In order to recreate the process of energy production that takes place in the sun, scientists use hydrogen gas and add heat and pressure. helium gas and remove heat and pressure. hydrogen gas, add heat, and remove pressure. helium gas, remove heat, and add pressure.

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hydrogen gas and add heat and pressure.

Hydrogen Gas, heat and pressure.

Explanation: Sun is made up of hydrogen and helium gas, heat and high pressure. Sun is huge ball made up of 70 per cent of hydrogen and 28 per cent. The pressure in the sun is also high.

The sun shines because it turns hydrogen into helium by the process of nuclear fusion. This states that with time the amount of helium will be more and hydrogen will be less.

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