculating Power (worksheet) **Power (W) = Energy or Work done / time taken (in seconds)**

5) Energy transfer and efficiency (Unit 21a, 21d and Worksheet) Efficiency = (useful energy transferred / total energy) X 100%


 * Energy Transfer Diagram (Sankey diagram) **

6) Different sources of Energy(Unit 21b, 21c and 21e) Unit 21b - Energy from sun Biomass also called biofuel (how it was formed) Solar energy (how it is applied in daily life) Unit 21c - Non-renewable energy sources Fossils fuels, eg coal, crude oil and natural gas (how they were formed) Nuclear power (good or bad?) Global view of electricity production Unit 21e Renewable sources of energy Geothermal energy, Wind energy, Wave energy, Hydro-electric energy and Tidal energy


 * Homework **
 * Do the questions on Worksheet **
 * 1) Work and energy, Q (1-5) **
 * 2) Power Q(1-6) **
 * 3) Energy Transfer Q (2-6) **


 * Submit your work to me on 3 May. 2012 **

Research on different sources of energy
 * Group || Sources || group work ||
 * Au Yeung Hon*, William Yuen and Ivan Ho || Hydro Drams || [[file:Hydro power.pptx]] ||
 * Lam Wing Man*, Jason Yip, Tiffany Yen,Mandy Wan || Solar || [[file:Solar Energy.ppt]] ||
 * Edward Tsui*, NBJ, Sean Li, Nina Liu, Miranda Tang || Nuclear || [[file:NE 1.pptx]] ||
 * Roy Ng*, Kenneth Law, Ken Kung, Jason Yu || Thermal || @http://youtu.be/FTlfPoxLa0U ||
 * Derek Yeung *, Kenneth Chan, Henry, Mark, Earnest || Wind || [[file:Windmill Project.ppt]] ||
 * Kathleen Chan*, Jasmine Ng, Yscilla S., Ange Wong, Christina Lau || Bio Mass || [[file:Biomass .pptx]] ||

Exercises on Gravitational Energy


 * Please finish the Questions 7-10 on the Gravitational Energy and submit your answer to me on 19/4/2012. **

Formula of calculating Gravitational Energy

**Gravitational Energy (J) = Mass (kg) X Gravity (9.8) X Height (m)**

Gravity refers to a //free //- //<span style="background-color: #ffffff; color: #dd4b39; font-family: arial,sans-serif; font-size: small;">fall acceleration //<span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;"> which is //<span style="background-color: #ffffff; color: #dd4b39; font-family: arial,sans-serif; font-size: small;">Free falling //<span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;"> object //<span style="background-color: #ffffff; color: #dd4b39; font-family: arial,sans-serif; font-size: small;">accelerates //<span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;"> at a constant 9.8 m/sec. You can also use 10 m/sec for easy calculation.

Using the formula to find the Height <span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">For example, if an object weighs 1000 kg was dropped on the ground, the Gravitational Energy of it is 3230J. Find the Height in terms of meters.

**According to the formula, Gravitational Energy (J) = Mass (kg) X Gravity (9.8) X Height (m)**

**Thus, 3230 J = 1000 Kg X 9.8 X Height**

**Height = 3230J / 1000kg / 9.8**

**Height = 0.33 m (corrected to 2 significant figures)**

Using the formula to find the Mass <span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">For example, if an object was dropped from the top of cupboard which is 0.33m high on the ground, the Gravitational Energy of it is 3230J. Find the Mass of the object in terms of kg.

**According to the formula, Gravitational Energy (J) = Mass (kg) X Gravity (9.8) X Height (m)**

**Thus, 3230 J = Mass X 9.8 X 0.33m**

**Mass = 3230J / 0.33m / 9.8**

**Mass = 998.76 kg (corrected to 2 decimal places)**

Using the formula to find the Gravitational Energy <span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">For example, if an object weighs 1000kg was dropped from the top of cupboard which is 0.33m high on the ground. Find the gravitational energy it generated.


 * According to the formula, Gravitational Energy (J) = Mass (kg) X Gravity (9.8) X Height (m) **


 * Thus, Gravitational Energy = 1000kg X 9.8 X 0.33m **


 * Gravitational Energy = 29696.97 J (corrected to 2 decimal places) **

Please finish the Questions 7-10 on the Gravitational Energy and submit your answer to me on 19/4/2012.

Ken's group: @http://youtu.be/FTlfPoxLa0U

Form yourselves in small groups one type of energy and have them research how we turn that type into electricity. Each group present their generator/device with a picture in PPT or video and should describe which type of energy comes in and how it changes step by step to electricity. Show the good and bad impact of that kind pg energy globally Present your group work on 17th April, 2012.. Allocation of different groups
 * Research on Electricity**

Au Yeung Hon*, William Yuen and Ivan Ho- Hydro Drams Lam Wing Man*, Jason Yip, Tiffany Yen,Mandy Wan- Solar Edward Tsui*, NBJ, Sean Li, Nina Liu, Miranda Tang - Nuclear Roy*, Kenneth, Ken, Jason Yu - Thermal Derek*, Kenneth Chan, Henry, Mark, Earnest - Wind Kathleen*, Jasmine, Yscilla, Angel, Christina - Biomass

=**Unit One – Taking care of ourselves and others**= <span style="color: #000000; font-family: 'Courier New',Courier,monospace;">AOI: Health and Social Education

<span style="color: #000000; font-family: 'Courier New',Courier,monospace;">Unit Question: How does lifestyle relate to your physical well-being and the well-being of others?

<span style="color: #000000; font-family: 'Courier New',Courier,monospace;">Significant Concept: Taking care of ourselves is taking care of the next generation.

Date: 8 March, 2011 <span style="color: #000000; font-family: 'Courier New',Courier,monospace;">Energy, Chemical reactions and Electricity

1. Watch this video: OK Go - This too shall pass

2. Find out about "Rube Goldberg Machines"

3. In a group, design your own.

4. Find out the laws of energy.

5. Find out the different forms of energy.

POWERPOINT on the PLANTS at WORK ==
 * Topic: Plants at Work ( Spotlight Science 8 P.145-P.158)**

Important concepts of the topic Photosynthesis (Respiration in plants) Leaves structure (especially the air holes(stomata), chlorophyll Vs chloroplast, differences between upper side and underside) Plant growth (elements they need, control of growth, how gravity affects growth) Plant plumbing(waterways, factors affect the speed of water transport) Pollination (male (staman) and female (carpel) cells of flowers and their functions, insect pollination, self-pollination and cross-pollination) Making seeds (Fertilisation, seeds and babies)

Students have to do all the experiments on he worksheet and understand how the plants eat, drink, breathe and reproduce. They have to show the understanding in the worksheet.

Each group should prepare a PowerPoint to answer the questions. 1) Do plants eat? 2) Do plant drinks? 3) Do plants breathe? 4) Do plants have babies?

The presentation will be held on 28/2 (tue) during science lesson.

[|Assessment: Investigating the Effect of Exercise on Heart Rate]
**// D – Scientific Inquiry, //** **// E – Processing Data, //** **// and F – Attitudes in Science //**
 * **// Assessment criteria: //**

** Topic: The Effect of Exercise on Heart Rate ** ||  ||   ||   || investigate the effect of exercise on heart rate. You will also need to write a full lab report to show your findings.
 * **//Task://** In this task, you will design and carry out an experiment to

You will be given **two double periods** to do the experiment and write the lab report. A lab report template will be provided for you. || 14/2 || -Write the design section (aim, hypothesis, material, method, diagram) of the lab report - A partner will be randomly assigned to you, and you will carry out each other’s experiment ||  ||
 * || 16/2 || Finish writing lab report ||  ||

Please follow the guidelines below when you plan your experiment.

- You need to change your independent variable **five times** - Remember to allow **resting time** between tests - Total experiment time should **not exceed 20 minutes** - If you require any special equipment, you need to **make your own arrangement in advance** - Your experiment must be **SAFE**, and will **not cause harm** to any person or the environment

You will need to bring sports shoes, and if you wish, PE uniform on 14/2 for carrying out the experiment. You will also need to bring a regular calculator and stationery to the assessment for drawing graphs. You will not be allowed to use phones, music players or computers with calculator function. Attachments: [|Heart Rate rubric.docx]

Holiday Assignment, Please design an experiment on testing the effect of exercise on heart rate. You may take a reference of the following document.

Dear all, Do the correction of 1) Breathing for respiration 1 2) Gas exchange

You may refer to the answer below for your correction.

You need to hand in your correction before the end of lesson on Tuesday (17/1/2012). Do the Quiz 2 (45 minutes) and submit before the end of lesson on Tuesday (17/1/2012)

Do the peer assessment on your classmates videos and submit the the forms to me on 7th Feb, 2012(Tue). Here is the peer assessment form.

Submission of Christmas Break Assignment and Edward Tsui || http://www.youtube.com/watch?v=VlSw5xVWni8&feature=g-upl&context=G28a5216AUAAAAAAAAAA || and Jason Yip || ====== http://www.xtranormal.com/watch/12881394/pawz-movie ====== || Yscilla Sjauw || http://www.xtranormal.com/watch/12878032/independent-and-dependent-variables || and Roy Ng || ====== http://www.xtranormal.com/watch/12868709/voodooz-movie ====== || Derek Yeung || http://www.xtranormal.com/watch/12883555/call-of-healthy || Tiffany Yen || http://www.youtube.com/watch?v=4bSu9a4-Mr0&feature=youtube_gdata_play || and Jasmine Ng || http://www.xtranormal.com/watch/12897555/independent-and-dependent-variables-in-science-lesson || and Ivan Ho || ====== http://www.youtube.com/watch?v=Zdmmqe7cu0Q ====== || Can those students who did not sent the link to me, please send me an email with your video link as soon as possible. Otherwise, your grade in criterion B will be negatively affected.
 * Students Name || Video link ||
 * Au- Yeung Hon
 * Kathleen Chan || http://goanimate.com/movie/0NiOHOHLpu-U/1 ||
 * Kenneth Chan || http://www.youtube.com/watch?v=XUaSmwcZva4&context=C31744c7ADOEgsToPDskJrn2d3qWscr17lFFYEbfuH ||
 * Nicholas Jacobsen || http://www.xtranormal.com/watch/12897878/science-independent-and-dependent-variables ||
 * Ken Kung ||  ||
 * Henry Lai ||  ||
 * Lam Wing Man
 * Christian Lau,
 * Kenneth Law
 * Sean Li ||  ||
 * Nina Liu ||  ||
 * Miranda Tang ||  ||
 * Mark Tong ||  ||
 * Ernest Tse and
 * Ernest Tse and
 * Mandy Wan and
 * Angel Wong
 * Jason Yu ||  ||
 * William Yuen

====[|Christmas Break Assignment (Criterion B - Communication and Criterion D - Scientific Inquiry)]====


 * Learning about Independent and Dependent Variables**

1. Go to the following link and watch the video as many time as it takes for you to understand what independent variables and dependent variables are.

Independent and Dependent Variables @http://www.youtube.com/watch?v=DK9-B3beRc8

2. Go to @http://www.xtranormal.com/ to sign up for an account where you can make a cartoon!

3. Either on your own or with a partner(2 people in a group), create a similar video to demonstrate your understanding of independent and dependent variables using **THREE** real life examples, one of which MUST be about the effect of exercise on the human body.

Week 16 and 17, 5/12/2011 - 15/12/2011

Making Lung Model

In groups of 3-4, build a working model of the human lungs, and produce a short video to document your creation with voice over to describe the materials used in making the model lungs, how your model represents the various parts of the respiratory system, and how your model shows the process of breathing. Don't forget to put your names of the group member in the video. Do not make your video longer than 5 mins.

Date of Presentation: 15/12/2011 Submission: Send the link of the video to ms cheung's email (catherinecheung@vsa.edu.hk) before the presentation. Venue: Chem Lab, 9/F


 * ANSWER THE FOLLOWING QUESTIONS in your science note-book. Some of the answers will come from your research of making a lung model.**

Answer the questions: 1. What is this process called? 2. Where does this process take place? 3. What is C6H12O6? 4. How do we obtain it? 5. How does it get to the location mentioned in “Question 2”? 6. How do we get the O2? 7. What do we do about the CO2? 8. What do we do about the H2O? 9. What do we do about the “Energy”? 10. What are the “6”’s for? 11. Rewrite the equation using words.
 * “C6H12O6 + 6 O2** ** --> 6 CO2 + 6 H2O + Energy”**

Date of Presentation: 15/12/2011 Venue: Chem Lab, 9/F

Date: 24/11/2011 Dear all, Well done in the presentation. Here is the Digestive System Note. Please take a look and revise it. Especially the highlighted parts.

Besides, Here are another digestive note and the answer of quiz 5 for your revision.

For the details of the summative assessment, please click[| Summative Assessment]

For your revision, you may take the quiz 6 by yourself. The answer of Quiz 6 is.

You can also refer to this notes. This is also useful for your assessment.

Cheers, Ms. Cheung

Date: 10/11/2011 Quiz 2 on Food Nutrition and Digestion Experiment: The effect of amylase on starch Venue: Chem Lab

Quiz Content: Digestion: The definition of digestion, the name and function of the digestive enzymes and the process of carbohydrates, proteins and fats digestion Food nutrition: Knowledge on Reading Food labels, functions of carbohydrates, proteins and fats

Homework: Lab-report of the experiment (include hypothesis, discussion and conclusion, stick the data in the science note-book) Answer the questions on WS in Science note-book Submission Date: 15/11/2011

Date: ** 15/11/2011 ** Venue: Chem Lab

**Quiz 3 on Food Nutrition and Digestion** Content Digestion: The definition of digestion, the name and function of the digestive enzymes and the process of carbohydrates, proteins and fats digestion, the effect of amylase on starch food sources and functions of carbohydrates, proteins and fats

Experiment: The effect of protease on protein

Group Activity **Digestive and Absorption note-Making**

Join this Google group: [] You should have received an invitation in your school email inbox. You can simply sign in with that email. Then, access the following document: @https://docs.google.com/document/d/1n0yuMwqBaCfOhPXAOUSImxc9grJocmmHCUp6MfAnrxQ/edit?pli=1&hl=en_US

If you signed in with a non-school email address, you will have to request access to the document and wait for my approval.

Please do the activity according to the list of group in. Do the research according to the guiding questions. Guiding questions What is the function, structure and position of the organs? What are the names of the organs? (if any) Are they used for digestion or absorption? What kinds of nutrients are digested or absorbed in the organs? (describe and illustrate the process) Can human live without that organ? Why? (give valid reasons to support your idea)

Do not forget to show the difference of the two organs and how they are connected to the other organs. You must do the referencing correctly. Do your work in the Google document! @https://docs.google.com/document/d/1n0yuMwqBaCfOhPXAOUSImxc9grJocmmHCUp6MfAnrxQ/edit?pli=1&hl=en_US

Deadline and the presentation date of the Digestive and Absorption note-Making :** 22/11/2011 **

Date: **17/11/2011** **Quiz 4 on Food Nutrition and Digestion and Digestive system** Experiment: Making a model gut Venue: Chem Lab Quiz Content: The definition of digestion, the name and function of the digestive enzymes and the process of carbohydrates, proteins and fats digestion, the effect of amylase on starch, the position of the digestive organs

F ood sources and functions of carbohydrates, proteins and fats

Date :** 22/11/2011 ** **Quiz 5 on Food Nutrition, Digestion and Digestive system**

Venue: Chem Lab

Quiz Content The definition of digestion, the name and function of the digestive enzymes and the process of carbohydrates, proteins and fats digestion, the effect of amylase on starch, the position of the digestive organs F ood sources and functions of carbohydrates, proteins and fats
 * Presentation of Digestive and absorption system **

Date: **24/11/2011** **NO Quiz** Experiment: Making a model gut

Venue: Chem Lab

In this unit, you are going to design and make a poster ** contrasting how two nations' diets are reflected by its cultural, economic and environmental factors **, etc.

Besides, you have to ** state the sources of nutrients **,
 * composition of food groups in relation to the food pyramid guide and**
 * the stage of the food processing **.

Y8 Trust Poster Deadline: 4/10/2011 Presentation: 4/10/2011

Assessment Rubrics





Grade 8 Science