Physical or Chemical Change
Is burning wood a physical or chemical change?
Chemical
What category of matter is trail mix?
(element, compound, heterogenous mixture, solution)
heterogenous mixture
Name one physical property of matter
Density, mass, viscosity, buoyancy, color, etc.
What is the density of an object with a mass of 4 grams and a volume of 2 milliliters?
2 g/mL
What is the formula for density?
mass / volume
Name one physical change and one chemical change.
Physical: crushing a can, cutting paper, breaking glass, etc
Chemical: burning wood, baking bread, etc
What category of matter is hydrogen?
(element, compound, heterogenous mixture, solution)
Element
Name two chemical properties
Flammability, Reactivity, Acidity, Ability to oxidize, etc.
What density would allow an object to float in water?
Anything less than 1 g/mL
Melting a metal spoon is one type of change, while the spoon rusting is another type of change. Which is each?
Melting is a physical change, rusting is a chemical change
Is dissolving sugar in water a physical or chemical change?
Physical
What is the difference between a homogenous and a heterogenous mixture?
Homogenous - evenly mixed
Heterogenous - unevenly mixed
Name TWO substances that are viscous and TWO substances that are not viscous.
Viscous - honey, syrup, mud
Not Viscous - water, oil, juice
What is the mass of an object with a volume of 50 mL and a density of 3 g/mL.
150 grams
What chemical property tells you how easily something will burn in air?
Flammability
Name TWO physical changes and TWO chemical changes that have not already been named in this game.
Chemical: Food rotting, metal rusting, etc.
Physical: Mixing lemonade, slicing bread
In order what category of matter are each of the following:
Water, Coffee, Chicken Soup
Compound, Solution, Heterogenous Mixture
Give two physical properties and one chemical property of wood.
Physical: brown, hard, buoyant
Chemical: Flammable, not reactive
How can you change the mass or volume of a substance to decrease the density?
Increase the volume or decrease the mass
Name three substances that are more dense than water.
aluminum, copper, iron, steel, potassium, etc.
Name the five signs a chemical reaction has occured
- unexpected color change
- change in heat
- gas production
- precipitate formation
- odor production
What is the difference between a compound and an element? What is the same?
Compound - two or more elements chemically bound together
Element - only one type of element
Both are pure substances
Define buoyancy.
the ability to float
Object A has a mass of 5 grams and a volume of 10 mL. Object B has a volume of 4 mL and a mass of 8 grams. Object C has a mass of 8 grams and a volume of 12 mL. Which has the highest density?
Object B
Whoever can recite the most digits of Pi gets this point
3.14159265358979322384626433