Matter, Mixing, and Dissolving
What is matter?
Anything that takes up space and has mass
What is the formula to calculate density?
What is mass/volume (mass divided by volume)
What word describes the thickness or thinness of a fluid?
Viscosity
What is the scientific term for an object that floats?
Positive buoyancy
True or false: carefully following an experiment's procedure is a safety rule
True
What kind of mixture looks like a pure substance?
Homogenous mixture or solution
Rank the densities of solids, liquids, and gases for most substances from lowest to highest.
gas, liquid, solid
How does the viscosity of a liquid change as temperature increases?
As temperature increases the viscosity decreases.
A liquid has a density of 1.89 g/mL. Will it float or sink in water?
Sink (density is greater than 1 g/mL)
Draw the shape that indicates an extreme HHPS hazard.
Octagon
Dilute
What are the units for density of a liquid?
g/mL
What are the two main properties of fluids?
Fluids can flow, fluids have no fixed shape.
What is the scientific term for an object that neither floats nor sinks?
Neutral buoyancy
Draw the WHMIS symbol that indicates a substance is extremely toxic or potentially fatal.
Skull and crossbones
What is the name for a solution that cannot dissolve any more solute?
Saturated
Calculate the density of an object with a mass of 122.5g and a volume of 35cm3
3.5 g/cm3
Which point from the particle model of matter is responsible for the different viscosities of fluids?
All particles are attracted to one another
What forms of matter cannot be compressed?
Solids and liquids
Where should water bottles be stored during an experiment?
In your locker
List the 4 points of the particle model of matter
1. all matter is made up of particles 2. particles have space between them 3. particles always move 4. particles in a substance attract each other. Strength of attractive forces depends on particle type.
A silver necklace with a density of 10.49g/cm3 has a mass of 62g. How much space does the necklace take up? Round to 2 digits after the decimal.
V = 5.91 cm3
A scientist is doing an experiment to compare the viscosities of several fluids. He pours each fluid down a ramp and times how long each takes to reach the bottom. What are the manipulated and responding variables?
Manipulated: type of fluid
Responding: time (or flow rate)
What part of the particle model of matter is responsible pressure in fluids.
Particles are always moving.
Describe a corrosive hazard. For double points, draw the WHMIS symbol that would be found on these products.
Can damage skin, eyes, and corrode metals.