SCIENCE: Lab: How are soils different?
soil is a natural resources
question: How are soils different?
we use our 5 senses (see, hear, smell, taste and touch) to observe things
we use our senses see, touch and sometimes smell to observe soil
3 kinds of soil
sand
humus
clay
little tiny rocks, can be different color
very fine, powdery
made from dead plants, insects and animals
there are many kinds of mixtures of plants
each kind of plant will grow better in each kind of soil
soil is a renewable resource
Materials
a dish of clay
a dish of humus
a dish of soil
results
dry clay: dark brown, soft and powdery
dry humus: dark and light brown, rough and soft
dry sand: light brown, rough
More results
wet humus: hold a little water
wet clay: hold some water
wet sand: does not hold water