Show:
Heat and Temp
Heat and Temp
Heat and Temp and Structures and Forces
Structures and Forces
Structures and Forces
100
According to the particle theory, particles move _______________ when heated up.
What is faster?
100
What colour and texture reflects radiant energy? What colour and texture absorbs radiant energy?
Reflects = shiny and white Absorbs = dull and black
100
Does it take LESS TIME or MORE TIME to boil water on top of a mountain?
The boiling point is lower at higher elevation, so that means the time it takes to cook something will be longer. The opposite in a pressure cooker, so the food cooks quicker.
100
These structures provide a huge open space and use very little materials.
What are shell structures?
100
When materials are pushed together.
What is compression.
200
As a liquid changes to a ___________ the particles become more organized.
What is solid?
200
Different densities of a fluid at different temperatures, placing a heat source at the top of the fluid and stirring the mixutre creates ________________ currents.
What is convection?
200
Suppose you have two cups of water at the same temperature. Would each glass have the same, less or more thermal energy?
Small glass = less thermal energy due to fewer particles Large glass = more thermal energy due to more particles
200
What is the process called when we melt two materials together that are the same? Different?
What is welding (same) and soldering (different).
200
When materials are twisted.
What is torsion?
300
There are 3 important ideas to the particle model. Identify two of the 3 ideas.
-All substances are made up of particles too small to be seen. -The particles are always in motion -Particles have spaces between them
300
You are sitting outside drinking a pop. You notice that water droplets form on the outside. What change of state just occured?
What is condensation?
300
Things with a definite size and shape, which serve a definite purpose or fuction are called...
Structures.
300
What is an example of a live load?
live = wind blowing, moss, person sitting at desk
300
Why is the leaning tower of pisa leaning?
the weight of the strucutre is causing the soil on one side to compress and slip.
400
Specific heat capacity states that the amount of thermal energy that warms or cools one gram of a material by 1 degree celsius. Based on specific heat capacity (think about which material warms and cools quickly) will water or sand heat up faster?
What is sand?
400
Provide one example of a heat insulator.
Wood, plastic, foam, etc.
400
The weakening of metal due to stress is known as...
metal fatigue
400
When two surfaces rub together what is created?
What is friction?
400
A plateau shows the ______________ point and ___________________ point of a substance.
What is boiling and melting?
500
Why does a bimetallic strip bend when heated?
One of the metals will expand more.
500
Why does our body maintain the temperature of 37 degrees celsius? What bodily functions happen to get rid of excessive heat?
What is perspiration and evaporation?
500
Provide two examples of fastners.
What are nails, staples, bolts, screws
500
When materials are pulled apart.
What is tension?
500
What do we call energy from the sun?
What is radiant energy?