3 DIVERSITY OF MATERIALS IN THE ENVIRONMENT SUMMATIVE TEST L MULTIPLE CHOICE. Read and analyze each item. Write your answers in CAPITAL LETTERS on the space provided before each number (10 points). 1. Which group contains only mixtures? A. air, bronze, carbon dioxide, oxygen B. air, bronze 18-karat gold, vinegar C. saltwater, refined sugar, mercury D. carbon dioxide, cooking oil, refined sugar 2. Which of the following is an observable property of the most acids? A They change the color of litmus paper from red to blue. B. They change the color of litmus paper from blue to red. C. They become slippery when reacting with water. D. They become more acidic when mixed with base. 3. Which of the following describes the solute-solvent combination of brass as a solution? A solid in liquid C. solid in solid B. D. liquid in solid solid in gas 4. Electrical wires are made of copper. What properties of copper is shown here? A. Copper can be drawn into wires and can withstand high temperatures. B. Copper resists corrosion and is a good conductor of heat and electricity C. Copper is a good conductor of heat and electricity and can be drawn into wires D. Copper withstand high temperatures and can be hammered into different shapes 5. Mr. Tomos has a bottle of rubbing alcohol, some candle flakes, a bottle of cooking oil and a bottle of mineral water on his table. If Mr. Tomos asks you to prepare a homogenous mixture using two of the materials on his table, which material will you use? A candle flakes and cooking oil B. cooking oil and mineral water C. rubbing alcohol and candle flakes D. rubbing alcohol and mineral water 6. A chemist is attempting to develop a new formula for hair shampoo The result of the chemist's first attempt is a shampoo with a pH of 9.0. What is the best description of the new formula? A. It is acidic and will turn blue litmus paper to red. B. It is basic and will turn blue litmus paper to red C. It is acidic and will turn res litmus paper to blue D. It is basic and will turn red litmus paper to blue. 7. These are the elements that have intermediate properties between metals and non-metals. A. Metals C. Metalloids B. Non-metals D. Transition metals 8. Which statement DOES NOT describe a solution? A. A solution is homogenous if it has been thoroughly stirred. B. A solution is a homogenous mixture that exists only in the solid phase. C. The size of the dissolved solute particles allows them to pass through filters D. The dissolved solute will not come out of the solution upon letting the solution stand SCIENCE​