1. http://www.bbc.co.uk/schools/gcsebitesize/design/resistantmaterials/materialsmaterialsrev1.shtml Hardwood and Softwood You have probably heard people talking about two different kinds of wood - hardwood and softwood. Surprisingly, these names have almost nothing to do with how hard or soft their woods are! .Hardwood trees get their name because of their cellular structure when seen under a microscope - not because they are hard to cut. Softwoods do not have this same hard cellular structure Many times, softwoods are harder than hardwoods!——————————————————————————————right0Hardwood comes from deciduous trees. Deciduous trees lose their foliage in the fall. The main hardwood trees are ash (Fresno), beech (haya), birch (abedul), cherry (cerezo), elm (olmo), oak (roble), mahogany (caoba), teak (teca) and sapele. They are expensive and we can manufacture quality furniture450786542545———————————————————————————Softwood comes from evergreen trees, needle-leaved Evergreen trees keep their foliage all year. Some examples are fir and pine They are cheaper and lighter than the hardwood and they have less resistance. VOCABULARY: HARDWOOD SOFTWOOD DECIDIOUS TREES EVERGREEN TREES FOLIAGE LOSE NEEDLE- LEAVED ASH BEECH BIRCH PINE FIR TEAK CHERRY ELM MAHOGANY OAK SAPELE EXERCISES ABOUT WOOD 1. Complete the picture with heartwood and sapwood. If you look at the cross-section of a tree trunk, many times you'll see a dark region, called 4175760146685the heartwood and a lighter, outer region called the sapwood. The sapwood is live wood and its main job is to carry water from the roots to other parts of the tree. The heartwood is dead wood, but it used to be live sapwood! The heartwood's main job is to provide support for the tree. Heartwood also helps the tree by being resistant to insect attacks and decay. 2. Complete the picture with earlywood and latewoodright0The reason there are two colours in a growth ring is because they are actually two different types of wood! The light wood is known as earlywood because the tree makes it in the early spring. The dark wood is called latewood because the tree makes it in the late summer. 3. Complete Wood is a ____ material formed by _____________: __________is a natural______ that supports a tree. It’s like its ________ ________it makes wood harder and more rigid, it’s like _______ that holds the cellulose together. 4. Classify these types of woods in their correct group and translate into Spanish. Mahogany AshBeech BirchCherryElm OakTeakFirPine HARDWOODSOFTWOODTRANSLATE 5. Open your book at page ……..and copy the table about hardwood and softwood. Write some of their principal uses. Raw materials are obtained directly from Nature (they may be animal, vegetable or mineral)Manufactured materials are materials which have been transformed by human person. 6. Read the following explanation and do the exercise. Classify the following materials as raw o manufactured materials. MATERIALCLASIFICATIONWOODRaw (vegetable)GLASSWOOLPLASTICCUPPER MINERALIRONPAPER IRON COTTONSAND 7. Find some properties of wood and join them with their meaning. PROPERTIES OF WOOD D Z M Y B U M Z D P F L D O S T D Q P E K X V N E E I Z F Q I V C Z H Q J T S L R U Y V M Z L U H J U G N E A X U K X E W K K S I S X B I N L X R T C H Y P D C O B O J R M H S A M Y M K Z Z V Y A F T F U X P E P K I P D I Y W Y Y K D N M R K U S M W W E F L C A I M K R I V U R I H J E C N A T S I S E R T R O F F E Y C E X P P H I F N E O S R G T T I C U T A G E U I G Q S H N U E Z T E U E M N I L T A I S V U C E G V D Q J N D G C E L I X O W X L T H R I D P M C C G O H W I N M D U A N M Q R Y O C Y A U M R I Y B S P P T G D R D R E C Y C L A B L E B A U N O V Q H D P P E G D A A N G C Q K E L R Q G T N N Q Q N H D Z E N X H P L L A Y D K U E N E F W Z U T O F K H G S L T P O O X L O T S J C T Z S L U V I L A O N S N X A D Z Y S S T J K V F R L V M R C V U S Y T W E U X R I Y Y N H Y R F O BIODEGRADABLE EFFORT RESISTANCE ELECTRICALINSULATOR MALLEABILITY RECYCLABLE SOUNDDRIVER THERMIC INSULATOR TOUGHNESS 8. In our blog, you can find a file called Tools Table. You must find out tools for working wood. Copy and draw them. http://www.woodmagic.vt.edu/html/kids.htm http://puzzlemaker.discoveryeducation.com/WordSearchSetupForm.asp