Besides that, students are also required to state the energy conversion<\/strong> that occurs in an object\/equipment in order for the equipment to function. Most students typically do not encounter much difficulties in such questions. The challenge usually arises when the students are asked to explain the reasons behind the energy conversion<\/strong>.<\/p>\n In this article, I will discuss the two main components of Energy Conversion<\/strong>:<\/p>\n Part 1:<\/strong><\/span>\u00a0Stating Energy Conversions: How Does Energy Convert From One Form To Another<\/strong><\/a><\/p>\n Part 2:<\/strong><\/span>\u00a0Explaining The Reasons Behind Energy Conversions<\/strong><\/a><\/p>\n <\/p>\n Before I dive deeper into energy conversion, let us do a recap on the 6 key forms of Energy, which are:<\/p>\n When we look at questions testing on the conversion of energy, we need to bear this important rule of energy in mind:<\/p>\n It means that the total energy (of any forms) in a system always remains the same<\/span>.<\/p>\n <\/a><\/p>\n Let us take a look at a few examples to gain a better understanding of energy conversion.<\/p>\n <\/p>\n Before a torch can function, we need to place batteries in the torch. Why?<\/p>\n Batteries contain\u00a0chemical potential energy<\/em> in the batteries, which can be\u00a0converted to electrical energy<\/em> in the wires of the torch.<\/p>\n Lastly, the electrical energy<\/em> in the wires is then converted to light energy<\/em> in the bulb of the torch.<\/p>\n In summary, the main energy conversion in a torch is:<\/p>\n <\/p>\n At a height, the ball possesses gravitational potential energy<\/em>.<\/p>\n Gravitational potential energy (GPE)<\/strong> is dependent on:<\/p>\n 1) Height<\/strong><\/span>: The greater the height it is from the ground, the greater amount of GPE<\/em> possessed by the object\/person<\/p>\n 2) Mass<\/strong><\/span>: The greater the mass of the object\/person, the greater amount of GPE<\/em> possessed by the object\/person<\/p>\n When the ball is falling towards the ground, the gravitational potential energy<\/em> that it possessed is gradually converted to kinetic energy<\/em> (moving energy). Thus, as the ball falls, the amount of gravitational potential energy<\/em> decreases while the amount of kinetic energy<\/em> increases. As the ball is falling midway, it possesses both kinetic energy<\/em> and gravitational potential energy<\/em>.<\/p>\n When the ball hits the ground, there is friction between the surface of the ball and the ground, causing heat and sound to be produced. Hence, the kinetic energy<\/em> of the ball is converted to heat energy<\/em> and sound energy<\/em> to overcome friction between the surface of the ball and the ground.<\/p>\n In summary, the main energy conversion in a falling ball is:<\/p>\n With this information, let us take a look at the question below!<\/p>\n <\/p>\n Source: Henry Park Primary School \u2013 2014 P6 Science Preliminary Examination Paper [Q42]<\/em><\/p>\n In this question, an electrical circuit was created using a lemon, a nail, some wires, and a light bulb.<\/p>\n Lemon is a type of food and possesses chemical potential energy<\/em>.<\/p>\n The chemical potential energy<\/em> in the lemon will then be converted to electrical energy<\/em> in the wires.<\/p>\n The electrical energy<\/em> in the wires will then be converted to light energy<\/em> in the bulb, causing it to light up. In the process, the bulb will also feel hot as some of the electrical energy<\/em> is converted to heat energy<\/em>.<\/p>\n NOTE<\/strong>:\u00a0The function of a bulb is to produce light. Thus, light energy must be written before heat energy.<\/p>\n<\/blockquote>\n Hence, the answer is:<\/p>\n While stating the energy conversion in an object, many students tend to get confused between the \u201c+\u201d symbol and the \u201c\u2192\u201d symbol.<\/p>\n Does your child when to use the \u201c+\u201d symbol and the “\u2192\u201d symbol?<\/p>\n <\/p>\n We use the \u201c+\u201d symbol when the two types of energy are occurring at the same time<\/strong>.<\/p>\n On the other hand, we use the \u201c\u2192\u201d symbol when one type of energy is converted to another type of energy or transferred to another object<\/strong>.<\/p>\n Let us look at the energy conversion in a TV in order to better understand the above definitions.<\/p>\n <\/p>\n When we turn on the switch, electricity would flow from the electrical mains to the wires in the TV. The TV is now turned on and we will be able to see images<\/u> on the TV screen and hear sounds<\/u> from the speakers at the same time<\/strong>.<\/p>\n Since the source of energy is from the electrical mains, the first type of energy would be electrical energy<\/em> from the electrical mains. This electrical energy<\/em> will then be transferred to the wires in the TV. Thus, we use the symbol \u201c\u2192\u201d to illustrate that.<\/p>\n The electrical energy<\/em> in the wires would then be converted to BOTH light energy<\/u> on the screen so we can see the images and sound energy<\/u> in the speakers so we can enjoy our television programme. As such, we use a \u201c+\u201d symbol for light energy<\/em> and heat energy<\/em>.<\/p>\n Thus, the full conversion of energy in a TV would be:<\/p>\n <\/a><\/p>\n In this section, I’ll sharing the reasons behind certain energy conversions, with reference to the following questions.<\/p>\n <\/p>\n Source: Beacon Primary School \u2013 2014 P6 Preliminary Examination Paper [Q2]<\/em><\/p>\n <\/p>\n This question requires students to compare the GPE<\/em> and KE<\/em> at Points A and D.<\/p>\n GPE<\/em> at Points A and D<\/strong><\/span>: Eunice is at a greater height at Point A than Point D. Hence, the GPE<\/em> possessed at Point A is greater than the GPE<\/em> possessed at Point D. This means that the GPE<\/em> at Point D is lesser<\/strong> than the GPE<\/em> possessed at Point A.<\/p>\n KE<\/em> at Point A and D<\/strong><\/span>:\u00a0At Point D, most of the GPE<\/em> of Eunice at Point A has been converted to KE<\/em> at Point D. Hence the KE<\/em> at Point D will be greater<\/strong> than the KE<\/em> at Point A.<\/p>\n Thus, the answer for this question would be Option 1<\/strong>.<\/p>\n <\/p>\n Source: Methodist Girls’ School (Primary) \u2013 2012 P6 SA1 Science Examination Paper [Q43]<\/em><\/p>\n <\/p>\n For Part (A)<\/strong><\/span><\/p>\n The petrol in the car possesses chemical potential energy<\/em>, which is then converted to kinetic energy<\/em> of the car when it moves.<\/p>\n Thus, the answer to this part is:<\/p>\n Chemical Potential Energy\u00a0\u2192 Kinetic Energy<\/strong><\/p>\n<\/blockquote>\n Most students would find this part relatively easy!<\/p>\n For Part (B)<\/strong><\/span><\/p>\n The car now moves up the slope with the same speed<\/strong>.<\/p>\n The term, “same speed<\/strong>“, implies that the speed of the car remains constant and will not affect the energy changes.<\/p>\n As compared to travelling on a straight road, driving up a slope will cause the car to gain gravitational potential energy<\/em>. This would mean that more chemical potential energy<\/em> is now needed to convert into more kinetic energy<\/em> as some of the kinetic energy<\/em> is required to convert into gravitational potential energy<\/em>.<\/p>\n Hence, the answer for part b(i) would be:<\/p>\n The petrol consumption of the car increases.<\/p>\n<\/blockquote>\n As for the explanation for part b(ii), it would be:<\/p>\n When the car travels up a slope, more chemical potential energy from the petrol is required to be converted to more kinetic energy to travel the same distance. This is because some of the kinetic energy of the car is converted to gravitational potential energy as the car moves up the slope unlike travelling on a straight road. Hence, more petrol is needed to drive up a slope as compared to moving on a straight road.<\/p>\n<\/blockquote>\n <\/p>\n I hope this article has provided a comprehensive guide to the energy conversion in an object\/equipment. Now, you should be able to better differentiate when to use the \u201c+\u201d symbol and the \u201c\u2192\u201d symbol, and also to provide explanations behind energy conversions.<\/p>\n Stay tuned for more articles!<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”CCI” _builder_version=”4.16″ custom_margin=”0px||” custom_padding=”0px||” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ custom_padding=”|||” global_colors_info=”{}” custom_padding__hover=”|||”][et_pb_divider color=”#898989″ _builder_version=”4.16″ locked=”off” global_colors_info=”{}”][\/et_pb_divider][et_pb_image src=”https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/The-Pique-Lab-CCI-Science-Course-CTA.png” align=”center” align_tablet=”center” align_phone=”” align_last_edited=”on|desktop” admin_label=”CCI” _builder_version=”4.16″ z_index_tablet=”500″ global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.16″ text_font=”||||||||” text_text_color=”#333333″ text_font_size=”18px” text_orientation=”center” global_colors_info=”{}”]<\/p>\n If you like our methodology, we’ve some upcoming workshops:<\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.16″ text_font=”geomanist-medium||||||||” text_text_color=”#f44a4a” text_font_size=”18px” text_orientation=”center” global_colors_info=”{}”]<\/p>\n P4 Complete Concept Integration\u2122 Science Course<\/strong><\/a> [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" <\/p>\n","protected":false},"author":6,"featured_media":246131,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","om_disable_all_campaigns":false,"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[10,6,3],"tags":[],"post_folder":[],"modified_by":"Jaimie Aberia","_links":{"self":[{"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/posts\/1342"}],"collection":[{"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/comments?post=1342"}],"version-history":[{"count":15,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/posts\/1342\/revisions"}],"predecessor-version":[{"id":244525,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/posts\/1342\/revisions\/244525"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/media\/246131"}],"wp:attachment":[{"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/media?parent=1342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/categories?post=1342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/tags?post=1342"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/thepiquelab.com\/blog\/wp-json\/wp\/v2\/post_folder?post=1342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
Read Also<\/span><\/h2>\n
\n
Background Information<\/span><\/h2>\n
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\u201cEnergy cannot be created or destroyed. It can only be converted from one form to another.\u201d<\/strong><\/h3>\n<\/blockquote>\n
Part 1: Stating Energy Conversions: How Does Energy Convert From One Form To Another<\/h2>\n
Example 1: Torch<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/01\/Energy-Conversion-In-A-Torch.png\")
<\/p>\nExample 2: A Ball Is Dropped From A Height To The Ground<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/01\/Energy-Conversion-In-A-Falling-Ball.png\")
<\/p>\nHere’s A Question:<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/question.png\")
<\/p>\n\n
![\"Energy](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/Energy-Conversion-In-A-Lemon.png\")
<\/p>\nThe Use Of Symbols: \u201c+\u201d & \u201c\u2192\u201d<\/span><\/h2>\n
Energy Conversions In A Television Set<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/Energy-Conversion-in-A-TV-1.png\")
<\/p>\n![\"Energy](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/Energy-Conversion-in-A-TV-2.png\")
<\/p>\n![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/Energy-Conversion-in-A-TV-3.png\")
<\/p>\nPart 2: Explaining The Reasons Behind Energy Conversions<\/h2>\n
Here’s A Question<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/2014_Beacon_P6_SA2_Q30.png\"){kind=tracking}
<\/p>\nTo Tackle The Above Question:<\/span><\/h2>\n
Let’s Have A Look At Another Question:<\/span><\/h2>\n
![\"\"](\"https:\/\/thepiquelab.com\/blog\/wp-content\/uploads\/2019\/05\/2012_MGS_P6_SA1_Q43.png\")
<\/p>\nHow We Tackle The Above Question:<\/span><\/h2>\n
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In Conclusion<\/span><\/h2>\n
P5 Complete Concept Integration\u2122 Science Course<\/strong><\/a>
P6 Complete Concept Integration\u2122 Science Course<\/strong><\/a><\/p>\n