Properties of Materials
A property that describes how hard it is to scratch or break a material.
What is hardness?
Materials that let heat pass through easily are called these.
What are thermal conductors?
A change that can be undone is called this.
What is a reversible change?
Rocks formed when molten rock cools and hardens.
What are igneous rocks?
The process that breaks rocks into smaller pieces at Earth’s surface.
What is weathering?
This property tells whether a material lets light pass through.
What is transparency / translucency / opacity?
Materials that do not let electricity pass through easily are called these.
What are electrical insulators?
Dissolving sugar in water is usually this kind of change.
What is a reversible change?
Rocks formed from layers of sediment pressed together.
What are sedimentary rocks?
Moving rock pieces and soil from one place to another is called this.
What is erosion or transporation?
Solids, liquids, and gases are three ____ of matter.
What are states?
Metal pans are useful for cooking because metal is a good conductor of this.
What is heat?
Burning is usually this kind of change.
What is an irreversible change?
Rocks changed by heat and pressure.
What are metamorphic rocks?
Soil is made from pieces of rock mixed with water, air, and this once-living material.
What is organic matter / humus?
A liquid changes to a gas at this temperature called its ____.
What is its boiling point?
Plastic is often used around wires because it is an electrical ____.
What is an insulator?
In a solution, the substance that disappears is the ____.
What is the solute?
Fossils are most often found in this type of rock.
What is sedimentary rock?
Sandy soil lets water pass through quickly, but clay soil does this more slowly.
What is drains / lets water through?
Gases can do this more easily than solids and liquids: they can be ____.
What is compressed / squashed?
Name one material that is usually a good electrical conductor.
What is metal / copper / iron / aluminum?
In a chemical reaction, the starting substances are called these.
What are reactants?
Name one metamorphic rock from the workbook.
What is slate, marble, or gneiss?
Compost improves soil by adding this important material.
What is organic matter / nutrients? (It also improves the texture, which artificial fertiliser doesn't)