TCI - UNIT 1 LESSON 3 - SUBSTANCES AND THEIR PROPERTIES

1. About how many atoms need to combine until you can see a substance?

• A. hundreds of thousands

• B. hundreds of millions

• C. tens of billions

• D. trillions of trillions

2. What is a substance?

• A. any collection of molecules or atoms, no matter the size

• B. matter that includes molecules that have at least four different elements

• C. matter that has a constant chemical composition and characteristics

• D. matter that has a changing chemical composition and various characteristics

3. What is another term for “substances” that is commonly used?

• A. agents

• B. chemicals

• C. molecules

• D. picos

4. Which of these is considered to be macroscopic?

• A. one drop of water

• B. two atoms of carbon

• C. three molecules of water

• D. ten atoms of oxygen

5. Mass is the

• A. shape of a substance or molecule.

• B. number of atoms or molecules in an object.

• C. physical size of an object or sample of an object.

• D. amount of matter in an object or sample of an object.

6. What unit of measurement do scientists use to measure mass?

• A. centimeters

• B. kilograms

• C. picometers

• D. pounds

7. Which of these is NOT considered to be a property of a substance?

• A. atom

• B. mass

• C. odor

• D. shape

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

8. Which of these is a property that does NOT change for all objects of one substance?

• A. mass

• B. odor

• C. shape

• D. volume

9. What is one way to tell metals of the same size and color apart?

• A. Weigh them for their density.

• B. Measure their surface area.

• C. Weigh them for their mass.

• D. Use a vinegar solution to test their shine.

10. Density =

• A. mass / volume

• B. volume / mass

• C. mass x volume

• D. mass + volume