Please answer this: What is the missing first step of the following process: - People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain.
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Answer: People dig up coal from the ground

Problem: What is the missing first step of the following process: - Cover the pot with a slightly too large cover - Place a larger pot under the first - Heat water to evaporation - Water vapor will collect on the lid - Drip into the second pot as fresh water - Salt is left behind in the original pot.

A: Place the water in a pot

Problem: Given the question: What is the missing first step of the following process: - There is a lot of pressure on the Sun - The pressure forces atoms of hydrogen to fuse together in nuclear reactions - The energy from the reactions gives off different kinds of light - The light travels to the Earth.
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The answer is:
The gravity of the sun pulls its mass inward

input question: What is the missing first step of the following process: - Magma crystalizes - Lava cools on the surface - Lava crystalizes - Minerals dissolved in water crystlize.???
output answer: Magma cools inside the crust

What is the missing first step of the following process: - The lungs remove oxygen from the air - Oxygen diffuses from alveoli in the lungs to the bloodstream - Hemoglobin in red blood cells attaches to the oxygen - Red blood cells carry oxygen all around the body - Oxygen diffuses into cells from capillaries.
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Answer: Air goes into the lungs

Q: What is the missing first step of the following process: - Melted rock inside the Earth is also called molten rock, or magma - Magma moves up through Earth's crust, but it does not always reach the surface - When magma erupts onto Earth's surface, it is known as lava - As lava flows from volcanoes it starts to cool - Minerals form when magma and lava cool -
A:
There are places inside Earth where rock will melt