1.
a) physical property b) chemical property c) chemical property d) physical property
2.
2.
a. physical property b. physical property c. physical property d. chemical property
3.
3.
a. chemical change b. chemical change c. chemical change d. physical change
4.
4.
a. chemical change b. chemical change c. physical change d. physical change
5.
4a. It is a chemical change because the apple that was left out and turned brown due to the air chemically changing the appearance of the apple.
4b.It is a chemical change because flashlight batteries contains electricity, and when the battery looses it's charge it looses energy and can not function anymore.
4c. It is a chemical change because the clothing looks the same, but the chemicals in dry cleaning remove the oil.
4d. It is a physical change because nothing was added to the salad dressing to change it's content. Just over time the salad dressing separates, but it is still the same material when you shake the bottle.
6.
a. Mix all the ingredients together in a bowl; including milk, eggs, sugar, flour, and chocolate chips. Then in small amounts put the cookie batter on the baking sheet, and then place the sheet in the oven. When the cookies are golden, remove the it from the oven, and let them cool.
b. Mixing all the ingredients together is a physical change because the material stays the same, it is just looks different. Placing the cookies on the baking sheet is a physical change because it is the same material, just a different shape. Baking the cookies is a chemical change because the cookies will permanently be made into a solid. Taking the cookies out of the oven is a chemical change because the change in temperature is hardening the cookie.
7.
5.
4a. It is a chemical change because the apple that was left out and turned brown due to the air chemically changing the appearance of the apple.
4b.It is a chemical change because flashlight batteries contains electricity, and when the battery looses it's charge it looses energy and can not function anymore.
4c. It is a chemical change because the clothing looks the same, but the chemicals in dry cleaning remove the oil.
4d. It is a physical change because nothing was added to the salad dressing to change it's content. Just over time the salad dressing separates, but it is still the same material when you shake the bottle.
6.
a. Mix all the ingredients together in a bowl; including milk, eggs, sugar, flour, and chocolate chips. Then in small amounts put the cookie batter on the baking sheet, and then place the sheet in the oven. When the cookies are golden, remove the it from the oven, and let them cool.
b. Mixing all the ingredients together is a physical change because the material stays the same, it is just looks different. Placing the cookies on the baking sheet is a physical change because it is the same material, just a different shape. Baking the cookies is a chemical change because the cookies will permanently be made into a solid. Taking the cookies out of the oven is a chemical change because the change in temperature is hardening the cookie.
7.
a. metal b. nonmetal c. nonmetal d. metal
8.
a. tungsten: metal b. antimony: metalloid c. krypton: nonmetal d. sodium: metal
9. Two metalloids are: silicon (Si) and germanium (Ge)
10.
a. Iodine is a nonmetal, so it would shatter. b. Zirconium is a metal, so it would flatten, but not shatter. c. phosphorus is a nonmetal so it would shatter. d. nickel is a metal so it would flatten, but not shatter.
11. They easily break because they are brittle and they can not conduct electricity so they would not be able to transmit electricity.
12. If they are shinny (luster), malleable, and if they are not brittle like nonmetals.
8.
a. tungsten: metal b. antimony: metalloid c. krypton: nonmetal d. sodium: metal
9. Two metalloids are: silicon (Si) and germanium (Ge)
10.
a. Iodine is a nonmetal, so it would shatter. b. Zirconium is a metal, so it would flatten, but not shatter. c. phosphorus is a nonmetal so it would shatter. d. nickel is a metal so it would flatten, but not shatter.
11. They easily break because they are brittle and they can not conduct electricity so they would not be able to transmit electricity.
12. If they are shinny (luster), malleable, and if they are not brittle like nonmetals.
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