SCI 8 Fluids Unit Test Outline
DATE:
, October 6th 2011
Curriculum Outcomes Addressed:
• Describe qualitatively the difference between mass and weight (309-1)
• Explore and compare objects that describe movement in terms of balanced and unbalanced forces (210-13, 210-14, 309-2)
• Describe and explain qualitatively the relationships among pressure, volume, and temperature of fluids when compressed or heated and quantitatively the
relationships of force, area, and pressure (309-3, 309-4)
• Question, investigate, and analyze qualitatively and quantitatively in a laboratory, the relationships among mass, volume, and density of solids, liquids, and
gases using the particle model of matter (208-2, 211-3, 307-8)
• Explain and describe situations where the density of substances are affected by changes in temperature, natural, or intentional (307-9, 307-10)
• Compare the viscosity of various liquids and describe factors that can modify the viscosity (307-6, 307-7)
Be sure to study your class notes and refer to the PowerPoint presentations etc. posted on my website if needed.
This information can be found at <<http://ssrsbstaff.ednet.ns.ca/bkluge/science8.htm>>.

Provide definitions for the following key terms
o Density
o Mass
o Weight
o Volume
o Buoyancy (Negative, Positive, Neutral)
o Viscosity
o Mass

Know and understand the equation used to calculate density:

List and describe at least three differences between mass and weight (see class notes – comparison chart)

Name and describe the forces acting on an object when it is sinking and when it is floating (gravitational force vs. buoyant
force – which acts in which direction and which is stronger when something floats vs. sinks)

Explain the differences between solids, liquids, and gases, using the Particle Theory of Matter in relation to…
o Particle speed (moving fast or moving slowly?)
o Particle distribution (spread out/far apart or close together?)
o Particle bonds (bonds between particles strong or weak?)

Explain how temperature affects the following properties of fluids (i.e., what is the relationship between temperature and….)
o Density
o Particle speed
o Particle distribution
o Particle bonds
o Volume
o Viscosity

Describe viscosity and how it is affected by temperature
o Viscosity is a fluid’s resistance to flow. A high viscosity fluid (molasses) flows very slowly or hardly at all,
while a low viscosity fluid (water) flows very easily and quickly. Only fluids (liquids and gases) have the
ability to flow - solids do not.
o Be able to state a simple relationship: “As temperature increases, viscosity decreases”
o Be able to describe this relationship step by step: “When the temperature of a fluid increases (becomes
warmer), the bonds between the particles weaken; when these bonds weaken, the particles are able to
move farther apart, so they spread out/are distributed more and take up more volume; the weaker the bonds
between these particles are and the farther apart these particles are, the lower the viscosity, which means
that the more easily the fluid can flow”.

Explain the relationship between force, area, and pressure, and describe how temperature affects pressure
Density = Mass
Volume