Rocks
What are the three main types of rocks?
Igneous, Sedimentary and Metamorphic
What is the hardest mineral?
Diamonds
What is soil made of?
Water, air, minerals and organic matter
What is another name for the O horizon?
How many elements are there on the periodic table?
118
Which type of rock is formed through the cooling of lava?
Igneous
What are minerals made of?
What is humus?
Decomposed leaves and other organisms
What is another name for the A horizon?
Topsoil
What is the number at the top of the box called?
Atomic Number
Which rock is formed through heat and pressure?
Metamorphic
What is the Mohs Hardness Scale?
A system to be able to tell how hard a mineral is
How many layers of soil are there?
Five
What is another name for the B horizon?
Subsoil
What are the numbers in the middle of the box called?
Symbol
Which rock is formed through sediments compacting together?
Sedimentary
How many known minerals are there?
3800
What are the layers of soil?
O horizon, A horizon, B horizon, C horizon and R horizon (or bedrock)
What are the three types of soil?
Sand, silt and clay
What is weathering and erosion?
How are minerals identified
Color, luster, hardness, streak, and breakage
What are the factors that affect soil formation?
Topography, time, climate, relief and parent material
Where do roots stop growing in soil?
C horizon