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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
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
The ability of one mineral to scratch another mineral is determined by the mineral’s —
streak
streak
hardness
luster
2
A chemical change is:
a temperature change.
a phase change.
permanent.
reversible.
3
According to the table, most mass of living organisms is made up of which two elements?
Hydrogen and Oxygen
Nitrogen and Others
Oxygen and Nitrogen
Oxygen and carbon
4
The chemical symbol for nitrogen is —
Ni
Na
Ne
N
5
Which of the following is a compound?
Co
Fe
H
CO
6
The capability of a substance to be stretched into thin wires without breaking is known as —
malleability
luster
ductility
conductivity
7
What physical property do you scratch a tile for?
Hardness
Color
Conductivity
Streak
8
The volume of a cube is 3cm
3
and the mass is 12 grams. What is the density?
2.25 g/cm3
4.0 g/cm3
36 g/cm3
0.4 g/cm3
9
Which of the following is a chemical property associated with wood?
snapping when bent
ability to burn
floating on water
having a rough surface
10
Which of the following is the symbol for chlorine?
Ce
C
Cl
Ch
11
All of the following answers would be correct EXCEPT —
O — oxygen
Na — sodium
C — carbon
H — helium
12
Which of the following substances is a compound?
NH3
C
K
Co
13
What would be a good title for the following list: Luster, Ductile, Conductivity, Malleability
Reactive Properties
Observable Properties
Physical Properties
Chemical Properties
14
Metalloids such as silicon and boron —
always conduct electricity.
always have a metallic luster and are malleable.
are all brittle and ductile.
may contain characteristics of metals and nonmetals.
15
What safety equipment is most vital during an investigation involving a chemical reaction?
Fire extinguisher
Beaker tongs
Latex gloves
Safety goggles
16
What do the letters Na and Cl represent in the chemical formula NaCl?
Compounds
Molecules
Elements
Mixtures
17
How the surface of a mineral appears when it reflects light is known as ―
streak
hardness
luster
conductivity
18
Which of the following substances is an element?
Co
NaS
KF
CO2
19
Which of the following statements are characteristics of an element?
II, IV
I, IV
I, III
II, III, IV
20
What conclusion can be made after observing fizzing and bubbling?
No chemical reaction took place.
A chemical reaction produced a solid.
Only a physical change happened.
A chemical reaction produced a gas.
21
The ability of a substance to be molded and shaped or hammered into sheets without breaking is
malleability
ductility
conductivity
luster
22
What is the best procedure for disposing of unknown chemicals?
Pour the chemicals down the drain.
Throw the chemicals in the trash can.
Pour the chemicals back into the original containers.
Follow the teacher's instructions for disposal.
23
Which of the following is true about metals?
They are usually better conductors than nonmetals.
They are usually more brittle than metalloids.
They are usually less reflective in luster than metalloids.
They are usually less malleable than nonmetals.
24
Which is the best evidence that a change in chemical properties has taken place?
Temperature change
Color Change
Change in size
Melting
25
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 corundum, but softer than gypsum
It is harder than fluorite, but softer than quartz
It is harder than orthoclase, but softer than topaz
26
Nonmetals tend to conduct heat poorly. Metalloids tend to —
vary as to how well they conduct heat.
conduct heat poorly.
not conduct heat.
conduct heat well.
27
Which is the correct number of hydrogen and oxygen atoms present in the chemical formula h
2
0?
There is an equal number of hydrogen and oxygen.
There are two hydrogen atoms for every one oxygen atom.
There are two hydrogen atoms for every four oxygen atoms.
There is one hydrogen atom for every two oxygen atoms.
28
Jo uses a battery, wire and bulb to try and complete a circuit. What physical property is this?
Conductivity
Streak
Hardness
Luster
29
Which of the following is not an element?
Helium
Sodium
Nitrogen
Water
30
Which of the following is a physical property?
Reactivity
Malleability
Chemical composition
Oxidation
