Particle Model
What are all substances made up of?
Matter
What does density measure?
How tightly packed particles are.
What is a mixture?
Two or more substances combined but not chemically joined
What tool separates solids of different sizes?
A sieve
Which planet is known as the 'Red Planet"?
Mars
Name the 3 states of matter.
Solid, liquid, gas.
If these two items were the same size, which would you expect to be more dense? A sponge or a metal block?
Metal block
Is salt water a mixture or a pure substance?
Mixture
What method separates solids from liquids using filter paper?
Filtration
What animal is featured on the Australian coat of arms along with the emu?
Kangaroo
In which state are particles packed closest together?
Solid
Why does oil float on water?
Oil is less dense than water
What is a homogenous mixture
A mixture where you cannot see the individual components
What method separates a solid that has dissolved in water?
Evaporation
Tennis
Why do gases spread to fill their container?
Their particles move freely and far apart
Why do some objects sink in water, while others float.
Objects sink if they are more dense than the liquid
Name the two types of pure substances AND the two types of mixtures
Elements and Compounds, Homogenous and Heterogenous.
What technique would you use to separate a mixture of salt and water?
Evaporation
What is the only substance that naturally exists as a solid, liquid, and gas on Earth?
Water
Describe how particle movement is different in solids and liquids.
Solid particles vibrate in place; liquid particles move and slide past each other
If two objects are the same size but one feels heavier, what does that tell you?
The heavier one is more dense.
Give 3 examples of a heterogenous mixture.
Answers vary
What techniques would you use to separate a mixture of paperclips, salt and sand.
Magnetism - Paperclips
Dissolve sand in water and filter out sand
Evaporate salt water.
What two colours make green when mixed together?
Blue and Yellow