Rocks that form in layers by being pressed together.
What is Sedimentary Rock
100
The top layer of soil that contains the most humus and is the darkest colored.
What is topsoil.
100
Soil with large rock particles that feels rough and gritty and water will pass quickly through it making it difficult for plant roots to soak up needed water.
What is Sand.
100
All soils contain these 3 important ingredients.
What is air, water, and humus.
200
Melted rocks that cool and harden.
What is Igneous rock.
200
The very bottom layer of soil where rock breaks down to provide resources for making new soil.
What is the bedrock layer.
200
This soil has particles that are the smallest and it feels smooth and sticky when wet and it holds too much water in it and plants may drown.
What is Clay.
200
Explain 2 different ways or properties to identify a mineral.
What can be color, luster (silky, glassy, dull, greasy), cleavage (how they break apart), or hardness (scratch test).
300
Rocks that have been changed by heat and pressure.
What is Metamorphic rock.
300
This is the middle layer and is often lighter in color than the top with less humus and has pieces of broken rock.
What is the subsoil layer.
300
This is the best type of soil for plants to grow in because the particles are medium-sized and are more closely packed together and when it is wet it feels slippery and smooth and holds just the right amount of water in it for plants.
What is Silt.
300
Humus is made of what and why is it important.
What is the remains of dead animals and plants that leave their nutrients in the soil for plants to grow well.
400
The best soil to grow plants in to grow well and healthy and explain why this soil is the best.
What is silt, because it holds water better than sand or clay. Clay soil drowns the plant's roots and in sand soil the plant roots do not get enough water.