Materials Science

Question 1

Materials

Answer 1

Substances used to make objects

Question 2

Elements

Answer 2

Substances made up of atoms that share an atomic number (have the same number of protons) but can have different mass numbers (different numbers of neutrons).

Question 3

Compounds

Answer 3

Pure substances made up of more than one type of atom

Question 4

True or False: Elements and compounds are examples of pure substances

Answer 4

True: Elements and compounds are examples of pure substances

Question 5

Native metals

Answer 5

Metals that exist naturally in their elemental form

Question 6

Minerals

Answer 6

Metals that exist naturally as compounds

Question 7

Alloy

Answer 7

Mixture of a metal with another metal or a non-metal to improve characteristics for a specific application

Question 8

Polymer

Answer 8

A material with a molecular structure that is composed of many repeating smaller units bonded together

Question 9

True or False: Polymers can only be synthetic

Answer 9

False! Synthetic polymers include plastics, nylon and rubber. But natural polymers also exist, including silk, wool and paper.

Question 10

Ceramic

Answer 10

Inorganic, non-metallic solid

Question 11

Composites

Answer 11

A combination of two or more distinct materials with significantly different physical and chemical properties

Question 12

High Tensile Strength

Answer 12

Resistance to a material breaking under tension

Question 13

Ductility.

1) What is it?
2) Chemical or physical change?

Answer 13

The ability of a material to be hammered or stretched into a thin wire without breaking

Physical Change

Question 14

Malleability

1) What is it?
2) Chemical or physical change?

Answer 14

The ability of a material to be hammered, pressed or rolled into thin sheets without breaking.

Physical Change

Question 15

Lustre

Answer 15

The way light interacts with the surface of an object