Question | Answer |
What is humus? | Pieces of dead organic matter |
What process breaks down rocks? | Weathering |
What is soil made of? | Weathered rocks, decayed plants, and animal matter |
What type of soil has large grains? | Sand |
What type of soil has grains smaller than sand? | Silt |
What type of soil has grains smaller than silt and sand? | Clay |
What type of soil has the smallest grain? | Clay |
What type of soil would you use to grow a garden? | Soil with lots of humus |
What type of soil would be best for a playground? | Sandy soil |
What are rocks made from? | Minerals |
What is a mineral? | A solid nonliving substance found in nature |
What is an igneous rock? | Forms when lava cools and hardens |
What is a sedimentary rock? | Forms when rock is weathered into small bits and then packed into LAYERS |
What is a metamorphic rock? | Forms when rock is exposed to heat and pressure and CHANGES, but does not melt |
What are the properties of a mineral? | Luster, hardness, and color |
What are the properties of soil? | Texture, content, and grain size |
Which kind of soil is best for growing plants because it has essential nutrients from decaying plant and animal material? | humus |
What kind of soil has a lot of space in between particles and feels gritty? | sand |
What type of soil is sticky when wet and crumbly when dry? | clay |