physical science test 2

Ch 2 test Name_________________________________ Date___________________________ Circle the letter of the correct answer Which of the following has the highest viscosity? a.Corn syrup b. pure substance c. water d. orange juice 2. A substance has a melting point of 0 degrees C and a boiling point of 100 degrees C. The substance is most likely? a. water b. hydrogen c. gold d. table salt 3. Flammability is a material’s ability to burn in the presence of a. hydrogen b. nitrogen c. oxygen d. carbon dioxide 4. A mixture that appears to contain only one substance is a(an) a. homogeneous mixture b. heterogeneous mixture c. compound d. element 5. The symbol for gold is a. Au b. Al c. Gl d. Go 6. During which of the following chemical changes does a precipitate form? a. Vinegar is added to baking powder b. Lemon juice is added to milk c. Lemon juice is added to water d. A banana ripens 7. Which of the following is malleable? a. glass b. pottery c. ice d. gold 8. Which of the following materials is useful for making molds because it has a low melting point? a. wood b. metal c. clay d. wax 9. Which of the following is a chemical change? a. ice melting b. ice being carved c. water boiling d. water breaking down into hydrogen and oxygen 10. Which of the following is a heterogenous mixture? a. water in a swimming pool b. sugar water c. a jar of mixed nuts c. stainless steel 11. Which of the following is a mixture? a. carbon dioxide b. silicon c. silicon dioxide d. sand 12. A mixture can be classified as a solution, suspension, or colloid based on the a. number of particles it contains b. size of its largest particles c. color of its particles d. size of its smallest particles 13. Which of the following is a physical change? a. sawing a piece of wood in half b. burning a piece of wood c. rust forming on an iron fence d. a copper roof changing color rom red to green 14. What method can be used to separate parts of a liquid mixture when the entre mixture can pass through a filter? a. filtration b. distillation c. straining d. screening 15. You are about to open a container o soy milk but notice that there are instructions to “shake well before serving.” The soy milk is most likely a a. solution b. pure substance c. colloid d. suspension 16. Which of the following is evidence of a chemical change? a. iron changes color when heated b. gas bubbles form in boiling water c. balls of wax form when melted wax is poured into ice water. d. gas forms when vinegar and baking soda are mixed. 17. Which of the following is NOT a pure substance? a. milk b. oxygen c. water d. carbon dioxide 18. What is the symbol for aluminum? a. Al b. Al c. Au d. A 19. What physical properties of nylon and leather and make them good materials to use for shoelaces? a. high density and low conductivity b. durability and flexibility c. hardness and durability d. low viscosity and flexibility 20. A substance that is made up of only one kind of atom is a(an) a. compound b. homogeneous mixture c. element d. solution 21. A material that is malleable and conducts electricity is most likely a. wood b. ice c. a metal d. motor oil Fill in the blank When a metal changes color because it has been heated, a(an) _____________________change occurred. When a metal changes color because it has reacted with another substance, a(an) ________________________________change occurred. The symbols or elements have either______________________________or ___________________letters. Matter that always has exactly the same composition is classified as a(an)________________________________. If a spoon gets hot quickly when it is used to stir a pot of soup, it is probably made of __________________. The substances in a (an)_______________________________mixture are evenly distributed throughout the mixture. Rust forms because iron and oxygen are highly______________________________elements. A compound can be made from two or more elements or other ____________________joined together in a fixed composition. Pure substances are either________________________or ____________________________. An element has a fixed composition because it contains only one type of __________________ Bonus Circle the letter of each property that is a chemical property Hardeness Density Flammability Reactivity