Скачать или смотреть Science |grade 4 | unit 3_ concept 1_ lesson 1| Mars Rover | second term. | _رابعه ابتدائي_ساينس

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شرح ساينس رابعة ابتدائي - ترم ثاني. الدرس الاول الوحده الثالثه concept 1. second term الترم الثاني

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In This Lesson:
Energy in Remote-Controlled Cars
Many toys such as:
cars, trucks, planes, and boats may be operated remotely.
• However, all these toys need energy to move and perform activities like moving forward or backward remotely.

How do those toys get energy?
Batteries inside these toys are the resource of chemical energy and this energy
is converted into electrical energy, then electrical energy is converted into kinetic energy or sound energy.

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 Rover
It can explore Mars, have you thought about how it gets the energy it requires to be operated ?

Mars exploration rover
Mars is about 54 million kilometers from Earth, so the spacecraft will take about six months to go that distance.

• In the last few years, man has sent many missions to Mars, all these missions had remotely operated vehicles or robots.

•The "Mars rover Curiosity" which travels on the surface of Mars, is one of the most well-known of these robots.
Mars Curiosity rover
These robots, like remote-controlled toys, require energy to be operated, but the batteries used in the toys cannot be used in these robots as they are too distant from a store or charger plug on Earth.


So, 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 and the
electrical energy is also transformed into kinetic energy and thermal energy
as the vehicle moves across Mars surface.

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