solid carbon dioxide.a cloud of gas surrounds it. it changes directly from a solid to a gas without becoming a a liquid first
a mixture that has one substance dissolved in another substance.
heating a solution
causes the solid to completely dissolve in a liquid.
cooling a solution
causes the solid particles to separate from the liquid.
when soft drinks are ______ , the gas particles escape easily.
when soft drinks are ________, there is more attraction between the gas particles and the liquid particles.
a change in the size or shape of matter. During this, the particles may be rearranged but the particles themselves do not change.
state the 2 most common types of physical changes:
1. dissolving solid and liquid 2. change of state
name 6 examples of physical changes
chopping wood, tearing paper, peeling an orange, breaking a vase, cutting a carrot, crushing a bag of chips.
a method of separating a pure liquid from a mixture.
changes in matter that go backward and forward. \they are usually, but not always, physical changes.
changes in matter that are not reversible; cannot bring matter back into its original state.
change of matter that produces a new substance, baking a cake is an example of this change. this change can be detected by a change in colour, size, shape, bubbles, a new smell or fizz.
evidence of this change includes change in mass, heat/light is given off, bubbles, fizz, smell, burning, gas given off
occurs when new materials are made that were not there before.