A structure is

• how something is built

• the core support of an object like a skeleton inside of a body

• an arrangement of parts or elements in something complex

• the framework of a building

True or False: an atom is an example of a structure

• True

• False

Which picture represents compression?

• 
• 
• 

Which picture represents how an object is affected by tension over time?

• 
• 
• 

Which image correctly represents how compression and tension are distributed on this triangle?

• 
• 
• 
• 

Which image correctly represents how compression and tension are distributed on this square?

• 
• 
• 
• 

SELECT TWO

Why did the Tacoma Narrows Bridge fail?

• Poor quality materials

• Winds caught the sides of the bridge

• Resonance (oscillating)

• Too many vehicles on the bridge

True or False: There are only 5 types of truss bridges.

• True

• False

The Tacoma Narrows Bridge was an example of a

• truss bridge

• suspension bridge

• cable stay bridge

• arch bridge

Which of the bridges pictured below is a beam bridge?

• 
• 
• 
• 
•