In Year 6/7 Science we have been looking at cells using light microscopes. The image above shows cells from a spring onion, stained with methylene blue, to show cell walls and nuclei. Cells are all different shapes and sizes, but the cell theory states:
- All living organisms are made up of cells
- Cells are the basic organisational units of life
- All cells come from pre-existing cells
Before the end of term we will be having a test on Classsification and Cells. You will need to know the following:
- What are five characteristics of living organisms? (usually require oxygen; require nutrients; produce wastes; respond to stimuli; reproduce themselves)
- How are living organisms classified? Five Kingdoms – Animals, Plants, Fungi, Bacteria (Monera) and Protists.
- What is a dichotomous key? A branching key used to classify organisms into groups, using questions with only two answers – yes or no.
- Name the parts of a light microscope.
- What are three important things about cells (the cell theory).
- What are the three main differences between animal cells and plant cells.
Students in years 6/7 and 8 will be completing a science test before the end of term, to assess their learning in this first part of the year. In Year 6/7 you will need to know the following:
- Safety rules for science experiments
- Laboratory equipment – Identify, label and draw
- States of matter (Solids, Liquids and gases) and the Particle Theory
- Water Cycle (label evaporation, condensation, precipitation etc)
- Heat Moves (convection, conduction and radiation)
You can use your netbooks to do some revision by going to the FUSE site and typing the Resource Package code: Y4B8TT into the search box. Can you explain, in terms of the particle theory, what happens to the aluminium can in this video? After the test we will be going on to do a unit of work on “Separating Mixtures”. You can see a Voicethread about the different ways to separate mixtures here and another one here.
Year 8 Students can use the Resource Package code: 9WTEHH to do some revision on atoms, molecules, elements and compounds. You will need to know the names and symbols of the first twenty elements, the properties of metals and non-metals and some examples of common molecules, compounds and mixtures (for example, table salt is NaCl, carbon dioxide is CO2 and water is H2O). After the test, in Year 8 we will be going on to do a unit on “Chemical Reactions” (comparing changes of state, or physical reactions, to chemical reactions). Check out ourVoicethread about Physical and Chemical reactions.
Some of you may be interested in collaborating with a class in the U.S.A. who are doing a project about the Science of the Olympics. You will work with students from Mrs Laguna’s class on a wiki. Let me know if you would like to extend your learning in this way.
Congratulations on your performances in the NAPLAN testing last week – you all approached the tasks in a mature and responsible fashion and I am sure your results will reflect your knowledge of literacy and numeracy. Remember this is just one measure of your learning and there are many ways you can succeed at school apart from high scores on these tests, including public speaking, sporting achievements, art work, community involvement and team-work.
This week many of you will be participating in our Open Night for students and parents in Grade 6, considering our school for next year. Thank you for your thoughts and comments on what sets Hawkesdale P12 College apart – many of you had very many postive ideas about our small class sizes, choice of elective subjects, country atmosphere and supportive teachers.
In Science this week you will be choosing one of two options – research for the 2009 Victorian Landcare Youth Environment Conference to be held in Lorne in early August, OR an animal project about a Victorian threatened species. The list of animals you can choose from is here. All the suporting documents (Student task sheet, assessment rubric and research grid) are available on the year 7 wiki.
Photos sourced from Flickr (CC) and saved in Irfanview.
After five weeks of term studying atoms and elements, molecules and compounds, the periodic table and the carbon cycle, we are ready for our first test. Make sure you revise all of Chapter 2 thoroughly and complete the “Summing Up” section at the end of the chapter. You will be required to memorise the first twenty elements of the periodic table (names and symbols), which will be worth 20 points. This will be of great assistance for science in future years. You can use the mnemonic “Little Betty Boron Chews Nitrogen On Friday Nights” and “NaMgAl SiPS Chlorine Ardently” to help you remember most of the first twenty.
You will also need to know the three different forms of Carbon – as shown above, Diamond, Graphite and Charcoal.