Answer:

1.A metal roof is a roofing system made from metal pieces or tiles characterized by its high resistance, impermeability and longevity. It is a component of the building envelope. Zinc, copper and steel alloys are commonly used.

2.Earthworms are commonly found in soil, eating a wide variety of organic matter. ... An earthworm's digestive system runs the length of its body

3.Smoke is a collection of tiny solid, liquid and gas particles.

Explanation:

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1. A metal roof is a roofing system made from metal pieces or tiles characterized by its high resistance, impermeability and longevity. It is a component of the building envelope. Zinc, copper and steel alloys are commonly used.

2. An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan, are externally segmented with corresponding internal segmentation, and usually have setae on all segments. ... Earthworms are commonly found in soil, eating a wide variety of organic matter.

3. Smoke is a collection of tiny unburnt particles very small carbon particles and tiny droplets of tar. Smoke is a collection of tiny solid, liquid and gas particles. Although smoke can contain hundreds of different chemicals and fumes, visible smoke is mostly carbon (soot), tar, oils and ash.

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