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Check your knowledge! Take our fun quiz for the advanced Properties Section of the Fundamentals Chapter of our textbook! Follow the instructions and then click on the "Check it!" button for each question.

Advanced Activities: Properties

1.	The aerodynamic forces for flight occur in a fluid. The fluid is usually air or water, although there are other fluids. (Check the correct answer.)
	True False

2.	The temperature of the fluid is an important part of how the fluid behaves. For example, hot oil flows faster than cold oil. (Check the correct answer.)
	True False

3.	The reason why lakes freeze from the surface down, is because very cold water is lighter than cool water, so it rises to the top of the lake. (Check the correct answer.)
	True False

4.	It is very important to know the temperature of the fluid when computing aerodynamic quantities. (Check the correct answer.)
	True False

5.	When a fluid moves over or through an object, it gives small pushes on the surface of the object. These pushes, over the entire surface, are defined as _____________. (Check the correct answer.)
	temperature pressure properties

6.	Pressure is measured in force per unit ___________ (Check the correct answer.)
	length area volume

7.	Air pressure increases as the altitude decreases. (Check the correct answer.)
	True False

8.	Density is a measure of how much mass is included in a given object or volume. (Check the correct answer.)
	True False

9.	When we talk about the density of fluid, we often refer to a specific volume, such as a cubic meter, a cubic foot or a slug. (Check the correct answer.)
	True False

10.	_____________ is a measure of how much a fluid will resist flowing on a surface. (Check the correct answer.)
	Force Density Viscosity

11.	Scientists and engineers define viscosity by using units of mass. (Check the correct answer.)
	True False

12.	Forces have been defined as pushes or pulls on an object. Various mathematical formulas are used to measure force. (Check the correct answer.)
	True False

13.	An object will weigh less, at high altitude, but the mass will remain the same. (Check the correct answer.)
	True False

14.	The units for weight and gravity are: pounds mass or pounds force. Mass will not change. Pounds force will change with altitude. (Check the correct answer.)
	True False

15.	How fast an object moves is measured by its velocity. (Check the correct answer.)
	True False

16.	If a person runs 10 kilometers in 1 hour, his or her velocity is _______ kilometers per hour. (Check the correct answer.)
	1 10 11

17.	Acceleration is a measure of how the velocity of an object is changing over time. (Check the correct answer.)
	True False

18.	The units for velocity are meters per second, feet per second, miles per hour, and _____________ per hour. (Check the correct answer.)
	seconds kilometers velocity

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