Hazardous Materials

Question Answer
biohazard A living organism or its by-product that is harmful to the health of humans or other living things. For example, human blood is considered a biohazard because it can transmit infectious diseases.
clear Transparent or see-through. A clear substance can be either colored, like food coloring, or colorless, like water.
colorless Having no color.
corrosive The ability of a substance to dissolve or wear away other substances, such as metals or human tissue. Strong acids and bases are corrosive.
density The relationship between mass and volume of a substance; the mass per unit volume, specifically grams per milliliter. Density equals mass divided by volume (d = m/v)
evidence Information that is gained by direct observation or from reliable sources which can be used to inform decision making.
flame test A method of identifying a substance. A flame test is typically conducted by placing a small amount of the substance to be tested on the end of a looped metal wire and holding the looped end in the center of a flame.
flammable Easily ignited.
HAZMAT team An abbreviation for a hazardous materials team; a group of individuals who have the skills needed to investigate, identify, and transport hazardous materials.
hazardous Harmful to the health of humans or other living things because of toxicity, flammability, corrosiveness, reactivity, radioactivity, or infectiousness.
indicator A substance that changes color in the presence of another chemical or group of chemicals. For example, universal indicator is an acid-base indicator that shows by color the pH of a substance.
infer To conclude by reasoning from evidence. For example, if we see a child running toward a school building in the morning as the bell rings, we can infer that the child is late for school.
miscible The ability of substances (usually liquids) to mix together. For example, milk and water are miscible, whereas oil and water are not.
mixture A physical combination of two or more substances. Mixtures do not usually have a fixed composition: the amount of one or more of the substances in the combination can vary.
MSDS An abbreviation for Material Safety Data Sheet, which is a list of the chemical and physical properties of a specific chemical.
observe To see or otherwise detect something.
oxidizer A substance that readily accepts electrons from another substance, often resulting in combustion. Oxygen is an example of an oxidizer.
pH The expression of the acidic or basic strength of a solution. (see rest of definition on hard copy)

number representing a ten-fold increase in hydrogen ion concentration; 14 is the least acidic (or most basic), 7 is the neutral and 1 is th

phase A homogeneous state of matter; either solid, liquid, or gas.
physical property An intrinsic property of a material, such as density, melting point, or hardness
radioactive Capable of releasing energy in the form of particles or electromagnetic waves.
reactive Capable of exploding when exposed to other substances (such as air or water) or emitting toxic fumes when mixed with other substances.
simulation A model or example of a real-life situation or event.
solubility A measure of the amount of a substance that will dissolve in a specified amount of another substance at a particular temperature. Often measured in grams per liter at 25? C.
toxic Poisonous; the capability of a substance to cause harm to living systems.