Matter
What is Matter?
Matter is anything that has mass (weight) and takes up space.
What is the definition of sublimation?
Sublimation is when a solid turns to a gas without passing through the liquid stage.
What can be used to measure and describe the physical property of a substance?
The 5 senses (touch, see, hear, smell, taste)
A physical change is any change that results in the formation of a new substance.
True or false?
False
A physical change is a reversible change in the physical properties of a substance.
List the 3 states of matter.
Solid, liquid, gas
Give one example of deposition.
(frost, snowflakes forming in clouds, soot on chimney)
List two examples of physical properties.
Answers may vary.
(texture, odour, appearance, colour, hardness, lustre, opacity, magnetism)
Is breaking a glass window a physical or chemical change. Explain why.
Physical change because it just changes the shape of the object.
A gas expands to fit the volume of the container it is placed in.
True or False?
True
Evaporation occurs when a gas becomes a liquid.
True or False?
False
Evaporation is when a liquid becomes a gas.
How are chemical properties different from physical properties?
They require a chemical change for the property to be observed.
List two clues that help determine whether a chemical change has occured.
Answers may vary.
(colour changes, production of an odour, temperature changes, creation of a gas and formation of a solid)
List one way that solids and liquids are similar.
Answers may vary.
(made of particles, can change state into a gas, can be changed from a gas)
What is the degrees that represents the freezing point AND the boiling point of water?
0 degrees represents the freezing point of water
100 degrees represents the boiling point of water
Toxicity is the measure of how poisonous a chemical is.
True or False?
True
Why is cooking an egg an example of a chemical change?
It is a chemical change because the liquid component of the egg changes from liquid to solid.
Using science terminology, explain the position of particles in solids, liquids and gases.
Solids have particles tightly packed together.
Liquids have particles packed together looser than solids, but more densely than gases.
Gases have particles that are spread apart.
When an object is ________, it gains thermal energy.
When an object is cooled, it ________ thermal energy.
When an object is HEATED, it gains thermal energy.
When an object is cooled, it LOSES thermal energy.
What are 3 things that are poisonous to humans?
Answers may vary.
(carbon monoxide, household cleaners, alcohol, batteries, bug spray)
List two examples of reversible (physical changes) AND two examples of irreversible (chemical changes).
Answers may vary.
Physical: melting a chocolate bar, freezing an ice cube, dissolving sugar in water
Chemical: frying an egg, baking a cake, a nail rusting, burning toast