topic 1
what does WHMIS stand for
name one element
Gold, Silver, Carbon, Oxygen, Nitrogen, Iron
explain what density is
The mass per unit volume of a substance
what does the flame symbol mean?
it means that something is flammable so keep away from heat.
name two characteristics of a compound. two examples.
Made of two or more elements, have very strong chemical bonds, individual parts lose their individual characteristics when they combine, Salt (NaCl, CO2 (Carbon Dioxide) H20 (water)
explain what flow rate is
How fast a fluid flows from one point to another
what does the skull symbol mean?
it means that the thing you have is poisonous
Give two characteristics of Homogeneous solutions and give one example.
sugar, water, tea, orange juice with out the pulp
explain what viscosity is
viscosity is the thickness or thinness of a fluid
what does the exclamation mark symbol mean?
it means irritant and could cause rash
Give one example of things being dissolved and be able to tell me what the solute is and what the solvent is.
salt being dissolved in water. salt is the solute and water is the solvent
what is buoyancy
The tendency of objects to sink or float in a fluid
what does the bomb symbol mean?
it means explosive
What are three factors that affect the rate of dissolving and explain how each affects the rate of dissolving in detail?
Heat – when you heat the particles they speed up and bump into each other more, so they can start pulling each other apart faster. Stirring (agitation) – when you stir a substance, the particles speed up and bump into each other more, so they can start pulling each other apart faster. More surface area – greater surface area means more particles are exposed to each other, so therefore they can bump into each other more and pull each other apart faster
Describe three things that rely on buoyancy to work
Boats, pollen, airplanes, hot air balloons