Matter Review

Question 1 Label physical or chemical Silver tarnishing Ice cream melting Breaking glass Paper burning

Answer Chemical Physical

Question 2 Name the 4 states of matter discussed in class. Which has the highest amount of kinetic energy? The Lowest?

Solid, liquid, gas, plasma Plasma (higest KE), solids (lowest KE answers Solid, liquid, gas, plasma Plasma (higest KE), solids (lowest KE

Draw a molecular level representation of the states. Question 3 Draw a molecular level representation of the states.

Question 4 What method is used for separating homogeneous mixtures by boiling point?

answers Distillation

What method separates solids from liquids? Question 5 What method separates solids from liquids?

answers Filtration

Are all mixtures solutions, why or why not? Question 6 Are all mixtures solutions, why or why not?

Solutions are a homogeneous mixtures made with a liquid solvent. Answers Solutions are a homogeneous mixtures made with a liquid solvent. Not all solutions are made with a liquid solvent.

What is Kinetic molecular theory? Question 7 What is Kinetic molecular theory?

Answer matter is made up of tiny particles called atoms that are in constant motion unless their temperature is at Absolute Zero

Question 8 When substances are heated what happens to the motion of the particles? Why?

Answer The addition of heat will speed the particles up so KE will increase. According to KMT particle motion and temperature are directly proportional.

Question 9 What is the melting point of the substance? The point labeled 5 has _____________ energy. Which number indicated the liquid state?

Answer 0 ºC Kinetic 3

Question 10 Classify the following as Element, Compound or Mixture. NaCl Sand and sugar Cu Salt water Sugar Air

Answer Compound Mixture Element

Question 11 Classify the following mixtures and Homogeneous (Ho)or Heterogeneous (He) Salt water Jello Supreme Pizza Windex window cleaner Tossed salad Lucky Charms Cereal

Answers Ho He

Question 12 How would you separate a mixture of sugar and sand?

Answer First add water to the mixture The sugar will dissolve Filter out the sand…sand will be caught in the filter paper Boil off the water and the sugar will remain.

Why are gases compressible? Question 13 Why are gases compressible?

Answer Gases are compressible due to the large amount of space between the particles. (Indefinite volume)

Question 14 What is sublimation?

answer A phase change in which a substance goes from the solid phase directly to the gas phase with the addition of heat/energy.

Question 15 What are the types of evidence we look for to indicate that a chemical change has taken place?

Answer Formation of a gas (bubble) A new substance forms/A precipitate forms Temperature change

Question 16 We classify matter base on what 3 properties?

Answer Amount of energy particles possess Particle arrangement Particle spacing