Download Elements and Compounds TEST

Study Guide for 1st Semester EXAM – 2014-2015
1. About 99% of the Earth's atmosphere is made up of
10. Flammable means able to _______________.
________________ and _____________.
11. A chemical change has taken place if a
2. Compounds must be made up of ____________ or
more elements.
_________ ______________ has formed.
12. Substances that are ______________ dense float
3. What is the smallest part of an element that still
retains properties of that element? _________
on substances that are __________________ dense.
13. Changes in matter are classified as
4. Oxygen, represented by the symbol O, is classified as
an __________________
_____________________ or _____________________.
5. List the major elements in Earth’s crust:
_____________________________________________
14. List five indications (signs) that a chemical change is
taking place:
_____________________________________________
_____________________________________________
_____________________________________________
_____________________________________________
_____________________________________________
_____________________________________________
_____________________________________________
6. What is the most common gas in the earth’s
atmosphere? ____________________________
15. Give an example of chemical energy.
________________________________________
7. Classify the following properties as physical or
chemical:
(Hints: Can you observe the property without changing
the matter? Reactivity is always a chemical property.)
16. During energy transformations some energy is
Property
malleability
color
thermal conductivity
reactivity with oxygen
flammability
reactivity with acid
density
volume
solubility
Physical
17. A battery converts __________ ___________
into electrical energy for human use.
Chemical
18. Kevin goes bowling. Whenever he bowls the ball,
he transfers energy from his hand to the bowling
ball. The amount of energy before the transfer is
____________ the amount of energy after the
transfer.
8. Classify the following changes as physical or
chemical:
(Hints: Has new matter been formed? Reactions are
always chemical changes.)
Change
silver tarnishing
baking a cake
melting
rusting
burning
dissolving
copper reacting with air
bleaching
breaking a pencil
stretching
always transformed into …? ___________________
Physical
Chemical
9. What is streak? _____________________________
_____________________________________________
19. What sort of energy is found in the spring of a
set mousetrap? ___________________________
20. What is the name of the hardness scale used to
classify minerals?
________________________________________
21. In your own words define:
 Conduction: __________________________
__________________________________
 Convection: __________________________
__________________________________
 Radiation: ___________________________
__________________________________
22. Thermal energy is transferred as heat from a
27. What are the properties of metals?
warmer object to a cooler object until ______________
__________________________________________
____________________________________________.
__________________________________________
23. Energy can neither be ____________________
__________________________________________
nor _________________________.
28. Fill in the blanks in the following table:
24. List some renewable, nonrenewable, and
inexhaustible energy resources:
Energy Resources
Renewable
Nonrenewable
Inexhaustible
Element Name
Chemical Symbol
Hydrogen
Phosphorus
K
Fe
Sodium
29. What is the energy transformation in a fan?
25. How is mineral hardness measured?
________________________________________
________________________________________
26. Calculate the densities of the following
substances. Use the griddables below to record your
answers:
Volume
30. What are the disadvantages of fossil fuels?
________________________________________
________________________________________
________________________________________
Mass
1
26 cm3
78 g
2
47 cm3
249.1 g
3
16 cm3
51.2 g
4
________________________________________
Julius has a cube of metal that measures 2 cm
on a side. Its mass is 80.8 grams. What is its
density?