Rocks
What are rocks most rocks made of?
One or more minals
What is an example of a mineral
iron, copper, silicon, halite ...
What is a property?
A defining characteristic
Which mineral is in pencils?
graphite
Name 2 crystal shapes.
cubic
hexagonal
tetragonal
orthorhombic
monoclinic
triclinic
How are igneous rocks formed?
Cooling magma or lava
What does natural mean?
Not made by people
Name 3 properties of minerals.
colour
streak
hardness
luster
transparency
What is an important mineral for making glass?
What is an example of a mineral with a cubic crystal shape?
halite (rock salt)
How are sedimentary rocks formed?
Rock formed by layers of particles (sediment) compressed and cemented together.
What does inorganic mean?
Not from living things
What is metallic luster?
Something that reflects light like metal.
Which mineral is used for plaster in walls?
gypsum
What is an example of a mineral with a hexagonal crystal shape?
Quartz
metamorphic rock
Rock that has been changed by heat and pressure
What is a crystalline structure?
Particle arranged in a repeating pattern
What is mineral streak?
The colour of a minerals powder.
Usually when rubbed on a tile.
Name two minerals we need in our bodies?
iron
potassium
What does a tetragonal crystal look like?
A cube stretched taller in one direction
What is an example of a rock that was made from plants that lived millions of years ago?
coal
What is a fixed chemical formula?
The same type of particles all the time
What is mineral cleavage?
When a mineral breaks smoothly along flat surfaces.
Which mineral is used to make computer chips?
Silicon
What can you do if you know the six basic crystal shapes and other properties of minerals?
Identify a sample of a mineral