Classwork #1 What is Matter?

Transcription

1 Classwork #1 What is Matter? Name: 1. For each item listed below, write either Yes if it is considered matter, or No if it is not matter. Explain your choice. a. School Bus b. Pencil c. Planet Earth d. The Sun e. Air 2. In class, someone stated that in order for something to be considered matter, you need to be able to see it. How would you respond to this classmate and what example could you give them?

2 Homework #1 What is Matter? Name: 1. Define matter. 2. Give one example of matter in each of its three states. a. b. c. 3. How are LEGOs or other building blocks similar to the structure, or make-up, of matter? 4. When a balloon is inflated, what is it being filled with? Is this substance considered matter?

3 Classwork #2 The Conservation of Mass Name: 1. Matter in a solid or liquid form is while matter in the gas form is. 2. Explain in your own words the Law of Conservation of Mass. 3. Use context clues to determine what the word conserved means. 4. One day, your school invites a magician to do a special show. For one of his tricks, the magician makes a rabbit disappear. Did the rabbit really disappear? Next he make a dove appear out of thin air. Using your knowledge of the Conservation of Mass explain both of these tricks.

4 Homework #2 The Conservation of Mass Name: 1. What does the Law of the Conservation of Mass state? 2. When an ice cube melts, what happens to the stuff (the matter ) that once made up the cube? 3. Use the results of your experiments to answer the following questions: a. What happens to the mass of water when it is frozen into ice? b. What happens to the mass of ice when it is melted into water?

5 Classwork #3 Observable Properties of Matter Name: 1. List as many physical properties of your house as you can. Try to be as complete as possible!

6 Homework #3 Observable Properties of Matter Name: 1. Color is one property of matter. Why is it not always a good idea to only rely on color when trying to identify an object? Give an example of two substance that are the same color but different. 2. Provide an example of a substance that meets the following criteria: a. Shiny b. Dull (not shiny) c. Hard d. Soft e. Conducts electricity f. Magnetic (could stick to the fridge) g. Not magnetic (wouldn t stick to the fridge)

7 Classwork #4 Mixing Substances Name: 1. Define solubility. 2. If salt mixes well in water, how can you tell if a lake is full of salt-water or fresh water? 3. What does it mean if a substance is insoluble in water? Give an example. 4. Give an example of the following solutions; try to use a different example than the ones given in the presentation. a. Solid Solution b. Gas Solution

8 Homework #4 Mixing Substances Name: 1. Give an example of a substance that dissolves in another? What is the term for this? 2. Define solute and solvent. If you mix sugar into iced tea, what is the solute and what is the solvent? 3. Why is water known as the Universal Solvent? 4. Using common household items try the following: a. Mix a substance (not salt or sugar!) into water that is soluble. What is your substance? b. Mix a substance into water that is insoluble. What is your substance?

9 Matter and Its Interactions Classwork & Homework Answer Key What is Matter? Classwork #1 1) All of the substances are considered matter. 2) Answers will vary, but should explain that everything in the universe is considered matter, even air or other invisible substances. Examples might include a balloon, tire or empty bottle. Homework #1 1) Matter is anything that has mass or weight and takes up space. Matter is everything in the universe including solids, liquids and gases. 2) The three state of matter are solid, liquid and gas. Answers will vary buy should include relevant examples of each state of matter. 3) When you make a LEGO object, the object is made up of many very small pieces. By themselves, these pieces do not look like much, but when you combine them, you can get much larger unique objects. 4) Balloons are filled with air, which is considered matter even though you can t see it. The Conservation of Mass Classwork #2 1) Visible, Invisible 2) The Law of the Conservation of Mass states that matter can neither be created nor destroyed. 3) If something is conserved it means that it is not lost or it doesn t change in amount. 4) The rabbit could not have possibly disappeared because the stuff that makes up the rabbit cannot just disappear. The rabbit must have just been moved someplace else. Similarly, the dove could not be created out of thin air because mass cannot be created, it had to have come from somewhere else. Homework #2 1) The Law of the Conservation of Mass states that mass can neither be created nor destroyed. Mass can be transformed though and take on a new form.

10 2) The matter that made up the ice cube is now just the stuff that makes up the water puddle where the ice cube once was. 3) In both situations, the mass is conserved. The mass did not change only the state it was in. Observable Properties of Matter Classwork #3 1) Student responses will vary but should include relevant physical properties such as color, size, shape, texture, ect. Homework #3 1) Many different objects can have the same color so you can t be 100% sure what an object is based only on color. For example, salt and sugar are both white but are used very differently. 2) Student responses will vary but should give an example that matched the given property of matter. Mixing Substances Classwork #4 1) Solubility is how much of a substance can dissolve in a given amount of water. 2) You may be able to tell if you tested the water s properties or if you used other senses (besides sight) such as taste or conductivity. 3) If a substance is insoluble in water, it will not dissolve in water. Examples might include oil and water or rocks and water. 4) Answer will vary but should give relevant examples of a solid solution and a liquid solution. Homework #4 1) Student responses will vary but should describe a substance that dissolves into another. The term for this is soluble. 2) The solute is what is being dissolved. The solvent is the substance that is doing the dissolving. In the example, the sugar is the solute and the iced tea is the solvent. (Some students may even make a connection that the tea has actually dissolved in the water too!) 3) Water is the Universal Solvent because more substances dissolve in water than in any other chemical. 4) Student responses will vary but should correctly identify a solute that is soluble and insoluble in water.