Pressure Re-Test Monday

1. Study from the previous test which you corrected, the retest will not have the same questions, but the concepts of each question will be identical.

2. Reread pp 54 - 61 in Nature of Matter

3. Reread pp 66 - 73 in Motion, Forces and Energy

4. Learn Gas Law Relationships and draw models for each:
     
Pascal's Principle: Pressure in a fluid (liquid or gas) is exerted equally in all directions; think of a balloon filled with air or water.

Boyle’s Law: As Volume ↑ , Pressure ↓ and as Volume ↓ , pressure ↑

Think of the experiment with the syringe. As you pushed the plunger in, the marshmallow got smaller and as you pulled the plunger out, the marshmallow got larger.

Charles’ Law: As Temperature ↑ , Volume ↑ and as Temperature ↓ , Volume ↓

Think of a hot-air balloon as heated air makes it expand.

Gay-Lussac’s Law: As Temperature ↑ , Pressure ↑ and as Temperature ↓ , Volume ↓

Think of a sealed balloon being heated or cooled.  It will expand as it gets hotter and contract as it gets cooler.

Bernoulli’s Principle:  As the Speed of a fluid (gas or liquid) ↑ , Pressure ↓ and as the Speed of a fluid (gas or liquid) ↓ , Pressure ↑

Think of blowing air underneath the paper tent; this created low pressure in the tent and allowed higher atmospheric pressure over the tent to make it collapse.

Pressure and Particles:  As the number of particles (atoms or molecules) of gas or liquid ↑ , Pressure ↑ and  as the number of particles of gas or liquid ↓ . Pressure ↓

The more air particles you blow into a balloon, the greater the pressure in the balloon; and as you release air particles from the balloon, pressure is reduced.