Grade 7 Structures and Forces Topics 6-7 Review

The strongest structural shape is _________.

• rectangular
• arched
• square
• triangular

Your friend steals your paper and pretends to rip it but does not apply enough force to successfully do so. The paper as exhibited ___________.

• tensile strength

• compressive strength

• shear strength

• torsion strength

The amount of matter in an object is referred to as its _____________.

• grams
• weight
• force
• mass

You see a crane carrying a load of supplies at a construction site. The rope holding the supplies to the crane is experiencing _____________. 

• shear
• tension
• buckle
• torsion

Under which soil conditions would the use of pilings not be needed?  

• sand
• gravel
• bedrock
• waterlogged soil

Why are you more likely to fall over if you stand with only one foot on the ground rather than with two feet on the ground?

• a. With only one foot on the ground, your centre of gravity is perfectly over your base

• b. With only one foot on the ground, your leg lacks tensile strength

• c. With two feet on the ground, your mass is distributed over more area

• d. With two feet on the ground, your center of gravity is closer to the ground

The term deformation refers to _____________.

• a. the ability of a material to bend under force without breaking 
• b. the change of shape in a structure because the material is unable to resist the load acting on it 
• c. the drag or resistance felt when a load is placed on a moveable structure 
• d. the change of shape in a structure when the material absorbs the force acting upon it 

The force that results when the surface of one object moves against the surface of another is referred to as _____________.

• resistance 
• gravity
• stress
• friction

What is torsion?

• a twisting or turning force
• a force that makes a straight material become curved
• a pushing force that squeezes
• a pulling force that stretches a material

What is compression?

• a twisting or turning force
• a force that makes a straight material become curved
• a pulling force that stretches a material
• a pushing force that squeezes a material