Definitions (gr. 3)
The upper layer of the Earth's surface called?
What is Soil?
A clear, colourless, odourless, and tasteless liquid.
What is water?
Trees produce this so humans can breathe.
What is oxygen?
Three particles that make up soil.
What is sand, silt and clay?
Give one reason soil is important.
What is to grow plants, helps give us fresh air, and provide a place for organisms to live?
Organic material made of decaying plants and animals.
What is humus?
When water turns from a liquid to a gas.
What is evaporation?
Precipitation falls to the Earth in the form of ______ or _________.
What is rain or snow?
This soil particle is the largest and is good for water drainage.
What is sand?
A substance used to kill pests.
What is a pesticide?
Parent material is made of this.
What is mostly large rocks?
Air surrounds the earth and is made of invisible ______.
What is gases?
List 2 things that can pollute the air or water.
What is littering, exhaust from cars, spraying chemicals, smoke from fire, pouring chemicals down the sink.
What is clay?
The 4 stages of the water cycle are evaporation, condensation, precipitation and ________.
What is collection?
Fertilizer made of natural materials, like plants.
What is compost?
Clouds are formed during this step of the water cycle.
What is condensation?
Lakes, rivers, and oceans are all ________ sources of water.
What is natural?
This soil has medium sized particles and feels smooth and powdery.
What is silt?
The movement of soil by wind or water.
What is soil erosion?
The name used to describe a layer of soil.
What is a horizon.
When water moves between lakes, rivers, oceans, air, and the land.
What is the water cycle?
Air or Water ________ is how clean and safe it is.
What is quality?
This soil is an equal mix of sand and silt with a bit of clay mixed in.
What is loamy soil?
Moving air.
What is wind?