CH 7 Short Answers Flashcards
Fluids include all liquids and gases
Air and Water are two fluids essential to life on earth
Fluids are part of all living things
Flow can be laminar (smooth) or turbulent (rough and irregular)
Streamlined objects reduce turbulence and create more laminar flow
The particle theory can be used to explain the behaviour of fluids
Visocity is a measure of how thick or thin a fluid is and change with temperature
Flow rate can be used as a measure of the visocity of a fluid
Fluid particles are attracted to eachother (cohesion) and to the sides of their containers (adhesion)
The need to control fluid flow occurs in many aspects of life
The skills of scientific inquiry can be used to investigate factors that affect the flow of different fluids
- Inquiry skills can be used to investigate how fluids flow at different rates
- Experimentation skills can be used to determine how the type of surface affects the flow rate of a fluid moving down a slope
- Experimentation skills can be used to determine how temperature affects the visocity of different fluids
Fluid mechanics is the study of how fluids behave when in motion or at rest
Humans control fluid flow (either through objects or around them) to meet certain needs
• Aerodynamics is the study of moving gases
• Hydrodynamics is the study of moving liquids
The flow of fluids can have a positive and negative effects on society and the enviornment
• Fluid flow plays a role in many aspects of our daily lives, from health care to sports, from the food industry to transportation.
• Managing fluid flow is an important part of many careers and hobbies.
• Well-managed fluid flow can provide benefits, such as flood control, generation of electricity, and efficient motion.
• Poorly managed fluid flow creates considerable costs-both financial and environmental.
What is The Particle Theory Of Matter?
• all matter is made of tiny particles
• particles have empty spaces between them
• particles are moving randomly all the time
• particles move faster and spread farther apart when they are heated
• particles attract each other
