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Matter, Elements, and Compounds
Matter, Elements, and Compounds
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6th Grade Science: Matter, Elements, Compounds Units 1-4 Review
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45 cards
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Questions
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Answers
1
All of the following answers would be correct EXCEPT —
H — helium
Na — sodium
O — oxygen
C — carbon
2
What do the letters Na and Cl represent in the chemical formula NaCl?
Compounds
Molecules
Elements
Mixtures
3
Nonmetals tend to conduct heat poorly. Metalloids tend to —
conduct heat poorly.
conduct heat well.
not conduct heat.
vary as to how well they conduct heat.
4
Which is the correct number of hydrogen and oxygen atoms present in the chemical formula h
2
0?
There are two hydrogen atoms for every one oxygen atom.
There is an equal number of hydrogen and oxygen.
There are two hydrogen atoms for every four oxygen atoms.
There is one hydrogen atom for every two oxygen atoms.
5
Jo uses a battery, wire and bulb to try and complete a circuit. What physical property is this?
Streak
Luster
Hardness
Conductivity
6
Which of the following properties is characteristic of a metal?
transparent
silver-gray color
poor conductor
floats in water
7
Which of the following is the symbol for chlorine?
C
Cl
Ce
Ch
8
Which column in the above table includes only chemical changes?
A
B
C
D
9
Which of the following is not an element?
Water
Sodium
Nitrogen
Helium
10
A rock will scratch glass but not a steel knife. Using Mohs Hardness Scale, what do you know?
It is harder than calcite, but softer than fluorite
It is harder than orthoclase, but softer than topaz
It is harder than corundum, but softer than gypsum
It is harder than fluorite, but softer than quartz
11
The capability of a substance to be stretched into thin wires without breaking is known as —
luster
conductivity
malleability
ductility
12
Most metals such as nickel and tin tend to melt at —
temperatures below zero degrees Celsius.
low temperatures.
high temperatures.
temperatures close to room temperature.
13
Which is the best evidence that a change in chemical properties has taken place?
Change in size
Temperature change
Color Change
Melting
14
Metalloids such as boron and arsenic tend to be —
good semiconductors only when they are mixed with nonmetals.
poor semiconductors only when they are mixed with metals.
good semiconductors.
poor semiconductors.
15
What would be a good title for the following list: Luster, Ductile, Conductivity, Malleability
Physical Properties
Chemical Properties
Observable Properties
Reactive Properties
16
A chemical change is:
a phase change.
a temperature change.
reversible.
permanent.
17
Which of these models best represents the element neon as a gas?
Model D
Model C
Model A
Model B
18
The volume of a key is 5 mL and the mass is 39.5 g. What is the density?
19.30 g/mL3
8.90 g/mL3
7.90 g/mL3
2.70 g/mL3
19
Nonmetals such as selenium and oxygen typically —
conduct electricity well.
must be unstable to conduct electricity.
do not conduct electricity.
conduct electricity poorly.
20
The chemical symbol Ca represents —
calcium
carbon
chlorine
cesium
21
How the surface of a mineral appears when it reflects light is known as ―
streak
conductivity
luster
hardness
22
The metal density data in the table is best displayed as a bar graph because —
the density changes based on where the metal was mined
density of gold is dependent upon the density of aluminum
copper density decreases when it comes in contact with water
the density of different metals can be easily compared
23
The volume of a cube is 3cm
3
and the mass is 12 grams. What is the density?
2.25 g/cm3
0.4 g/cm3
4.0 g/cm3
36 g/cm3
24
Which of the following statements are characteristics of an element?
II, IV
I, IV
II, III, IV
I, III
25
What conclusion can be made after observing fizzing and bubbling?
Only a physical change happened.
A chemical reaction produced a solid.
No chemical reaction took place.
A chemical reaction produced a gas.
26
Which of the following is true about metals?
They are usually less reflective in luster than metalloids.
They are usually better conductors than nonmetals.
They are usually less malleable than nonmetals.
They are usually more brittle than metalloids.
27
How many different elements make up this compound: COFeHNCoBNa
10
8
9
11
28
Which of the following substances is a compound?
Co
K
NH3
C
29
Which of the following is a physical property?
Chemical composition
Oxidation
Malleability
Reactivity
30
What is a valid conclusion based on the Melting and Boiling Point table?
The melting points increase as you move down the table.
The melting points decrease as you move down the table.
The boiling points increase in a predictable pattern.
There are no patterns of data in the table.
31
According to the table, most mass of living organisms is made up of which two elements?
Oxygen and carbon
Oxygen and Nitrogen
Nitrogen and Others
Hydrogen and Oxygen
32
What is the best procedure for disposing of unknown chemicals?
Pour the chemicals down the drain.
Follow the teacher's instructions for disposal.
Pour the chemicals back into the original containers.
Throw the chemicals in the trash can.
33
The chemical symbol for nitrogen is —
N
Ni
Ne
Na
34
The ability of a substance to be molded and shaped or hammered into sheets without breaking is
ductility
luster
malleability
conductivity
35
Metalloids such as silicon and boron —
always have a metallic luster and are malleable.
may contain characteristics of metals and nonmetals.
are all brittle and ductile.
always conduct electricity.
36
What is the correct order of the lab procedure?
6, 5, 2, 3, 4, 1
6, 4, 2, 3, 1, 5
6, 2, 5, 4, 3, 1
6, 1, 4, 3, 2, 5
37
What physical property do you scratch a tile for?
Streak
Conductivity
Hardness
Color
38
The ability of one mineral to scratch another mineral is determined by the mineral’s —
hardness
streak
streak
luster
39
8 CO + 17 H
2
→ C
8
H
18
+ 8 H
2
O Which substance in the equation represents an element?
H2
C8H18
CO
H2O
40
NCO3 → NO + CO2 The products in the chemical equation are best classified as —
one element and two compounds
two compounds
one compound and one element
two elements
41
Which of the following substances is an element?
KF
Co
CO2
NaS
42
What safety equipment is most vital during an investigation involving a chemical reaction?
Latex gloves
Fire extinguisher
Safety goggles
Beaker tongs
43
Which of the following is a chemical property associated with wood?
floating on water
ability to burn
snapping when bent
having a rough surface
44
The mass is 105 grams. The volume is shown below. What is the density?
3.3 g/mL
3.0 g/mL
.33 g/mL
3500 g/mL
45
Which of the following is a compound?
Fe
Co
H
CO
