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Test Physical & Chemical Properties Physical & Chemical Changes 1- What is the measurement of this liquid? a. 10 milliliters b. 12 grams c. 11.5 milliliters d. 11.5 grams 2- Which of the following is true of chemical properties? a. They describe the phase the substance is in. b. They describe characteristics of a substance such as size, color, and shape. c. They explain how the substance reacts with other things d. They describe what chemical changes the substance is currently going through. While investigating a new substance, Megan and Tyler recorded the following observations: The new substance is solid. The new substance forms into thin flat sheets. The new substance is smooth. The new substance will burn. The new substance looks like it will tear easily. The new substance looks like it will dissolve in acid easily. 3- Which of their statements would be an inference about a chemical property? a. The new substance forms into thin flat sheets. b. The new substance is smooth. c. The new substance looks like it will tear easily. d. The new substance looks like it will dissolve in acid easily. 4- A worker at Fairy Godmother’s Factory places 10 mL of water in a test tube and heats the liquid over a flame for 2 minutes. The liquid boils and escapes as steam. This experiment is a good example of a. chemical change involving phase changes b. physical change involving phase changes c. chemical change involving chemical reactions d. physical change involving chemical reactions 5- Both hydrogen and oxygen are flammable. Water is made up of 2 parts Hydrogen and 1 part Oxygen. Why doesn’t water burn? a. Water will burn if you get it hot enough. b. Because water is a liquid and hydrogen and oxygen are gases. c. When elements combine physically they form new substances with different properties. d. When elements combine chemically they form new substances with different properties. Label the following as a physical property, chemical property, physical change, or chemical change: 6- freezing point ___________________ conducts electricity ___________________________ 7- tarnish forming on silver __________________ reacts with chlorine ___________________________ 8- firewood burning ________________________ alka seltzer fizzing in water ______________________ 9- melting point ___________________________ bursts into flames in presence of air _______________ 10- does not conduct heat ___________________ cutting paper into tiny pieces _____________________ 11- forms crystals __________________________ ice melting ___________________________________ 12- will burn skin __________________________ a firecracker exploding __________________________ Mike and Kylie experimented with several items to see what would happen under different conditions. Below is the data table they wrote at the conclusion of the experiment. Steel wool Paper Copper wire Put in water over night Rusted Got soppy Got wet Wood splinter Swelled up with water Held in candle flame for 30 seconds Burned Burned Got hot, bent in the middle Burned Connected to the terminals of a battery Burned No change Got hot, melted in half No change 13- Which substance changed chemically under all three conditions? a. steel wool b. paper c. copper wire d. wood splinter 14- Which substance changed physically under all three conditions? a. steel wool b. paper c. copper wire d. wood splinter 15- What would be a good conclusion for this experiment? a. Steel wool is the most reactive. b. Paper is the most reactive. b. Copper wire is the most reactive. d. Wood splinter is the most reactive. The following data was collected by a group of students as they tested four different types of plastics. Plastic Acetone Flame test Heat Crease color 1 No effect Green color Softens None 2 Softened No change No change White 3 No effect Red color Softens None 4 No effect Green color Softens None 16- Which of the plastics might be the same? a. 1 & 2 b. 2 & 3 c. 3 & 4 17- Which plastic would be best to put in a microwave? a. 1 b. 2 c. 3 d. 1 & 4 d. 4 18- Which plastic would be unsafe to use to store products that contain acetone? a. 1 b. 2 c. 3 d. 4 53 19- What does the number at the top of this box from the periodic table indicate? _____________________________________________________________________ I 20- How many neutrons would be contained in each atom of this element? ____________ 126.90 Bonus 4 points: Make two drawings that show one chemical change and one physical change. Label them.