Grade 4 unit 1 lesson 3
- 1. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha1 Elements around us Do you see iron nail?!! Can we extract substance like gold or alminium from this iron nail?! Of course not , Because nail consists of iron only. And can not decomposed into two or more substance. So, we can say that : Iron is an Element. Element: It is the simplest form of matter that can not be analyzed (decomposed) into two substance or more. Some types of matter and elements forming them:
- 2. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha2 Elements composed of molecules that composed of atoms. Elements molecules composed of similar atoms. Elements B : non –metalsA : Metals GasesLiquidsSolidsliquidsSolids Oxygen nitrogen BromineSulphur Carbon Phosphorus MercuryIron Copper Aluminium Gold & silver Lead We will study : metals:-Firstly : properties of metals and non metals:-ic importance of some metals and nonSecondly: econom
- 3. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha3 metals:-Firstly : properties of metals and non
- 4. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha4 Activity >>> to prove shining property of metals: Steps : 1 – bring samples of different elements as: 2 – examine which of them shiny?!! Observation : New iron nails , copper and aluminum spoons are shiny ,,, while coal and sulpher are not shiny. Conclusion: Metals are shiny ,while non- metal are not. Activity :>>>> to show ability of metals and non-metals to conduct electricity. Steps Figures Observation 1 – form an electric circuit connecting graphite (carbon) rod of pencil with circuit. Electric lamp lights. 2 – repeat previous step and replace graphite with piece of aluminium foil. Electric lamp lights. A coin which is made of copper. Electric lamp lights. A piece of sulpher Electric doesn't light. Conclusion: 1 – metals are good conductor of electricity . 2 – non- metals are bad conductor of electricity. G. R : we mustn't approach a nail to an electric source? Because nail is good conductor of electricity .
- 5. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha5 Activity >>> to show ability of metals and non-metals to conduct heat. Steps Figures Observation 1 – bring bars of iron , copper , aluminum and carbon. The piece of wax melts at different periods of time in case of iron , copper and aluminum bar. 2 – put piece of wax at one end of each bar and expose the other end to flame of candle for some time. 2 – the piece of wax doesn't melt in case of carbon bar. Conclusion: Metals are good conductor of heat , while non metals are bad one. Exercise: Arrange the elements in opposite diagram ascending according to their heat conductivity. 1 - ………………………………………. 2 - ……………………………………… 3 - ……………………………………… 4 - ……………………………………….
- 6. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha6 Activity >>> show ability of metals and non metals to be melted. Steps 1 – bring a sample of each of iron nails, copper wires and sulpher crystals. 2 – heat each sample by using a Bunsen flame. Observation: The iron nails and copper wires don't melt, but sulpher crystals melt easily. Conclusion: Metals have high melting point , while non metals have low melting points. Activity >>> to show ability of metals and non metals to be shaped (malleable ) Steps Figure Observation Try to bend or hammer on : Copper wire Piece of coal Sulpher crystals. Iron nail and aluminum wire. Copper wire , iron nail and aluminum wire can be bent. Suphur crystals and piece of coal can not be bent or hammered. Conclusion: Metals can be bent while non metals not. Read and learn : Gold , silver and platinum are flexible, so we add copper to them to easily make jewels. Aluminium metal is used in making aluminium foil which cover chocolate and sweets as it can be bent and hammered.
- 7. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha7 Exercise : Classify the following materials into metals and non metals: Secondly: the economic importance of some metals and non metals: Element Kind Importance Iron Metal Making bridges, car frames and street lights. Aluminium Metal Making cooking pans, foil paper Gold and silver Metal In making jewellery Copper Metal In making electric wires, and metallic coins. Carbon (graphite) Non metal In making positive electrodes (poles) of dry batteries. Wood and plastic Non metal Making handles of cooking pans. Read and learn: Ancient Egyptians fused silver , gold and copper 3000 B. C Some metals have magnetic property such as iron, cobalt and nickel Mercury metal is used in making thermometers. Baber Ibn Hiyan is an Arabian scientist who introduced the experimental researches in chemistry. And discover acids and alkalis. Berzelius is a scientist who discovered rubber tubes, filter paper and some tools used in lab.
- 8. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha8 Comparison between metals and non metals: Points Metals Non metals 1 – luster Shiny Not shiny 2 – malleability Malleable Not malleable 3 – heat conductivity Good Bad 4 – electric conductivity Good Bad 5 – melting and boiling points High Low 6 – state at room temperature. All solids except mercury They are: Solids : like carbon and phosphorus. Liquids as bromine. Gases as oxygen and nitrogen. Glossary Element ﻋﻨﺼﺮ Copper ﻧﺤﺎس Coal ﻓﺤﻢ Natural elements طﺒﯿﻌﯿﮫ ﻋﻨﺎﺻﺮ Artificial ﺻﻨﺎﻋﻰ Molecules ﺟﺰﯾﺌﺎت Metals ﻓﻠﺰات Non metal ﻓﻠﺰات ﻻ Metallic luster ﻣﻌﺪﻧﻰ ﺑﺮﯾﻖ Lead رﺻﺎص Good conductor ﺟﯿﺪ ﻣﻮﺻﻞ Melting point اﻟﺬوﺑﺎن درﺟﺔ Boiling point اﻟﻐﻠﯿﺎن درﺟﺔ Lock ﻗﻔﻞ Samples ﻋﯿﻨﺎت Malleable ﻟﻠﺜﻨﻰ ﻗﺎﺑﻞ Ability ﻗﺎﺑﻠﯿﮫ Replacing اﺳﺘﺒﺪال Coin ﻣﻌﺪﻧﯿﮫ ﻋﻤﻠﮫ Graphite rod اﻟﺠﺮاﻓﯿﺖ ﻣﻦ ﺳﺎق Approach ﯾﻘﺘﺮب Bars ﻗﻀﺒﺎن Flame ﻟﮭﺐ Heat ﺣﺮاره Heat conductivity ﺣﺮاري ﺗﻮﺻﯿﻞ Jewels ﻣﺠﻮاھﺮات Hammer on ﻋﻠﻲ ﯾﻄﺮق Wrapping up ﺗﻐﻠﯿﻒ Flexible ﻟﯿﻦ Car chassis اﻟﺴﯿﺎرات ھﯿﺎﻛﻞ Manufacture ﺻﻨﺎﻋﮫ Statues ﺗﻤﺎﺛﯿﻞ Bridges ﻛﺒﺎرى Doorknobs اﻟﺒﺎب ﻣﻘﺎﺑﺾ Electrodes (poles) اﻟﺒﻄﺎرﯾﮫ اﻗﻄﺎب Thermometers اﻟﺘﺮﻣﻮﻣﺘﺮات Experimental ﺗﺠﺮﯾﺒﻲ Filter paper ﺗﺮﺷﯿﺢ ورﻗﺔ Magnetic property اﻟﻤﻐﻨﺎ ﺧﺎﺻﯿﮫطﺴﯿﮫ Introduce ﯾﻘﺪم Rubber tubes ﻣﻄﺎطﯿﮫ اﻧﺎﺑﯿﺐ Researches اﺑﺤﺎث
- 9. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha9 Questions on lesson: Complete the following statements: 1 – elements are classified into ………………………. . and ……………………………………. 2 - ………………………. . is a liquid non metal , while ………………………… is a liquid metal. 3 – the group of ……………………………. Has metallic luster , but the group of …………………………. Doesn't have. 4 – metals are …………………………. Conductors of electricity , but ………………………. . are bad conductors of electricity except ………………………. 5 – metals are good conductors of ………………………… and ……………………………… 6 – metals have ………………………. . melting points, while non metals fhave ………………………. Melting point. 7 - ………………………… have the ability to be re- shaped, but ………………………… have not. 8 – the positive poles of dry cells are made up of …………………………. . elelment. 9 – copper is used in manufacturing of ……………………………, …………………………. . and …………………………. . 1 0 – cooking pots are made of …………………………………… 1 1 - …………………………. . is used in making bridges, while …………………………. Is used in making electrodes of batteries. 1 2- …………………………… is used in making foil paper, but metallic coins are made up of ………………. Choose the correct answer: 1 – all of the following are metals except ……………………………… A: copper b. carbon c. iron d. aluminium. 2 – iron and copper are considered ……………………………… A: solid metals b. liquid non metal c. gaseous non metal d. liquid metals 3 - ……………………… is the simplest form of matter that can't be decomposed into two substances for more. A: element b. metal c. non metal d. compound.
- 10. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha10 4 – at room temperature, all metals are in solid state except …………………………. A: iron b. copper c. lead d. mercury. 5 - ……………………… is a gaseous non metal . A: bromine b. oxygen c. copper d. iron 6 – non metals exist in …………………………. A: solid state b. liquid state c. gaseous state d. a , b and c 7 – all of the following elements have metallic luster except ……………………. A: iron b. copper c. sulphur d. gold. 8 – an element that is a good conductor of heat and electricity is ……………………………… A: carbon b. oxygen c. iron d. sulphur. 9 – the melting points of the following elements are relatively high except ……………………… A: phosphorus b. silver c. copper d. iron 1 0 – sulpher is non metal because …………………………. A: it is shiny b. it has high melting point. c. it can be bent or shaped. D. it is a bad conductor of heat and electricity. 1 1 – gold and silver is used in manufacturing of ……………………………. A: bridges b. planes. C. jewels d. cooking pots. 1 2 - ……………………… is a non metal which is used in making the positive poles of the dry cells. A: copper b. nitrogen c. carbon d. sulphur. 1 3 – electric wires are made up of …………………………. A: sulphur b. carbon c. copper d. gold. 1 4 – statues are made up of ……………………… A: carbon b . alumimium c. sulphur d. copper. Write scientific term: 1 – elements that haven't metallic luster. ………………………………………. . 2 – elements that are hammered to form sheets. …………………………………………. 3 – elements have low melting and boiling points. ………………………………………. . 4 – a liquid non- metal. …………………………………………. . 5 – an element that is used in making jewellery. ……………………………….
- 11. Science 4th primary. 1st term unit 1 lesson 3 Mr.Ahmed ElBasha11 Give reason for 1 – suphur is considered a non- metal? …………………………………………………………………………………………………………………………………………………… 2 – copper is used in used in manufacture of electric wires? …………………………………………………………………………………………………………………………………………………… 3 – cooking pans are . 3`made up of aluminium? …………………………………………………………………………………………………………………………………………………… 4 – copper is used in making statues and metallic coins? …………………………………………………………………………………………………………………………………………………. 5 – car chassis, doors and bridges are made of metals not of non metals? …………………………………………………………………………………………………………………………………………………. Compare between : Metals Non- metals Mention one use for each of the following: 1 – iron 2 – aluminum 3 – gold and silver 4 – copper 5 – carbon My wishes,