Strong stimulant drugs that speed up the nervous system and are extremely addictive and dangerous.

Amphetamine

Explanation:

Amphetamine  is a synthetic, addictive, mood-altering drug, used illegally as a stimulant and legally as a prescription drug to treat children with ADD and adults with narcolepsy.

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all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.