soil facts
how many years does it take to form a 1-inch layer of soil?
1000 years
how many layers of soil are there?
5 layers
particles
true or false: soil is home to lots of living and non living things
true
what are the three ways humans harm soil?
erosion, salty soil and pesticides
true or false: soil is only made up of non-living materials
false
which layer is the thinnest and consists of organic material?
the humus
what are the 3 types of particles soil is made up of?
clay, sand and silt
what are 3 non-living things we can find in soil?
rocks, minerals, air, (other answers too)
how does salt get into the soil?
from slating roads and watering plants with salt water
how does soil help plants?
It helps them grow and gives them nutrients
What is organic material?
dead and decaying plants and animals
order clay, sand, and silt from largest particles to smallest particles
Sand, silt, clay
what do we call bones and remains of animals and plants from a very long time ago?
fossils
true or false: pesticides are good for bugs
false
what are two reasons soil is important to us?
many different options
which layer do plant roots grow in and many animals and organisms live?
topsoil
how would you describe the texture of sand?
rough and gritty
what is your job title if you work with fossils?
paleontologist
what are some things that are good for compost?
food scraps, specifically vegetables, fruits, and egg shells
what are two reasons soil is important to us?
many different reasons
name all 5 layers from the bottom layer to the top layer
bedrock, parent material, subsoil, topsoil, humus
which soil particle is the best for water drainage?
why are plant roots important to soil?
it hold the soil in place so wind and water doesn't blow it away
why should we compost? (2 reasons)
food waste take up a lot of space in land fills, and compost is good for plants