1. Juan is trying to identify an unknown mineral. He can scratch the mineral with his fingernail. The mineral MUST be

Mohs Hardness Scale
Mineral Name Scale Number
Common Object
Diamond
10
• Corundum
9
Masonry Drill BiH
Topaz
(8,5)
Quartz
Steel Nail (6.5)
Orthoclase
Knife/Glass
Apatite
Plate (5.5)
Fluorite
Copper Penny (3.5)
Calcite
Fingernail (25)
Gypsum
Talc
8
7
Increasing Hardness
6
a gypsum.
b. fluorite.
C. apatite, .
d. quartz

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

What does the kyoto protocol aim to reduce

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?