2 1.1 States of Matter

Practice questions

1. Which of the following is not an example of matter?
   1. Hate
   2. A tree
   3. A book
   4. A fried egg
2. Which of the following is a chemical property?
   1. Steel wool burns when ignited by a flame.
   2. A gallon of milk weighs over eight pounds.
   3. Gold can be stretched into very thin wires.
   4. Sulphur is yellow.
3. Which of the following statements represents a physical change? Select all possible answers.
   1. The alcohol in many thermometers freezes at about −40 degrees Fahrenheit.
   2. The elements sodium and chlorine come together to make a new substance called sodium chloride.
   3. Water boils and becomes steam.
   4. Food is converted into usable form by the digestive system.
4. Which of the following is an element?
   1. Carbon
   2. Water
   3. Coffee
   4. Air
5. Which of the following is a pure substance?
   1. Hydrogen
   2. Seawater
   3. Tea
   4. Concrete
6. Which of the following is a heterogeneous mixture?
   1. Chocolate chip cookie
   2. Carbon
   3. An emulsion
   4. Salt
7. Which of the following statements is true?
   1. All heterogeneous mixtures must contain three or more components.
   2. Pure substances cannot be broken down into simpler substances by physical methods.
   3. Sugar is an element.
   4. A mixture of water, salt and sand is an example of a homogeneous mixture.
8. Which of the following substances takes the shape of the container and has a definite volume?
   1. Stainless steel wire
   2. Salt crystals
   3. Helium gas
   4. A glass of fruit juice
9. Which statement correctly describes the volume and shape of a gas?
   1. It has an indefinite shape and a fixed volume.
   2. It has a fixed shape and an indefinite volume.
   3. It has a fixed shape and a fixed volume.
   4. It takes the shape of the container and expands to fill the container.
10. Which of the following statements describes a chemical property? Select all the correct answers.
    1. Copper objects turn green when exposed to moist air for a prolonged period.
    2. The density of Lithium metal is 0.534g/ml at 20◦C.
    3. Potassium metal reacts vigorously with water to form potassium hydroxide solution and hydrogen gas.
    4. Aluminium metal is a solid at room temperature.
11. Why is iron considered a metal?
    1. It is a solid at room temperature.
    2. It is shiny.
    3. It conducts electricity and heat well.
    4. All of the above.
12. Fill in the blanks with correct words from the following list: phases, colours, electricity, heat, ductile, shiny, brittle, heat, malleable, do not, electricity
    Begin activity: Metals are typically …………………… conduct…………………… and ……………………………… well, and are………………… and………….. . Whereas non-metals are a variety of ……………….. and …………… , are ……………… in the solid phase, and ……………………. conduct ……………… or ………………….. well.
13. Fill in the blanks with correct words from the following list: brittle, heat, metal, non-metal, sheets, wires, electricity
    Begin activity:

    Carbon behaves as a ……………… because it conducts ………………. and ………………….. well. It is a …………………. because it is black and ……….. and cannot be made into …………… or ……………….. .

Solutions

1. (a)
2. (a)
3. (a) and (c)
4. (a)
5. (a)
6. (a)
7. (b)
8. (d)
9. (d)
10. (a) and (c)
11. (d)
12. Metals are typically *shiny*, conduct *electricity* and *heat* well, and are *malleable* and *ductile*. Whereas non-metals are a variety of *colours* and *phases*, are *brittle* in the solid phase, and *do not* conduct *heat* or *electricity* well.
13. Carbon behaves as a *metal* because it conducts *heat* and *electricity* well. It is a *non-metal* because it is black and *brittle* and cannot be made into *sheets* or *wires*.