State 3 types of renewable amp 3 types of non renewable energies What do all forces do Give 2 examples of contact amp noncontact forces Explain why you have categorized each of the energies as renewable amp nonrenewable ID: 1042864
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1. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failureState 3 types of renewable & 3 types of non renewable energiesWhat do all forces do. Give 2 examples of contact & non-contact forcesExplain why you have categorized each of the energies as renewable & non-renewableWhat is meant when a chemical reaction conserves mass?What are the 3 states of matter?Give 2 properties of each.
2. Topic: Energy Cost & TransferHow many kJ of energy is used by a 1kw heater used for 15minutes?Topic: Evolution & InheritanceName an animal variation that may be BOTH environmental & inheritedTopic: Contact Forces and PressureForces may change 3 things on an object. What are these?Topic: Chemical energy & Reactions A reaction between calcium & sulphuric acid makes hydrogen gas & what else?Write a word equation for the reaction.Topic: Respiration & PhotosynthesisWhat 4 things are needed for photosynthesis to occur? Topic: Climate & Earth ResourcesWhat are the advantages & disadvantages of using fossil fuels?Challenge: Describe the difference between an exothermic & endothermic reaction
3. Challenge: Explain how you know what kind of reaction these areFriday, 05 March 2021Chemical energy & chemical reactionsIdentify the changesState the reaction typesKey word boxChemical reactionAtoms Physical change Change of stateReactantsProductsExothermicEndothermicReaction ProfilesWAGOLL:Group with reasoning the pictures
4. Materials can change in different ways.Melting is an example of a physical change.Physical changes can be undone quite easily.
5. Burning is an example of a chemical change.Chemical changes are harder to undo.Often chemical changes cause a change in colour.
6. What is a chemical reaction?What is a physical changeChemical reaction – a change in which atoms are rearranged to create new substances, usually irreversiblePhysical change – a change that is reversible, in which new substances are not made. E.g. boiling, dissolving. Give an example of a chemical reaction & a physical change.
7. 05/03/2021Group into physical & chemical changes
8. Physical ChangeChemical ChangeCan easily be undone. No new material is formed.Change in stateCannot easily be undone.New materials formed that are different to the starting materials Colour changeBubbles given offHeat or light given off
9. chemical reaction, reversible, atoms, catalyst, temperature, sound, physical change →ReactantsProduct(s)A chemical reaction is a change in which atoms are rearranged to create new substances
10. chemical reaction, reversible, atoms, catalyst, temperature, sound, physical change +→??ReactantsProductsA chemical reaction is a change in which atoms are rearranged to create new substances
11. Adding acid to alkaliFireworksDriving a carIce cream meltingBoiling the kettlefrying an eggBurning a candleMelting candle waxDissolving sugar in teaLighting a matchMaking ice cubesIroning clothesPrintingBaking a cakeLaunching a space rocketDecide which of these are chemical reactionsxxxxxxxThe changes that are not chemical changes are called physical changes
12. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failureDescribe what is meant by exothermic & endothermic reactions. State an example of eachDraw energy profiles for both reaction typesExplain what is meant by the activation energy of a reactionAnnotate the energy profile diagrams
13. Reactions - ExothermicEnergyActivation EnergyPRODUCTSREACTANTSProgress of the reactionReaction has lost energy – exothermic!
14. Reactions - EndothermicEnergyActivation EnergyPRODUCTSREACTANTSProgress of the reactionReaction has gained energy – endothermic!
15. What makes reactions happen?Reactions need two things in order to happen:They need to collideThey need to have sufficient energyACTIVATION ENERGY!!!
16. Explain why the activation energy is always higher.Describe what needs to happen in a reaction for products to be madeExplain what causes a reaction to be endothermic or exothermic in terms of bondsCHALLENGE
17. Breaking reactant bonds /Making product bondsBreaking bonds is endothermic(Making bonds is exothermic)
18. Reaction profileEnergyActivation EnergyPRODUCTSBreaking bondsProgress of the reactionMaking bonds
19. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failure
20. Write the word equation for the reactionWrite a balanced symbol equation for the reactionDescribe what happens to methane and oxygen for water and carbon dioxide to be made. CHALLENGEStretch: include information about what happens to the bonds in each of the compoundsMethane is a compound made of 1 carbon atom and 4 hydrogen atoms.Methane is the gas that comes out of the gas taps in the science labs. When methane gas is reacted with oxygen, carbon dioxide and water are produced along with heat energy (exothermic).
21. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failure
22. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failure
23. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failure(a) (i) oxygen-oxygen or O–O1(ii) Answers may be in either ordercarbon-oxygen or C–Oaccept ‘oxygen–carbon’do not accept ‘carbon dioxide’1hydrogen-oxygen or H–Oaccept ‘oxygen–hydrogen’do not accept ‘water’1(b) any one from• heat is producedaccept ‘the reaction is exothermic’• the temperature goes updo not accept ‘energy is released’1[4]
24. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failureTodays lessonLastLast lessonLast lessonComplete the following questions about our learningIdentify a similarity & difference between exothermic & endothermic reactions.State an example of each typeSuggest an explanation for how a particular evolutionary change occurredExplain, in terms of energy, why a bouncing balls cannot go on forever.
25. Friday, 05 March 2021Success is the result of preparation, hard work and learning from failureExplain differences between chemical & physical changes.Give 2 examples of eachDraw the particle arrangement in a solid, liquid and a gas Describe what happens to the particles when objects change state Name the key features of an animal and plant cell (include a diagram)Suggest how a root hair cell is specialised fro its function
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