Chemical vs Physical
This is the type of property that can be observed without changing the substance into something new.
A Physical Property
Ice melting into water is an example of this type of change.
Physical Change
This is the first step in solving the equation x+5=10
subtract 5 from both sides
A classroom has 12 boys and 18 girls. What is the ratio of boys to girls
12:18
Round 5.76 to the nearest tenth
5.8
The ability of a substance to burn in the presence of oxygen is an example of this type of property.
A Chemical Property
Burning a piece of paper results in ash and smoke. This is an example of this type of change.
Chemical Change
Solve for x: x+3=7
x = 4
A pack of 8 pens costs $4. A pack of 12 pens costs $5. Which is the better buy?
The 12 pack
Round 18.246 to the nearest hundredth
18.25
This physical property describes the temperature at which a substance changes from a liquid to a gas.
Boiling Point
Dissolving sugar in water is an example of this type of change
Physical Change
Solve for y: -2y=10
y = -5
A 24-ounce bottle of juice costs $3.60, and a 32-ounce bottle costs $4.48. Which is the better buy, and why?
the 32-ounce bottle, because it has a lower unit price.
What is the term for something that can hold it's shape?
malleable
This term describes the physical property that determines whether a substance will dissolve in water.
Solubility
A silver necklace rusting when exposed to air and moisture is an example of this type of change.
Chemical Change
Solve for x: 4x−3=13
x = 4
A 16-ounce jar of peanut butter costs $4.80, and a 20-ounce jar costs $6.20. Which is the better buy, and why?
the 20-ounce jar, because it has the lower unit price
You hear the sound of a door creaking. This is an observation or inference?
Observation
The difference between physical and chemical properties can often be identified by this key observation during a reaction.
whether a new substance is formed
Breaking a glass bottle into smaller pieces is an example of this type of change, but when the glass is melted to form a new shape, it is this type of change
Physical change, then chemical change
Solve for x: 5(x−2)=15
x = 5
A car travels 3 1/2 miles in 1 1/4 hours. What is the car's speed in miles per hour?
2.8 miles per hour
What is Mr. Krieg's Dogs name?
Bergamot