Unit 2 Review Investigating Changes in Matter and Solutions

In a sugar-water solution, sugar is the (a)   and water is the (b)   .

How do you dilute a solution?

Elizabeth was heating a beaker of water on a hot plate. What pieces of safety equipment should she be using?

While stirring a beaker of water, a student adds sugar until no more sugar will dissolve, as shown in the figure above. Which of these most likely shows how the beaker will look if it is heated?

Jillian filled four 150 mL beakers with water. She added a different material to each beaker and stirred it 10 times. From her list below, which substances will NOT dissolve in the beaker?

A group of students decided to host a lemonade stand in a local neighborhood. They were trying to create the perfect lemonade recipe. The students started with the following ingredients: lemon juice, water, sugar. After combining the lemon juice, water, and sugar, the students had created a (a)   . The students added more (b)   to make the taste less sweet. The students stirred the lemonade and noticed that they could not see the sugar because sugar is (c)   in water.

Jillian filled four 150 mL beakers with water. She added a different material to each beaker and stirred it 10 times. From her list below, which substances dissolved in the beaker?

A class was conducting an experiment to see how salt changes the boiling point of water. Group 1 boiled 100 mL of water with no salt, Group 2 boiled 100 mL of water with 5 grams of salt, Group 3 boiled 100 mL of water with 10 grams of salt, and Group 4 boiled 100 mL of water with 15 grams of salt. As each group finished the experiment, the data was recorded. Group# Boiling Point 1 100°C 2 103°C 3 104°C 4 106°C What information is missing from the data table?

Robert and Veronica are creating examples of physical and chemical changes occurring in matter. Which of the following are examples of a physical change? Choose ALL correct answers by clicking the appropriate boxes. There will be more than one answer.

Complete the statement below. Move the answers to the correct boxes. This gate is made of strong metal. After a long period of time, metal can _____.