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In Standard 8 (both CBSE and ICSE Boards), students are asked to come up with various science projects in an exhibition. This is to assess the understanding and thoroughness of the subject. In the below article we will go through a few such easy projects on science working models for class 8, and their significances.

Introduction to science working models for class 8

Science exhibition is an integral part of the students’ syllabus in their Standard 8. A good science project for their science exhibition is every student’s wish. If you are you want to design a simple science working models for your school projects and score awesome score and a round of applause, you are at the right place. Here we have the best school science working models for class 8 for your science project along with details of what you need and its detailed procedure.

Few of the projects mentioned below are tested and extremely popular in schools. The materials used in these models are also easily available in your house and few you can buy from outside at a very low cost. Science fair projects for kids, middle school students and upper school students are included in these simple and useful science working models for class 8.

Solar Energy Project                      

Owing to the shape, a concave mirror collects the solar radiation and concentrates in one small particular point. This project is all about the same. Apart from this, it also explains how the color absorbs the sunlight and as an effect sufficient amount of heat is generated to burn an object. This project needs to be conducted outdoors on a sunny day or indoor if the sunlight enters the room through the window.

Below are the prerequisites for conducting the project

  1. A wooden stand
  2. Thermometer
  3. Tube to flow liquid
  4. Concave or converging mirror
  5. Black paper

Now let us see how it is to be conducted:

Firstly the wooden stand needs to be mounted. Pieces of black paper to be rolled around the tube. The tube to be attached in the concave mirror in a way that the sunlight concentrates in one direction. This tube to be filled with tap water After 30 minutes the temperature of the tube needs to be recorded.

Observations: You can divide the temperature increase by the direct sunlight in order to calculate the efficiency of the concave mirror solar heater. As the heat is transferred through the concave mirror and concentrated on the tube, the temperature of the water increase eventually after 30 minutes

Electric Generator

This particular model is intended to help students to understand the mechanism of electricity generation. The electric generator is also known as a wooden generator. Materials required to conduct this project are readily available at home. Hence it is economic as well. It is a simple yet fun experiment which produces electricity through mechanical energy.

Below are the prerequisites for conducting the project

  1. Coil of Magnet Wire
  2. Nail
  3. Strong Magnet
  4. Lightbulb
  5. Wood Pieces
  6. Sand Paper
  7. Base for lightbulb
  8. Wood glue
  9. Insulation tape

Now let us see how it is to be implemented

Firstly we need to make a hole in the middle of wooden pieces. Then a large nail needs to be taken and threaded one of its circles. The quarter part of the nail is to be covered with a single layer of tape. While more tape to be added on the other sides of the circle.

The coil of magnet wire to be wrapped on the insulated part of the nail in between the two circles. Now, take a free end of the wire needs to be attached to a bulb or an LED.

Magnet to be brought close to the head of the nail and while holding it near it is to be moved from side to side. Then we will see the bulb or LED will start lighting up.

Observation: The magnetic field generated helps the model to operate. Depending on the number of wire turned including size of the coil, the voltage fluctuates. The strength of coil is directly proportional to the strength of the generated magnetic field. The magnetic field should be in continuous motion to induce electricity. The constant movement of magnet or coil is necessary for this. It should be moved in a systematic way so that the coil continuously stays near through the magnetic field.

The nail also helps in concentrating the magnetic field. It is wrapped with coil and boosts the efficiency of increase in voltage. Hence it acts as a magnetic flux.

Potato Battery

Potato contains many water substance chemicals that causes a chemical reaction when interacts with one or more electrodes. Batteries contain sulfuric acid as the electrolyte, while copper as zinc as electrodes. These chemical and elements can be found in fresh potato that contains a lot of juice.

Below are the prerequisites for conducting the project

  1. Two fresh potato
  2. Copper Electrode
  3. Zinc Electrode
  4. A Digital clock
  5. Alligator clips

Now let us see how it is to be done:

Firstly zinc and copper electrodes need to be inserted into the potatoes. Then alligator clips to be used to connect electrodes to the digital clock. Now, one can see the current passing through the wires and by activating the digital clock.

 

Observation: You can use a digital multimeter to measure the voltage of the current flow from the potatoes. On an average, a digital multimeter shows 1.2 volts of electricity between the electrodes. During these experiments the result varies, it is recommended to measure for at least five times and get the average result. Now, you have created the electricity by using a potato battery. However, the main challenge is to produce electricity in a larger amount of for a longer time.

Learn more about the Top 3 Science working Models for Class 8 here.

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