They can use the chemical composition and the texture to determine its type
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In a disaster, you face the danger of death or physical injury. You may also lose your home, possessions, and community. Such stressors place you at risk for emotional and physical health problems. Stress reactions after a disaster look very much like the common reactions seen after any type of trauma.
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Currently the accepted model on how the earth and planets in general form. Before the earth, sun and solar system were around, only tiny particles of space dust and debris were present. Something then happened to disturb these particles, possibly the explosion of a nearby star, and as a result, the sun was born.
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Harmful substance are elements that are dangerous to human health. They are water, fruits, food and drugs that are unfit for human consumption. Examples of harmful substances are: Stale food; this is food that is spoil, food that has stayed old is not fit for the body because it is very harmful to the body
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