LT 1.1-1.2 Practice Test

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LT 1.1 I can classify materials with respect to its physical phases (solid vs liquid vs gas) or with respect to its composition (element, compound, mixture)

1. Solids have a __________ shape and are not appreciably __________. (LT 1.1)

1 point

definite; compressible

definite; incompressible

indefinite; compressible

indefinite; incompressible

sharp; convertible

Clear selection

2. If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes; it is called a (an) __________. (LT 1.1)

1 point

heterogeneous mixture

element

homogeneous mixture

compound

mixture of elements

Clear selection

3. In the following list; only __________ is not an example of matter. (LT 1.1)

1 point

planets

light

dust

elemental phosphorus

table salt

Clear selection

4. What is the physical state in which matter has no specific shape but does have a specific volume? (LT 1.1)

1 point

gas

solid

liquid

salts

ice

Clear selection

5. A combination of sand; salt; and water is an example of a __________. (LT 1.1)

1 point

homogeneous mixture

heterogeneous mixture

compound

pure substance

solid

Clear selection

6. A small amount of salt dissolved in water is an example of a __________. (LT 1.1)

1 point

homogeneous mixture

heterogeneous mixture

compound

pure substance

solid

Clear selection

7. Which one of the following is a pure substance? (LT 1.1)

1 point

concrete

wood

salt water

elemental copper

milk

Clear selection

8. Which one of the following is often easily separated into its components by simple techniques such as filtering or decanting? (LT 1.1)

1 point

heterogeneous mixture

compounds

homogeneous mixture

elements

solutions

Clear selection

9. Which states of matter are significantly compressible? (LT 1.1)

1 point

gases only

liquids only

solids only

liquids and gases

solids and liquids

Clear selection

10. For which of the following can the composition vary? (LT 1.1)

1 point

pure substance

element

both homogeneous and heterogeneous mixtures

homogeneous mixture

heterogeneous mixture

Clear selection

11. If matter is uniform throughout and cannot be separated into other substances by physical means; it is __________. (LT 1.1)

1 point

a compound

either an element or a compound

a homogeneous mixture

a heterogeneous mixture

an element

Clear selection

12. An element cannot __________. (LT 1.1)

1 point

be part of a heterogeneous mixture

be part of a homogeneous mixture

be separated into other substances by chemical means

interact with other elements to form compounds

be a pure substance

Clear selection

13. Homogeneous mixtures are also known as __________. (LT 1.1)

1 point

solids

compounds

elements

substances

solutions

Clear selection

14. Gases and liquids share the property of __________. (LT 1.1)

1 point

compressibility

definite volume

incompressibility

indefinite shape

definite shape

Clear selection

15. Which of the following represents a mixture? (LT 1.1)

1 point

none of the above

more than one of the above is a mixture

Clear selection

15. In the following list; only __________ is not an example of a chemical reaction. (LT 1.2)

0 points

the condensation of water vapor

a burning candle

dissolution of a penny in nitric acid

the formation of polyethylene from ethylene

the rusting of iron

Clear selection

16. The picture below best represents a(n)... (LT 1.1)

1 point

element

compound

mixture

Clear selection

17. The picture below best represents a(n)... (LT 1.1)

0 points

element

compound

mixture

Clear selection

18. The picture below best represents a(n)... (LT 1.1)

1 point

element

compound

mixture

Clear selection

LT 1.2 I can distinguish between physical and chemical properties and changes (including extensive and intensive properties).

19. A separation process that depends on differing abilities of substances to form gases is called __________. (LT 1.2)

1 point

filtration

solvation

distillation

chromatography

All of the above are correct.

Clear selection

20. Of the following; only __________ is a chemical reaction. (LT 1.2)

1 point

melting of lead

dissolving sugar in water

tarnishing of silver

crushing of stone

dropping a penny into a glass of water

Clear selection

21. Which one of the following is not an intensive property? (LT 1.2)

1 point

density

temperature

melting point

mass

boiling point

Clear selection

22. Which one of the following is an intensive property? (LT 1.2)

1 point

mass

temperature

length

volume

amount

Clear selection

23. Of the following; only __________ is an extensive property. (LT 1.2)

1 point

density

mass

boiling point

freezing point

temperature

Clear selection

24. Which of the following are chemical processes? (LT 1.2)

1. rusting of a nail 2. freezing of water 3. decomposition of water into hydrogen and oxygen gases 4. compression of oxygen gas

1 point

1; 4

2; 3; 4

1; 3; 4

1; 2

1; 3

Clear selection

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