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WorksheetsStructures & Forces Unit Review
Total questions: 85
Worksheet time: 1hrs 25mins
A structure is...
made up of one or more parts
large or small
provides support
all answers are correct
The three structural forms are:
triangle, square, arch
shell, frame, mass
shell, triangle, dome
triangle, square, rectangle
The human skeleton is a __________ structure.
frame
shell
mass
hollow
A student who was studying for a test remembered the different models the teacher used in class to identify the different kinds of structures. When the teacher made a tent-like position with their hands, the student remembered it represented a…
mass
shell
frame
solid
Piling materials into a particular shape or design makes a mass structure. Which of the following are examples of a natural mass structure?
Dams and mountains
Brick walls and coral reefs
Ice sculptures and sand castles
Mountains and sand castles
Which of the following is an example of a frame structure?
Hockey puck
Hockey net
Hockey pads
Hockey skates
Egg cartons, food cans, bottles and pipes are examples of…
Manufactured shell structures
Natural shell structures
Manufactured frame structures
Natural frame structures
Spider webs are examples of structures that can hold up to 4000 times the weight of the spider that made it. The spider web is a…
Solid frame structure
Solid shell structure
Natural shell structure
Natural frame structure
All of the following structures can be classified as manufactured except a…
Jigsaw puzzle
Spoon
Feather
Fishing net
Each manufactured structure can be paired with a natural structure it is based on. Which one of the following pairs is correct?
webbed feet and flippers
mushrooms and webbed feet
webbed feet and umbrella
egg carton and webbed feet
Which of the following is the best definition of a “natural structure”?
A structure created by people but using only materials from nature.
A structure created by and using the technology of humankind.
A structure created by nature and then copied by people.
A structure created by plants, animals or environmental elements.
Which of the following is the best definition of a “manufactured structure”?
A structure created by people but using only materials from nature.
A structure created by and using the technology of humankind.
A structure created by nature and then copied by people.
A structure created by plants, animals or environmental element
Why is a house considered to be a combination structure?
It has a frame but also has a lot of mass.
It has a frame that is surrounded by an exterior shell.
It is a shell but also has a lot of mass.
It has mass that is created by its frame.
How a structure is put together, how it is shaped and the types of materials that are used to build it are all part of the structures…
Design
Function
Classification
Stability
Aesthetics refers to…
how something is made
how something is displayed
how something is built
how something looks
The limits in which a structure can safely perform is the…
performance requirements
centre of gravity
speed limit
margin of safety
Containing, sheltering, transporting, and lifting are all words to describe a structures…
Design
Stability
Function
Aesthetics
When choosing the most suitable materials to build a structure what should architects, designers and engineers consider before making their final choice?
cost, appearance, environmental impact, energy efficiency
cost, color, life expectancy, impact strength
environmental appearance, type of symmetry, type of joints, cost effectiveness
flexibility, impact strength, energy efficiency, color
Safety, cost and efficiency are all examples of…
internal forces
external forces
complementary forces
performance requirements
What four areas are questions developed to get an overall perspective for evaluating a design?
Cost, benefits, safety, environment
Safety, failures, break-downs, stress
Materials, need, availability, hardness
Resistance to heat, water, cold and acid
Which perspective is being evaluated when asking the question, “Who and what could be affected by the risks of the design?”
Cost
Benefits
Safety
Impact of the environment
Which perspective is being evaluated when asking the question, “Who will enjoy the design?”
Cost
Benefits
Safety
Impact of the environment
The diagram above shows a camera which is a complex system. Which of the parts when removed, will not affect its function?
Part A
Part B
Part C
Part D
What design element is related to the climate the house below is built for?
Steep roof
Garage in front
Various shapes used throughout house
Multiple rooms on upper floor
What is the function of a structure also known as?
What it’s made of
Why it was built
How beautiful it is
It’s role or job
Which of the following is not a property?
Hardness
Resistance to heat
Aesthetics
Brittleness
The properties that help bones in your body perform their functions are…
ductility and brittleness
hardness and flexibility
rigidity and hardness
plasticity and brittleness
When designing a hot tub, what are the most important properties of materials to consider?
hardness, resistance to heat and resistance to water
absorbent, hardness and resistance to water
transparent, resistance to heat and resistance to water
resistance to water, magnetic and plasticity
Structures have varied designs because of…
climate, culture, tradition
technology and economics
seasonal demands
all answers are correct
Two essential characteristics of effective structures are…
to stay warm and dry
to remain stable and be mobile
to provide support and remain stable
to provide protection and security
Johnny wants to construct a floor-to-ceiling screen in his home to separate the dining area from the living room so you cannot see directly into the other room. He does not want the screen to be easily scratched by his pet dog. At the same time, he wants to ensure that during dinner time, the living room can be lit by the lights in the dining room to conserve electricity. Which of the following properties should the screen have in order to meet Johnny’s needs?
Row A
Row B
Row C
Row D
Prabh has to select materials for making a thermal jacket and a frying pan. Based on the classification chart above, which material should he choose to make them?
Row A
Row B
Row C
Row D
Which material will be most suitable for making part X of the umbrella for use on both rainy and sunny days?
Row A
Row B
Row C
Row D
Himanshu was given five objects: raincoat, cooking pot, magnifying lens, rubber band and a floor tile. He grouped the objects into two groups. Group A has three objects and Group B has two objects. Which one of the following properties did he use to group the objects?
Magnetism
Flexibility
Heat conductivity
Electrical conductivity
Sam is visiting his grandma in the country. The temperature will be cool, about 10℃. Which shirt is the best for him to take along.
Cotton shirt
Nylon shirt
Silk shirt
Polyester shirt
What must object X be?
Table cloth
Bath towel
Pair of scissors
Pair of fabric gloves
What is friction?
Two surfaces joined together by bonding.
Two surfaces rubbing against each other.
Two surfaces creating a chemical reaction.
Two surfaces falling due to high winds.
Which of the following is a joint that uses friction?
Shoulders
Hips
Cement
Nails
Which of the following is a joint that uses bonding?
Glue
Tendons
Muscles
Tacks
Which of the following are examples of joints that rely on friction? (You can choose more than 1.)
Nails
Glue
Interlocking pieces
Screws
Your elbow is an example of a…
Fixed joint
Interlocking joint
Funny bone
Moveable joint
If you nailed two pieces of wood together, where would friction be present?
Between the wood and nails and also between the two pieces of wood.
Between the wood and nails only.
Between the two pieces of wood only.
Friction would not be present.
Fixed joints are rigid to prevent any…
movement
strength
elasticity
all answers are correct
Which of the following types of joint would work best to attach a door hinge to its frame?
Flexible
Rigid
Adhesive
Tie
Which of the following fasteners creates the most friction between itself and the material it is in?
Smooth nail
Screw
Rigid nail
Staple
Which of the following “rules” is true about how friction helps structures stay together?
When the surfaces that are put together are smooth, it is easier for them to move because there is less friction. In that way, the structure stays together.
When there is a lot of friction, more heat is created and the structure is kept together by the thermal energy.
When there is very little friction, there is less rubbing on a structure so things don’t break down over time.
When the structures that are put together are rough, it is harder for them to move because there is more friction. In that way, the structure stays together.
Which fastener would work best to attach a mailbox to a house?
Screw
Melted joint
Adhesive
Tie
Which of the following free body diagrams would correctly represent a car stopped at a stop light?
Force is measured in…
Newtons
Pounds
Grams
Pascals
What is not an example of an external force?
Gravity
Mass
Load
Tension
Which of the following free body diagrams would correctly represent a car coasting to the right and slowing down?
The amount of matter in an object is referred to as it’s…
grams
weight
force
mass
Which of the following statements best describes the forces present?
C and D
A, B and E
A, C and E
A, B, C, D and E
What is the mass of a giant anteater that weighs 325 N on Earth?
3.25 kg
32.5 kg
3250 kg
32.5 g
The weight of a structure is a…
Live load
Tension
Dead load
Internal force
A force that acts to stretch or pull apart something is known as…
Compression
Shear
Tension
Pressure
A moving or changing force acting on an object is a…
Live load
Tension
Dead load
Internal force
A bridge by itself is an example of a
dead load
live load
shear
buckling
People walking down a set of stairs is an example of
dead load
live load
shear
buckling
The act of pushing an object together is…
separating components
tension
shear
compression
An internal force is one where…
One part of a structure exerts force on another part of the same structure
One part of a structure absorbs force from outside the structure
The inside of the structure combines with the overall force of the structure
The external forces exert pressure on the internal supports of the structure
A metal box was tied with a rope and pulled across the floor as shown in the diagram. Which of the arrows represent the direction that friction and gravity act on the box?
Row A
Row B
Row C
Row D
Which of the following does not describe an unbalanced force?
Forces can act in opposite directions.
Net force will be more than zero.
Keeps an object at rest or moving at a constant speed.
Forces that cause motion.
What is the common force acting on the three situations above?
Friction
Gravity
Weight
Normal
Which way is the object moving?
Up
Down
Left
Right
It is not moving
Which way is the object moving?
Up
Down
Left
Right
It is not moving
The weakening of a structure due to the external and internal forces acting on it is defined as…
Structural fatigue
Structural failure
Structural compression
Structural stability
What is it called when a structure has too much load acting on it and it changes the shape of the structure?
Flexibility
Deformation
Tension
Compression
All of the following are environmental factors that could cause a structure to fail except…
Climate conditions
Terrain (ground) conditions
Margin of safety
Earthquake risk
Which of the diagrams represents structural stress?
Diagram 1
Diagram 2
Diagram 3
Diagram 4
Which of the following is an example of a structure that is weakened because of shearing?
A skyscraper has four long metal poles along each corner that twist in the wind and eventually break because they are not flexible enough.
The dirt under a building gets compressed or shaken by an earthquake and then a section of it slides away and causes the building to slide and fall.
The bricks in a building get weak over time and crumble causing the building to slowly decay.
All answers are correct.
Which of the following is the strongest structural shape?
Triangle
Rectangle
Arch
Square
Gluing layers of materials together to create a strong bond is called…
Corrugation
Gluing
Lamination
Bonding
What is it called when a material is formed into wave-like ridges or folds?
corrugation
lamination
reinforcing
alteration
What base would be the most stable?
wide and high
wide and low
narrow and high
narrow and low
Permafrost occurs when the ground does not completely thaw during the summer months. The top layer of the ground may become spongy as it tries to melt but the lower parts of the ground remain frozen. Structures that are built on these areas can undergo structural stress because it does not have a
solid foundation
solid building
technology to keep it held together
a flat surface
Which of the following is NOT a method of strengthening materials?
Corrugation
Weaving
Lamination
Ductility
The imaginary point in an object where the downward force of gravity acts is the…
Line of symmetry
Centre of gravity
Compression
Deformation
Which of the following modifications (changes) would help a beam bridge to be more stable?
Longer support beams
Support beams with wider bases
Fewer support beams
Thicker bridge deck
Nechal carried out an experiment to compare the temperature of air in the open and under the shade of a tree. She took two identical thermometers, placed 1 in the Sun for 10 minutes and the other in the shade for 15 minutes. Why had she not done a fair test?
They used similar thermometers.
The thermometers were placed in different places.
The duration of time for each experiment was different.
The experiment was done on the same day.
What is the manipulated variable?
Material of the canopy
Time to fall 3m
Mass attached to the canopy
Size of the canopy
What is the responding variable?
Material of the canopy
Time to fall 3m
Mass attached to the canopy
Size of the canopy
Which of the following is not a controlled variable?
Length of string used
Time to fall 3m
Mass attached to the canopy
Size of the canopy
Which of the following conclusions is the most accurate for the above experiment?
The nylon canopy is the heaviest.
The cotton is the slowest material.
The material used does not affect the time for the parachute to fall.
The materials affect the time taken by parachutes to fall to the ground.
What variable would be plotted on the x-axis?
Material of the canopy
Time to fall 3m
Mass attached to the canopy
Size of the canopy
