Natural Sciences Grade 7 Term 3 Energy and
![Natural Sciences Grade 7 Term 3: Energy and Change Potential and kinetic energy Natural Sciences Grade 7 Term 3: Energy and Change Potential and kinetic energy](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-1.jpg)
![Topic 2 Potential and Kinetic Energy Potential and kinetic energy in mechanical systems Natural Topic 2 Potential and Kinetic Energy Potential and kinetic energy in mechanical systems Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-2.jpg)
![Potential and kinetic energy in mechanical systems: • Mechanical systems need energy so that Potential and kinetic energy in mechanical systems: • Mechanical systems need energy so that](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-3.jpg)
![Mechanical systems • These are systems in which the input energy involves motors, machines, Mechanical systems • These are systems in which the input energy involves motors, machines,](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-4.jpg)
![Mechanical systems • Energy in cyclist’s body [potential energy] → boy’s legs and feet Mechanical systems • Energy in cyclist’s body [potential energy] → boy’s legs and feet](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-5.jpg)
![Thermal (heating) systems • These are systems in which heat is the input energy Thermal (heating) systems • These are systems in which heat is the input energy](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-6.jpg)
![Thermal (heating) systems • Stove plate [potential energy] → stove’s plate is switched on Thermal (heating) systems • Stove plate [potential energy] → stove’s plate is switched on](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-7.jpg)
![Thermal (heating) systems • A geyser stores heat energy in the hot water. Natural Thermal (heating) systems • A geyser stores heat energy in the hot water. Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-8.jpg)
![Electrical systems • Electrical systems use electrical energy to cause change or to do Electrical systems • Electrical systems use electrical energy to cause change or to do](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-9.jpg)
![Electrical systems Natural Sciences - Grade 7 Electrical systems Natural Sciences - Grade 7](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-10.jpg)
![Electrical systems • The electrical energy flows / moves through the electric circuits and Electrical systems • The electrical energy flows / moves through the electric circuits and](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-11.jpg)
![Sound energy • Anything that makes a noise because it is moving, is an Sound energy • Anything that makes a noise because it is moving, is an](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-12.jpg)
![Sound energy • Examples: car hooter, piano key, baby rattle, gun shot, etc. Natural Sound energy • Examples: car hooter, piano key, baby rattle, gun shot, etc. Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-13.jpg)
![Biological systems • Every living creature needs energy for their digestion and respiration. • Biological systems • Every living creature needs energy for their digestion and respiration. •](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-14.jpg)
![Biological systems • The process photosynthesis enables plants to convert the solar energy to Biological systems • The process photosynthesis enables plants to convert the solar energy to](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-15.jpg)
![Biological systems • The input energy comes from a plant or animal which is Biological systems • The input energy comes from a plant or animal which is](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-16.jpg)
- Slides: 16
![Natural Sciences Grade 7 Term 3 Energy and Change Potential and kinetic energy Natural Sciences Grade 7 Term 3: Energy and Change Potential and kinetic energy](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-1.jpg)
Natural Sciences Grade 7 Term 3: Energy and Change Potential and kinetic energy
![Topic 2 Potential and Kinetic Energy Potential and kinetic energy in mechanical systems Natural Topic 2 Potential and Kinetic Energy Potential and kinetic energy in mechanical systems Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-2.jpg)
Topic 2 Potential and Kinetic Energy Potential and kinetic energy in mechanical systems Natural Sciences - Grade 7
![Potential and kinetic energy in mechanical systems Mechanical systems need energy so that Potential and kinetic energy in mechanical systems: • Mechanical systems need energy so that](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-3.jpg)
Potential and kinetic energy in mechanical systems: • Mechanical systems need energy so that the system’s different parts can move. • Machines and tools can be used to do the work for us. • Potential energy can be changed to kinetic energy in a mechanical system. • All the different parts interact in a mechanism which is based on mechanical principles. Natural Sciences - Grade 7
![Mechanical systems These are systems in which the input energy involves motors machines Mechanical systems • These are systems in which the input energy involves motors, machines,](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-4.jpg)
Mechanical systems • These are systems in which the input energy involves motors, machines, springs, stretched elastics, crane lifting a heavy generator, hitting a cricket ball with a cricket bat, bending a plastic ruler to shoot a small paper ball, a pulley lifting a tin of paint, scissors cutting paper, etc. Natural Sciences - Grade 7
![Mechanical systems Energy in cyclists body potential energy boys legs and feet Mechanical systems • Energy in cyclist’s body [potential energy] → boy’s legs and feet](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-5.jpg)
Mechanical systems • Energy in cyclist’s body [potential energy] → boy’s legs and feet move the pedals → pedals turn the cog and chain → chain turns the rear [back] cog → rear cog turns the wheels → bicycle moves forward [kinetic energy]. Natural Sciences - Grade 7
![Thermal heating systems These are systems in which heat is the input energy Thermal (heating) systems • These are systems in which heat is the input energy](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-6.jpg)
Thermal (heating) systems • These are systems in which heat is the input energy – for example heat from a candle, a burner or a stove. It could also be the transfer of heat from a hot cup of tea to the air as it cools. Natural Sciences - Grade 7
![Thermal heating systems Stove plate potential energy stoves plate is switched on Thermal (heating) systems • Stove plate [potential energy] → stove’s plate is switched on](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-7.jpg)
Thermal (heating) systems • Stove plate [potential energy] → stove’s plate is switched on and heats up → heat of the stove’s plate heats the pot → heat of the pot heats the soup → soup gets hotter and starts to bubble and boil [kinetic energy Natural Sciences - Grade 7
![Thermal heating systems A geyser stores heat energy in the hot water Natural Thermal (heating) systems • A geyser stores heat energy in the hot water. Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-8.jpg)
Thermal (heating) systems • A geyser stores heat energy in the hot water. Natural Sciences - Grade 7
![Electrical systems Electrical systems use electrical energy to cause change or to do Electrical systems • Electrical systems use electrical energy to cause change or to do](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-9.jpg)
Electrical systems • Electrical systems use electrical energy to cause change or to do work. • These are systems in which electricity is the input energy such as a cell, battery or main electricity being used to operate an appliance. • Batteries store electrical energy in the chemicals that are inside the battery. Natural Sciences - Grade 7
![Electrical systems Natural Sciences Grade 7 Electrical systems Natural Sciences - Grade 7](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-10.jpg)
Electrical systems Natural Sciences - Grade 7
![Electrical systems The electrical energy flows moves through the electric circuits and Electrical systems • The electrical energy flows / moves through the electric circuits and](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-11.jpg)
Electrical systems • The electrical energy flows / moves through the electric circuits and it is then transferred to the output devices [bulbs; motors and buzzers]. • A torch battery’s energy moves to the bulb to make the beam of light. Natural Sciences - Grade 7
![Sound energy Anything that makes a noise because it is moving is an Sound energy • Anything that makes a noise because it is moving, is an](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-12.jpg)
Sound energy • Anything that makes a noise because it is moving, is an example of mechanical energy. • Sound energy is the energy produced by sound vibrations as they travel through water, air or any other space. • The sound waves bounce / amplify as it moves. • The sound waves, like the ripples in a lake, become weaker the farther they travel. • The energy of the waves becomes more spread out. Natural Sciences - Grade 7
![Sound energy Examples car hooter piano key baby rattle gun shot etc Natural Sound energy • Examples: car hooter, piano key, baby rattle, gun shot, etc. Natural](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-13.jpg)
Sound energy • Examples: car hooter, piano key, baby rattle, gun shot, etc. Natural Sciences - Grade 7
![Biological systems Every living creature needs energy for their digestion and respiration Biological systems • Every living creature needs energy for their digestion and respiration. •](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-14.jpg)
Biological systems • Every living creature needs energy for their digestion and respiration. • The Sun supplies biological energy and it is stored in the form of chemical energy in plants and animals. Natural Sciences - Grade 7
![Biological systems The process photosynthesis enables plants to convert the solar energy to Biological systems • The process photosynthesis enables plants to convert the solar energy to](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-15.jpg)
Biological systems • The process photosynthesis enables plants to convert the solar energy to chemical energy. Natural Sciences - Grade 7
![Biological systems The input energy comes from a plant or animal which is Biological systems • The input energy comes from a plant or animal which is](https://slidetodoc.com/presentation_image_h/0e7df75c046ff86254157695d9fae880/image-16.jpg)
Biological systems • The input energy comes from a plant or animal which is eaten and it provides the biological energy to the animal or person who is eating. • The energy in the food that you eat is used to change your position when you run, walk, jog or move. • Energy is also used to make you think, breath and sustain all bodily processes. Natural Sciences - Grade 7
Grade 6 natural science term 4
Natural science grade 6 lesson plans term 2
The biosphere grade 7
Grade 7 ns term 4
What is energy grade 7
Human sciences vs natural sciences tok
Natural science grade 7 term 4 notes
Technology grade 7 term 3 notes
Different ecosystems grade 6
Natural science grade 6 term 4
Grade 4 nst term 3 practical task
Natural science grade 5 term 1
Grade 5 natural science
Natural science grade 7
Grade 5 natural science term 1
Natural science grade 6 term 3
Natural science grade 5