Science Quiz / IB design technology Topic 4 part 1

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Can you name the IB design technology Topic 4?

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A mixture that contains at least one metal. This can be a mixture of metals or a mixture of metals and non-metals.
A mixture composed of two or more substances (materials) with one substance acting as the matrix or glue.
electrostatic attraction between oppositely charged ions. These ions represent atoms that have lost one or more electrons (known as cations) and atoms that have gained one or more
The outer electrons of some atoms come close enough to overlap and are shared between the nuclei, forming this type of bond.
The outer electrons of the metal atom nuclei are free and can flow through the crystalline structure. The bonding is caused by attraction between the positively charged metallic at
They take around 30 years to reach maturity and wood from these trees is generally softer due to the faster growth of the tree, producing less dense cellulose fibres and lignin mat
Various trees which shed their leaves. The wood from these trees is generally harder and they take around 100 years to mature and therefore have a much denser cell structure.
Manufactured timber sheets made by gluing layers of wood together.
Manufactured timber sheets made by gluing particles of wood fibres together, engineered wood product manufactured from wood chips, sawmill shavings, and suitable binder, which is p
a material that is a mixture of wood fiber, plastic, and some type of binding agent. These ingredients are put together to form a material that is denser, stronger, and heavier tha
A complex chemical compound derived from wood and an integral part of the cell walls of plants and trees. It acts as a huge straw in conducting water in plant and tree stems
An organic compound consisting of a linear chain of several hundred to over ten thousand glucose units.It is the structural component of the primary cell wall of plants and trees
Growth rings along the horizontal cross section of the tree's trunk. They are the result of new growth and change in growth speed through the seasons of the year
The outermost layers of stems and roots of woody plants and trees. Often rich in nutrients for bugs and insects.
A one-cell-thick layer of tissue between the wood and bark of most woody plants and trees which is responsible for secondary growth. It is rich in chemicals which insects dislike
This metal group contains Iron. Most metals in this group are magnetic and corrode easily.
This metal group contains no Iron and are corrosion resistant and non-magnetic.
Regular arrangements of particles (atoms, ions or molecules) formed in making of metals. Various grain size.
A 3-Dimensional array of regularly spaced points coinciding with the atom or molecule positions in a crystal.
In polycrystalline materials slight deformation under load causes no permanent deformation, the atoms return to their original position on the removal of the deforming load
regions in which the regular lattice order has been locally disrupted
The deformation of a material undergoing non-reversible changes of shape in response to applied forces, when a load is applied that exceeds the elastic limit.
A metallic alloy that can be used at high temperatures, often in excess of 0.7 of their absolute melting temperature. Consider creep and oxidation resistance.
These plastics can be re-heated and therefore shaped in various ways. They become mouldable after reheating as they do not undergo significant chemical change.
Once 'set' these plastics cannot be reheated to soften, shape and mould. The molecules of these plastics are cross linked in three dimensions and this is why they cannot be reshape
This type of material is known as a glass reinforced plastic (GRP) and is used in car body repairs, sailing boats, corrugated sheet because of its lightness, toughness and resistan
a material that is composed primarily of silicon dioxide together with some sodium oxide and calcium oxide and small quantities of a few other chemicals.
An inorganic, non-metallic solid prepared by the action of heat and subsequent cooling.

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