Physical vs Chemical Changes Notes

Which of the following is NOT an example of a physical change?

What are all the ways a physical change can occur?

What does chopping, melting, crushing, breaking glass, ripping up paper and getting paper or clothing wet mean?

Wadding up Paper

Melting Cheese

A student heats a beaker of water with a hot plate and over time, the water begins to bubble, the volume decreases and vapor is visible. This is an example of a ____________ change.

Burning Wood

Milk Souring

Bicycle Rusting

Cutting a tree limb into logs is (a)____________ and burning them in the fireplace is (b)____________.

When lithium metal is dropped into a container of water, the lithium sparks and fizzes and the water begins to bubble violently. The conclusion that can be drawn from that is:

In this example, there is no gas produced, no temperature change, no odor, and no solids formed. This must be a _________ change.

A white crystalline powder is mixed with water. No temperature change is observed but the solid disappears. This must be a __________ change.

A car swerves to avoid a collision with an oncoming vehicle and crashes into a tree. The tree falls over. The car is crunched. Liquids pour out of the car onto the street. Based ONLY on those observations, what happened here?