Focus On Physical Science: California Grade 8

Lesson 2: Forming Solids

Standards Check

1.
Because metals form _______ they are good conductors. 3.c
A)ionic bonds
B)metallic bonds
C)covalent bonds
D)polar
2.
DNA consists of repeating units linked in a chain, so it is a ________. 3.c
A)crystal
B)monomer
C)polymer
D)covalent bond
3.
______ are solids in which atoms are arranged in a regular pattern called a unit cell. 3.c
A)Metals
B)Polymers
C)Monomers
D)Crystals
4.
Crystalline solids have __________. 3.c
A)two-dimensional crystalline patterns
B)no phase changes
C)an amorphous shape
D)repeating three dimensional patterns
5.
What is a property of many metals? 7.c
A)shiny appearance
B)liquid at room temperature
C)dull appearance
D)soft
6.
Malleability is __________. 7.c
A)the ability to be drawn out into a wire
B)the ability to be hammered, pressed, or rolled into thin sheets
C)the shininess of an object
D)the hardness of an object
7.
What substance does not have the property of ductility? 7.c
A)silver
B)copper
C)water
D)platinum
8.
Which of the following is a characteristic of most metals? 7.c
A)gases at room temperature
B)dull in appearance
C)poor conductors of electricity
D)shiny luster
9.
Which of the following elements would make the best electrical wire? 7.c
A)selenium
B)carbon
C)fluorine
D)copper
Grade 8
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