Grain size – medium grained; can see interlocking calcite crystals with the naked eye.
Hardness – hard, although component mineral is soft (calcite is three on Moh's scale of hardness)
Structure: Massive.
Group: Metamorphic Rocks
A blackboard (also known as a chalkboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
They are less messy than most paints and markers, blunt (removing the risk of sharp points present when using a pencil or pen), typically non-toxic, and available in a wide variety of colors.
Answers & Comments
Answer:
a.round
b.smooth
c.colorful
d.heavy af
Explanation:
Answer:
Physical Properties of Marble
Colour: White, pink.
Derived: Limestone, dolomite.
Grain size – medium grained; can see interlocking calcite crystals with the naked eye.
Hardness – hard, although component mineral is soft (calcite is three on Moh's scale of hardness)
Structure: Massive.
Group: Metamorphic Rocks
A blackboard (also known as a chalkboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
They are less messy than most paints and markers, blunt (removing the risk of sharp points present when using a pencil or pen), typically non-toxic, and available in a wide variety of colors.
Properties of Hollow Concrete Blocks
Moisture Movement: Not more than 0.09%
Water Absorption: Not more than 10%
Drying Shrinkage: Not more than 0.06%
Compressive Strength:
Density: