0001-00fa-formative



formulas, mixtures, pure substances, element symbols, physical & chemical properties
Formative pretest answers to true false questions for lesson on Matter, Energy, and Life. These questions are a quick overview of the topics in this lesson. The questions are intended to help you focus on material in the lesson. After you have studied the lesson you should be able to answer these and even more complicated questions. Revised June 26, 2013
1. T The symbol for sodium is Na. 2. T Kinetic energy is energy resulting from motion. 3. F All of the elements are metals like iron. 4. F Solids have definite shape because particles in a solid are motionless. 5. F Salt water is a pure substance. 6. T Neon is an element. 7. F Pure calcium is essential for bones and teeth. 8. T Melting point is a physical property. 9. T Metals are a class of elements that conduct heat well. 10. T There are two hydrogen atoms in a molecule of H₂O₂. 11. F Mixtures can only be separated by chemical reactions. 12. T Potential energy depends on position. 13. F Mixtures have definite composition. 14. F The Law of Conservation of Energy predicts we will run out. 15. F Nonmetals like sulfur, S, are lustrous. 16. F Pure elements like potassium are safe to consume. 17. F Rusting is a physical change. 18. T Gold is a metal and does not react with oxygen. 19. T A combination of sand and iron filings is a mixture. 20. T Heat, light, and electricity are all forms of the same thing, energy.

1.	T	The symbol for sodium is Na.
2.	T	Kinetic energy is energy resulting from motion.
3.	F	All of the elements are metals like iron.
4.	F	Solids have definite shape because particles in a solid are motionless.
5.	F	Salt water is a pure substance.
6.	T	Neon is an element.
7.	F	Pure calcium is essential for bones and teeth.
8.	T	Melting point is a physical property.
9.	T	Metals are a class of elements that conduct heat well.
10.	T	There are two hydrogen atoms in a molecule of H₂O₂.
11.	F	Mixtures can only be separated by chemical reactions.
12.	T	Potential energy depends on position.
13.	F	Mixtures have definite composition.
14.	F	The Law of Conservation of Energy predicts we will run out.
15.	F	Nonmetals like sulfur, S, are lustrous.
16.	F	Pure elements like potassium are safe to consume.
17.	F	Rusting is a physical change.
18.	T	Gold is a metal and does not react with oxygen.
19.	T	A combination of sand and iron filings is a mixture.
20.	T	Heat, light, and electricity are all forms of the same thing, energy.