Chapter 7 Reading Check and Chapter review Questions
Reading Check pg. 272
1. See definitions
3. Particles are more attracted to themselves than to the air particles. BONDS
of solid particles are stronger and won’t break apart.
4. Opposite of question #3 bonds are weak and more attracted to the
particles around them than to themselves.
5. Energy allows them to go against gravity (heat energy definitely)
Reading Check pg.274
1. Change of state – when a state of matter changes from one state to the
other ( gas – liquid)
5. They need to know because their product is based on it. If ice cream is not
hard then it will be a milkshake and you probably won’t buy it.
Reading Check pg.280
1. Viscosity- the thickness or thinness of a fluid
2. When particles slip past one another, they have a high flow rate, if not,
they are high in viscosity.
3. Thickness of products will determine if the product will work or not:
Candy, oil for engines, nail polish, paint etc if too thin,
they won’t work!!
4. Fast food – MacDonald’s, Dairy Queen, Laura Secord, Make up
Companies- Estee Lauder, Mabeline, Bakeries – Dominion, Sobey’s,
Paradise Bakery.
Reading Check pg. 281
1. Flow Rate – how quickly a substance pours
2. If flow rate is high, viscosity is low and visa versa.
3. Viscosity of liquid can be checked by seeing the liquid’s resistance to flow.
i.e. our lab on flow rate .
4. Low Viscosity – water, warm corn syrup, High viscosity – molasses,
MacDonald’s milk shake.
Reading Check pg. 290
1.
2.
3.
4.
Kinetic energy check vocab.
Increasing kinetic energy of particles – heat up, decrease – cool down
Three factors are: particle size, temperature and concentration.
Increasing the temperature increases the particles’ activity, gain energy
and collide with each other more so than what they would do at the
beginning.
5. Increase concentration changes viscosity – orange juice with the water
taken out becomes frozen concentrated orange juice.
Chapter review Questions pp. 298 – 299
7. a) The main factors that summarize viscosity of liquids and gases are:
b) The particle Theory in explaining viscosity and how liquids and gases are
affected
9. Liquids in the fridge flow more slowly because:
11. Warm gases are more viscous than cold gases because
12. Oil is different than water in it’s flow rate because:
14. viscosity is important in the following three careers because:
Mechanic, Candy Maker, Baker
15. a)The marshmellow expanded because:
b) The marshmellow shrank because: