Grade 4 | Science | Unit 3 - Concept 1 - Lesson 1 - Mars rover скачать в хорошем качестве

Grade 4 | Science | Unit 3 - Concept 1 - Lesson 1 - Mars rover

Welcome dear students! What types of energy transformations are required for sunlight to operate devices? • Most devices depend on electricity, and to generate electricity, we can convert the energy of the Sun in different ways. • Different devices can convert the light energy that comes from the Sun into different forms of energy such as in solar powered calculator, the solar cells change the energy of sunlight (solar energy) into electrical energy which is used to operate the calculator. Energy in remote-controlled cars : • Many toys such as cars, trucks, planes, boats and small robots may operate remotely. • However, all of these toys need energy to move and perform activities like spinning in the corners and moving forward or backward remotely. How do those toys get energy ? 1) Batteries inside the toys are the resource of chemical energy that is converted into electrical energy. 2) The electrical energy is converted into kinetic energy and sound energy to move the toys and make them perform their activities. But, what do we do when the batteries of these toys run out ? • Batteries can be recharged by connecting the device to a nearby charger. • Or, by replacing the old batteries with new ones. Mars exploration rover: • Mars is about 54 million kilometers away from Earth, so the spacecraft will take about six months to go that distance. • In the last few years, humans have sent many missions to Mars. None of these missions included people, but they had vehicles or robots which are operated remotely. • The "Mars rover Curiosity" is one of the most well-known of these robots which travels on the surface of Mars. • These robots, like remote-controlled toys, require energy to be operated, but the batteries used in the toys cannot be used in Mars rover Curiosity as it is too distant from a store or charger plug or sockets on Earth. What is the resource of energy that Curiosity exploration rover needs to be operated? The Curiosity exploration rover uses solar panels and batteries (which are charged by solar energy) as a resource of energy, where: The solar panels on the rover: Convert solar energy into electrical energy, which is used to charge the rover's batteries. The electrical energy from the batteries: • Powers the vehicle's sensors. • Is also converted into kinetic energy and thermal energy as the vehicle moves across Mars surface. #Science_Grade4 #mrraoufashraf #Science_Grade4 #EnergyTransformation #SolarEnergy #ElectricalEnergy #KineticEnergy #RemoteControlToys #MarsRover #STEMEducation #PrimaryScience Mr. Raouf Ashraf