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KEYWORDSForm 41 Body coordination includes the _____________ system and the ______________system. (Koordinasi badan).

2 Neuronesare cells specialized to generate and transmit nerve _____________.There are 3 types of neurones, _________________ neurone, ___________________and

_________________ neurone. (Tiga jenis neuron).

3 The path taken by an impulsein a reflex arc (Laluan impuls dalam tindakbalasrefleks) :

4 ______________________ are important in maintaining body balance andcoordination.

5 Voluntary actions are under the control of the _____________ and are doneaccording to ones _______________ .

6 Involuntary actions are under the control of the _____________ and are done NOTaccording to ones _______________

7 Drugs are chemical substances that may cause _______________ and negativeeffects on our _______________ and _______________ activities

8 Geneis a unit of _________________ composed of __________ that determine the____________ of an individual.

9 A __________________is a thread-like substance found in the nucleus of a cell.

10 Mitosisis the type of cell division which occurs in ____________ cells. It produces______ identical daughter cells with the _______ number of chromosomes of themother cells.

11 Meiosisis the type of cell division which produces ___________ that contains_______ the number of chromosomes of the mother cells.

12 Inheritancethe passing down of particular ________________ from generation togeneration.

13A dominant geneis expressed in the ____________ even if it is present together

with recessive gene,

14A recessive genewill only shows its effect in the ____________ if the dominantgene is___________.

15_____________ is a sudden random change in the structure of a gene or achromosome which will cause changes in the characteristics of an organism

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16 Variationsare differences among individuals in a population of the same________________.

17 Matter(jirim ) can exists in 3 states : ___________ , ___________ and_________ .

18 Kinetic theory of matter explains the ____________ states of differentphases in terms of molecular movement:Solidshave molecules with the ___________ kinetic energy and are the __________to one another. Liquid molecules have _____________ kinetic energy and are

__________ apart to one another. Gasmolecules have the _____________ kineticenergy and are the __________ apart to one another.

19 A change in state occurs during the processes of _______________ , ____________,_______________ , ____________________ and ____________________

20An atom is made up of _____________ , _______________ and _______________ .

21 Proton numberis the total number of ____________ and ____________ in an atom.

22 Nucleon numberis the total number of ____________ and ____________ in anucleus.

23 Isotopesof the same element are atoms having the same__________ numberBUT different___________ number.

24 Substancesmay be classified as ____________ ( all solids except mercury ) and_______________ .

25 Substances can be made up of __________ , ______________ or ______________ .

26 An _______ is the smallest particle of an element that can take part in a chemicalreaction.

27 A ______________ is formed when two or atoms are combined chemically.Simple molecules are held by weak ___________________ forces. e.g :___________Macromolecules are held by strong __________ bonds.e.g : ____________________

28 Ionsare formed when electrons are _____________ ( negative ions ) or ________(positive ions ) from a neutral atom.

29 Ionic compoundsare very stable with ions arranged in orderly __________ latticeheld by strong ____________________ forces.

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30 Periodic Tableis a table which arranges elements in an increasing ___________________________ to show the ___________________ of elements with related electronicconfigurations.

a._____________ are vertical columnscontaining elements with similar___________ properties and _____________ of electrons in the outer electronicshell.

b._____________ are horizontal rowscontaining elements that changefrom metallic properties to ___________________ properties.

31A puresubstance contains only one type of __________ or _____________A puresubstance has a fixed _____________ and ____________ points. Presence ofimpuritieswill _______________ the melting point and ________________ the boilingpoint.

32 Impurities present can be removed by physical means (Methods ofPurification / Kaedah Penulenan ) like _____________ , _______________,

_____________________ and ______________________.

33A physical changeis a change which DOES NOT result in _______ substancesformed and can be _______________ by changing the conditions.

34A chemical changeis a change which involves a _____________ reaction resultingin ________ substances.

35An endothermic reaction is a reaction whereby heat is _________________ causinga __________in temperature of the surrounding.

36An exothermic reaction is a reaction whereby heat is __________________ causinga ___________ in _____________________of the surrounding.

37 Reactivity series ofmetalsis a list of metals arranged with the ________reactive metals at the top and the ________ reactive metals at the bottom.a. The series is constructed by reacting the metals with ___________ ,

____________ and ________________.b. The series can be used to predict the method of _________________ ofmetals from their ores.

38 Electrolysisis the process of decomposing of an ___________________ by passingan _______________ current.

39 Electrolytesare _________ compounds that can conduct electricity when _________or in _________________ .

40 Industrial application ofelectrolysisincludes :a. ______________________ of metalsb. ______________________ of metalsc. ______________________________

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41 Radioactivity is random and spontaneous breakdown of _____________ nuclei intonuclei of other stable elements accompanied by the ______________ of sub-atomicparticles called __________ particles and __________ particles. Electromagnetic rayssuch as ____________ rays may also be emitted.

42 Nuclear _________ takes place when two light nuclei combineto form a biggernucleus.

43 Nuclear _________ takes place when a heavy nucleus breaksup into smallernuclei.

44 Light dispersion is the splitting up of __________light into its component _______.Example of a natural phenomenon ___________________

45 Light scattering is a process where light is ______________ and spread byparticles of __________ or ___________. The phenomenon of ______ sunset is causedby the scattering of light

46 (i) __________coloursare colours that cannot be produced by mixing othercolours.Examples : _______________ , _________________ and _______________(ii) ______________colourscolours obtained by mixing primary colours.Examples : _______________ , ________________ and _______________

47An alloy is a substance that is formed when some pure ___________ or______________ is added into another pure metal when they are in a ___________state.Examples : ___________ , _____________

48 Superconductoris a type of ________ that allow electric current to flow with nearzero ___________________.