Reference no: EM133343035
Assignment:
1. Kira loves making things in the kitchen. She makes extra special hot chocolate by adding sugar, cocoa powder, and colored sprinkles to hot water. After drinking all of the liquid, she sees a clump of white sprinkles on the bottom of the cup. What does this tell you about the sprinkles?
a. The insoluble sugar collected on the sprinkles and made them turn white.
b. The sprinkles dissolved in the hot water, making them collect at the bottom of the glass.
c. The sprinkles turned white because the coloring on the sprinkles dissolved in the hot water.
d. The sprinkles turned white because they dissolved in the hot water and seemed to disappear.
2. Jessy wants to prepare a quick drink using a powdered drink mix. She adds the drink mix to a glass of water. What can she do to speed up the dissolving of the drink mix in water?
a. Add some ice to the water before adding the drink mix.
b. Add some salt to the drink mix, and then add it to the water.
c. Pack the drink mix into a cube before adding it.
d. Stir the drink mix and water mixture.
3. Which is an example of a mixture of solids?
a. Chocolate pudding
b. Lemonade and lemons
c. Peas and corn
d. Potatoes and gravy
4. Jack prepared two glasses half full of room temperature water. He added a whole Alka-Seltzer® antacid tablet to glass #1 and a crushed Alka-Seltzer® antacid tablet to glass #2. He stirred the mixtures in both glasses at the same time. After one minute, he observed that there was still some antacid at the bottom of glass #1 while all the antacid in glass #2 disappeared.
What conclusion can Jack make based on this experiment by selecting an answer?
a. Antacid tablets dissolve faster in water at room temperature than in water at higher temperatures.
b. Decreasing the surface area of antacid makes it more soluble in room temperature water.
c. Increasing the surface area of antacid increases the rate at which it dissolves in water.
d. Stirring affects the rate at which antacid dissolves in water more than its surface area.
5. When sugar is added to a glass of water, it dissolves. Please select an answer?
a.The sugar reacts with water to make a new substance.
b. The sugar seems to disappear in the water.
c.The sugar settles at the bottom of the glass of water.
d. The water and sugar form two separate layers.
6. When making lemonade, Emma adds sugar and lemon slices to water. The sugar seems to disappear and the lemon slices float to the top of the glass. Which of the following best describes what happens to the mixture?
a. Both the sugar and lemon slices are soluble in water.
b. The sugar dissolves in the water and the lemon slices do not.
c. The lemon slices dissolve in the water and the sugar does not.
d. Both the lemon slices and the sugar are insoluble in the water.
7. What is a combination of two or more substances that are all solids?
a. A mixture of solids
b. A pure substance
c. A solid group
d. A state of matter
8. What could you do to decrease the rate at which a substance dissolves in water?
a. Decrease the temperature of the water.
b. Increase the surface area of the substance.
c. Increase the temperature of the water.
d. Stir the substance and water with a spoon
9. Celine wants to make a special drink for her friend, so she adds powdered drink mix, honey, sugar, blueberries, and a slice of lime into a glass of water. Which of these ingredients are insoluble in water?
a. Drink mix and honey
b. Honey and blueberries
c. Sugar and slice of lime
d. Slice of lime and blueberries