*Unit 2: Modeling Matter Chapter 1 QUIZ

1. Sarah uses her five senses to gather information about the properties of ketchup. By doing this, she can notice many things about a food item. What is she doing?

• a. visualizing
• b. observing
• c. explaining
• d. inferring

2. Sarah notices that ketchup is the color red, smells and tastes like tomatoes, and has a thick, slimy texture. She is observing the ___________ of ketchup.

• a. smell
• b. sound
• c. properties
• d. weight

3. You work at Good Food Production, Inc. Your job description includes creating new foods and understanding the science behind why things happen the way they do when creating mixtures. What is your job title?

• a. food scientist
• b. astronomer
• c. president of Good Food Production, Inc.
• d. food taster

4. In the book, Made of Matter, it says, "If everything is made of matter, what is matter made of? All matter is made of tiny pieces." These tiny pieces are called what?

• a. sugar
• b. liquids
• c. atoms
• d. mixtures

5. According to the book, Made of Matter, "Atoms can join together to form ____________. They are bigger than atoms, but they are still tiny."

• a. substances
• b. mixtures
• c. properties
• d. molecules

6. Lauren Harold, President of Good Food Production, Inc. sent us an email asking us to test the food coloring that is used in many of our products to see if it might contain a possibly harmful dye. We were asked to figure out if the food coloring is a pure substance, or whether it is a mixture. If it is a mixture, we need to determine whether this potentially harmful dye is part of the mixture. What is the dye we will be looking for?

• a. Red Dye #54
• b. Blue Dye #82
• C. Red Dye #75
• d. Yellow Dye #27

7. All molecules of one substance are

• a. similar
• b. alike
• c. completely different
• d. exactly the same

8. All molecules are ____________ from molecules of any other substance.

• a. different
• b. alike
• c. exactly the same
• d. dangerous

11. Read the excerpt from the text, Break it Down, and answer the following question. In ocean water, are water molecules attracted to the atoms that make up salt?

• a. yes
• b. no
• c. sometimes

15. The property of being a solid or a liquid part of blood is due to the properties of the different molecules that make up that part. What key concept is this describing?

• a. Models can be changed and improved
• b. Different molecules have different properties (size, weight, shape, attraction to one another).
• c. The properties of a substance are determined by the properties of its molecules
• d. Mixtures can be separated by using the properties of different substance in the mixtures