The ________ is the basic building block for all matter in the universe.
atom
Atoms are extremely small and are made up of a few even smaller particles, known as __________
sub-atomic particles: protons, neutrons and electrons
When any two or more atoms join together (of the same or different elements), a _______ is formed.
Molecule
What are the three states of matter?
Solids, liquids and gases.
Give any example of a gas.
Helium, oxygen gas, carbon dioxide, water vapour, smoke.
What is the name of the phase change between a liquid and a solid?
Freezing
What is a mixture?
A mixture is when two or more substances have been combined.
Give an example of a Homogenous mixture.
E.g. oros and water, strawberry milkshake, salt and water.
What happens when you mix sand with water and let it stand?
The sand settles to the bottom of the container and the water clears.
How can we seperate sand and water?
using a filter or fine sieve
Give an example of a Heterogeneous mixture.
E.g. cereal and milk, sand and water, oil and water.
