Materials and Life Cycle Basics
Which term best describes glass used in a window?
a) Resource b) Material c) Product end-of-life d) Monomer
b) Material
The smallest particle that still behaves like aluminum is a(n)…
a) Molecule b) Atom c) Polymer d) Compound
b) Atom
Color, density, and malleability are examples of…
a) Chemical b) Physical c) Bonds d) Outputs
b) Physical
A block has m = 200 g and V = 100 cm³. Its density is…
a) 0.5 g/cm³ b) 1 g/cm³ c) 2 g/cm³ d) 20 g/cm³
c) 2 g/cm³
Ethylene (C₂H₄) molecules join repeatedly to form polyethylene. Ethylene is a…
a) Polymer b) Cross-link c) Monomer d) Gas
c) Monomer
Sand, crude oil, and bauxite are examples of…
a) Polymers b) Inputs c) Raw materials d) Outputs
c) Raw materials
Oxygen gas (O₂) is classified as a…
a) Compound b) Element c) Cross-link d) Mixture
b) Element
Flammability is a(n)…
a) Physical b) Chemical c) Life-cycle input d) Volume unit
b) Chemical
An object with ρ = 0.8 g/cm³ placed in water will…
a) Sink b) Float c) Dissolve d) React
b) Float
Adding covalent bridges between polymer chains is called…
a) Recycling b) Cross-linking c) Sublimation d) End-of-life
b) Cross-linking
Disposing of a plastic bottle in a recycling bin refers to its…
a) Life-cycle input b) End-of-life c) Physical property d) Bias
b) End-of-life
Which sample is not a compound?
a) NaCl b) CO₂ c) H₂O d) He
d) He
Which unit measures mass?
a) mL b) cm³ c) kg d) °C
c) kg
Particles tightly packed, only vibrating, describe a…
a) Gas b) Liquid c) Solid d) Plasma
c) Solid
Cross-linked polymers generally show…
a) Lower heat resistance b) Greater elasticity / rigidity c) Higher recyclability d) Lower density than water
b) Greater elasticity / rigidity
The overall charge of an atom is determined by the balance between…
a) Protons & neutrons b) Neutrons & electrons c) Protons & electrons d) Electrons & photons
c) Protons & electrons
Which two subatomic particles are found in the nucleus of an atom?
a) Protons & electrons b) Neutrons & electrons c) Protons & neutrons d) Electrons & positrons
c) Protons & neutrons
Volume is commonly expressed in…
a) Joules b) Liters c) Newtons d) Grams
b) Liters
Which state has no fixed volume?
a) Solid b) Liquid c) Gas d) Polymer
c) Gas
The “slime” made from PVA and borate is best described as a…
a) Raw material b) Thermoplastic c) Cross-linked gel d) Credible source
c) Cross-linked gel
Oxygen gas (O₂) is classified as a…
a) Compound b) Element c) Cross-link d) Mixture
b) Element
The identity of an element is defined by the number of…
a) Neutrons b) Protons c) Outer-shell electrons d) Total nucleons
b) Protons
What type of property is solubility in water?
a) Chemical b) Physical c) Output d) End-of-life
b) Physical
Which statement about density is TRUE?
a) Depends only on volume
b) Units include kg/m³
c) Water’s benchmark is 0.1 g/cm³
d) Objects with ρ > 1 float
b) Units include kg/m³
Peer-reviewed research with transparent data is a…
a) Bias b) Credible source c) Output d) Monomer
b) Credible source