3.1
If we choose materials with good properties, a structure will last for a long time.
True or False?
True
Joints can be fixed or movable.
True or False?
True
Ligaments connect muscles to bones.
True or False?
False
Which part of a tree transports sugar?
Phloem
When a structural component changes shape because it is unable to resist the load acting on it.
True or False?
False
What kind of joints do we have in our skull?
Fixed Joints
In our body we have _____ muscles
656
Flexibility is...
How much a material can be bent under force without breaking.
Why is it easier to move an object across ice vs across a road?
The surface of the ice is smooth, therefore there is less resistance to movement and less friction.
Tendons are ____ and _____. They connect _____ to _____.
Strong, Flexible
Muscles, Bones
Friction depends on two things, they are:
2. The surface across which the object has to move.
When choosing materials for a structure we have to consider the structures _____
Function
Other than friction, what can be used to hold joints together? What are some examples of this?
Bonding
Glue, Tape, Cement, Welds
Bones in the human body form a _____
Structural frame
Our skin regulates body temperature by:
Perspiration and Shivering
What are the 14 properties of materials and other considerations that you need to know?
Brittleness, Ductility, Hardness, Plasticity, Resistance to Heat, Resistance to water, compression, tensile strength, aesthetics, consumer demand, availability, cost, effect on the environment, disposal of waste.
Nails, screws, rivets, tacks, and staples rely on what force to keep them in place?
Friction
Maple syrup is 'tapped" from Maple trees. Which part of the tree contains this syrup?
Sapwood, it moves the water and minerals in the tree, as well as the sap.