D+D
What is the term used to describe the ability of a substance to spread out evenly in a space?
Diffusion
Name the three common states of matter.
Solid, Liquid, Gas
What is a substance called that dissolves into a liquid.
Solvent
How does temperature affect the rate of diffusion?
increases rate of diffusion.
What is the formula used to calculate density of an object?
Density = mas/volume
True or false? Gas paricals have a stronger attraction to each other then liquid particles.
False. They are weaker.
What chemical property is used during evaporation and distillation?
boiling point
What separation technique uses the property of solubility?
Chromatography.
Diffusion happens when ______ move from a ______ concentration to a _____ concentration.
Diffusion happens when particles move from a high concentration to a low concentration.
What is it called when Liquid becomes a gas?
Evaporation.
What is a combination of two or more substances called?
A mixture
Density = 2 Mass = 4 Volume = ?
Volume = 2
2 = 4/2
Why do some objects like wood float on water?
They are less dense.
Burning paper is an example of what kind of change?
Chemical Change.
How would you best separate sand from water.
Filtration
What separation technique could we use to separate iron from sand?
Magnetic
Object A and B have the same mass. Object A has more volume then B. Which object is more dense?
Object B is more dense
Density= mass/volume
How can you identify a chemical change? List at least 4 things you can look for.
Gas produced (fizzing), Colour Change, Heat produced
Precipitate formed, Change in Smell, Light Produced
A solute dissolve when a solvent "pulls it apart". Using particle theory, what is the explanation for this.
Forces of Attraction
What is two or more different types of atoms called?
Compound