Mixtures
What is a mixture?
When two substances mix physically but does not mix chemically like sand and water.
What is a solution?
When two substances mix physically and chemically like sugar and water.
What is density?
Density is how much stuff (mass) is packed into a certain amount of space (volume). One substance can be heavier than the other even though they take the same amount of space.
Give an example of a mixture other than sand and water.
Give an example of a solution other than sugar and water.
Milo, instant coffee, etc.
Which one is more dense: oil or water?
Water is more dense because oil will sit on top of it.
True or false: Cereal and milk is a mixture.
True because they are not chemically mixed, just physically.
True or false: Fizzy drinks are solutions.
True because carbon dioxide is dissolved in water.
Which one is more dense: alcohol or oil?
Oil because alcohol will sit on top of the oil.
True or false: Mixing tomato sauce and BBQ sauce is a solution.
False because sauces are thick and have different ingredients that don't completely dissolve into each other.
True or false: Mixing tomato sauce and BBQ sauce is a mixture.
True because sauces are thick and have different ingredients that don't completely dissolve into each other.
True or false: Water is more dense than dishwashing liquid.
False because water sits on top of the dishwashing liquid.
Why is mayonnaise a mixture?
Because it is a mixture of oil, egg yolk, and vinegar.
Why is hand sanitiser a solution?
Because alcohol is dissolved in liquid.
Why is mercury more dense than water?
Because mercury is liquid metal and metals are heavier.