Materials, substances and particles
Mention 3 kinds of matter
solid, liquid and gas
This statement is true or false: All substance are made from particles.
True
What is the opposite of melting?
solidifying
________ is one of example of a chemical reaction.
Burning wood, burning paper, rusting.
the smallest pieces of matter that make up atoms or the parts of atoms are called
particles
A substance that holds its shape because it is made up of particles that are packed closely together in a fixed structure is called
Solid
What is melting?
Melting is a process that causes a substance to change from a solid to a liquid.
is a flour liquid or solid?
solid
Glass is a material. To make glass, people mix _____ with substances such as _________and_______
sand, ash soda and limestone
A substance where the particles are still close together, but not as tightly bonded or in a fixed structure, can be poured and take the shape of the container they are poured into - they change shape. What is it?
Liquid
Metals like ______ and ____ will melt if they are heated enough and, when the melted metals cool, they solidifies and form solids again.
gold, iron, silver, steel
What causes things to rust quickly?
moisture and humidity
How are sand and pure water similar?
They are both made of particles of matter.
Mention three kinds of solids that are similar with liquids.
sand, sugar, salt, flour, slime,
Do you think a solid can become a liquid? Give an example
Yes. Candle wax melting, Ice cube melting
Describe how burning wood is a chemical reaction.
When we heat the wood, it reacts with the air and it created new substances such as ash and gases.
Explain the difference between material and substance.
A material is a certain type of matter.
A substance is a pure type of solid, liquid
or gas: it is not a mixture
How are sand and pure water different?
Pure water is a substance. Sand is not a substance: it is a mixture or material.
What different properties do solids and liquids have?
Solids have a fixed shape and they are often hard;
liquids can flow/be poured and change shape.
How do you decide which material is a solid, a liquid or a gas?
Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume