Pre and post test Year 8 Chemistry Quiz 2013
1.
Which list below gives the states of matter in order, from ‘generally contain the closest packed particles’ to ‘generally
contain the most spread out particles’? (1 point)
Gas, liquid, solid
Liquid, solid, gas
Solid, gas, liquid
Solid, liquid, gas
2.
What does the particle model predict about particle movement when a solid is heated? (1 point)
The particles vibrate faster in the same position.
The particles move closer and vibrate faster.
The particles move farther apart and vibrate faster.
The particles move farther apart and vibrate more slowly.
3.
The word ‘atom’ comes from the Greek word.
(1 point)
‘atoma’, meaning that which cannot be seen.
‘atomis’, meaning imaginary particle.
‘atomos’, meaning that which cannot be divided.
‘atome’, meaning small sphere.
4.
An element is a substance that (1 point)
is made of atoms.
cannot be broken down into other substances.
contains water.
is a metal used in kettles.
5.
Pick the odd one out. (1 point)
Sulfur
Oxygen
Copper
Carbon
6.
The lightest element is
(1 point)
lead
hydrogen.
lithium.
carbon.
7.
Identify the list that only contains non-metals.
(1 point)
oxygen; carbon; lithium
helium; hydrogen; fluorine
mercury; copper; zinc
helium; hydrogen; silicon
8.
The component of an atom that is positively charged is
(1 point)
a proton.
an electron.
a neutron.
an element.
9.
A compound
(1 point)
is made of different elements that are not strongly joined together.
is made of different elements whose atoms are bonded strongly together.
has similar characteristics to the elements it is made from.
is a type of mixture containing only a few different types of atoms.
10. Which of the following is an example of a metalloid?
(1 point)
Germanium
Iron
Steel
Carbon
11. Which of the following diagrams best represents a compound? (Different circles represent different atoms.) (1 point)
A
B
C
D
12. Which of the following is a chemical change? (1 point)
An ice-cream melting
Making a cup of tea
Hard boiling an egg
Boiling water to make steam
13. Classify Pure water as either element (E), compound (C) or mixture (M).
(1 point)
Element
Compound
Mixture
14. Classify Iron as either element (E), compound (C) or mixture (M). (1 point)
Element
Compound
Mixture
15. Classify Air as either element (E), compound (C) or mixture (M). (1 point)
Element
Compound
Mixture
16. Classify salt as either element (E), compound (C) or mixture (M). (1 point)
Element
Compound
Mixture
17. Give a written definition of
(a) an element.
(b) a compound.
(c) a mixture.
(3 points)
18. Name two elements that are examples of
(a) metals
(b) non-metals
(c) metalloids
(6 points)
19. Give the symbols for the following elements.
(10 points)
_____
hydrogen
_____
nitrogen
_____
sodium
_____
gold
_____
iodine
_____
fluorine
_____
copper
_____
boron
a. Au
b. N
c. F
d. H
e. Na
f. Cu
g. Fe
h. I
i. B
j. Li
_____
lithium
_____
iron
20. Describe
(a) an example of a chemical change.
(b) an example of a physical change.
(2 points)
21. List 5 observations that provide evidence for a chemical change. (5 points)
22. Explain the difference between a chemical and a physical change. (4 points)
23. Complete the following response questions using the appropriate word.
????? are pure substances that contain only one type of atom (1 point)
_______________
24. Complete the following response questions using the appropriate word.
In a ???????????? mixture the mixture is uniform throughout.
_______________
(1 point)
25. Which of the following is NOT an example of a physical change.? (1 point)
condensation
filtration
decomposition
evaporation
26. Elements can be divided into two main groups (1 point)
compounds and mixtures
metals and non-metals
pure and impure substances
metals and compounds
Version A
Answer Sheet
Year 8 Chemistry Quiz 2013
1. Solid, liquid, gas
2. The particles move farther apart and vibrate faster.
3. ‘atomos’, meaning that which cannot be divided.
4. cannot be broken down into other substances.
5. Copper
6. hydrogen.
7. helium; hydrogen; fluorine
8. a proton.
9. is made of different elements whose atoms are bonded strongly together.
10. Germanium
11. C
12. Hard boiling an egg
13. Compound
14. Element
15. Mixture
16. Compound
17. Answers may vary
Sample Answer: (a) an element is a simple pure substance composed on one type of atom
only. (b) a compound is a pure substance composed of two or more elements chemically
combined in a fixed ratio. The compound made has unique new properties to the elements
making them up. (c) A mixture is a combination of substances that can be elements and
compounds not in a fixed ratio and they still possess the same properties of the
substances making them up. (b) (c)
18. Answers may vary
Sample Answer: Using your periodic table (a)eg of some metals are Ca, K, Mg, Al, Pg, Au
(b) eg of some non-metals are H, S, Cl, N, Ar, and C (c)metalloids or semi-metals are B,
Si, Ge, As
19. d, b, e, a, h, c, f, i, j, g
20. Answers may vary
Sample Answer: (a)an example of chemical change is rusting, cooking food,
photosynthesis and respiration (b) an example of a physical change is freezing water and
boiling a liquid.
21. Answers may vary
Sample Answer: 1.Heat given out or absorbed 2.Light produced 3. gas given off 4. a
colour change 5. a new substance being made or disappearing or noise produced.
22. Answers may vary
Sample Answer: A chemical change makes a new substance that has unique properties
and is difficult to undo.A physical change does not form a new substance and involves a
change in state and is easily undone.
23. elements
24. homeogeneous
25. decomposition
26. metals and non-metals