Plants grow best in soil that is rich in this soil component.
What is humus?
100
This component of soil is sticky and wet.
What is clay?
100
This is how roots turn rocks into soil.
What is by growing in them and breaking them apart?
100
This is the science word for when soil is washed away.
What is erosion?
200
This layer of soil is solid and hard. It is found down very deep.
What is bedrock?
200
This is where soil nutrients in humus come from.
What is decaying/dead plants and animals?
200
This component of soil is made up of dead plants and animals.
What is humus?
200
This is how water turns rock into soil.
What is by running over it again and again until it breaks down.
200
Name one way to prevent erosion from happening.
What is plant bushes/trees/plants?
300
This is the layer of soil that most plants and animals live in.
What is topsoil?
300
In a science experiment, if 2 plants were grown in the same place with the same amount of water and sunlight but grew to different heights, what would probably cause them to grow to different heights?
What is different types of soil?
300
This component of soil is rough and often found near the ocean.
What is sand?
300
This is how temperature turns rock into soil.
What is by freezing and unfreezing in cracks in the rocks?
300
Name 2 things that can cause erosion.
What are wind, rain, ice, snow?
400
This layer of soil is in the middle and has a few rocks but not much humus.
What is subsoil?
400
Name a reason that soil is important to animals.
It provides homes/shelter. Plants grow in it to give food.
400
This component of soil is very fine and smooth. It is not very full of nutrients.
What is silt?
400
One of these is NOT a physical characteristic of a rock. Which is it? Color, texture, size, smell.
What is size?
400
This is why soil is important for human shelter.
What is it grows trees for lumber/wood?
500
This layer of soil has no nutrients. Nothing grows here.
What is bedrock?
500
Name 3 animals that live in the soil.
What are ants, earthworms, groundhogs, rabbits, etc.?
500
This component of soil has been broken down by wind, water, and temperature. It used to be much larger.
What is rocks?
500
This is why we study fossils.
What is to learn about plants and animals that died a long time ago?
500
Name a reason soil is important to conserve or protect.
What is for planting crops, for building shelter, for keeping us safe?