TEKS Grade 6 Science - 6.5 Diagnostic Elements and Compound
Quiz by Texas Education Agency
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The chemical equation shown represents a reaction that produces fuel for certain cars.
29CO
H2O
H2
CO2
- Q1
The chemical equation shown represents a reaction that produces fuel for certain cars.
CO
H2O
H2
CO2
30s6.5a - Q2
In the chemical reaction shown , the products are best classified as —
one element and one compound
two compounds
two compounds and one element
two elements
30s6.5a - Q3
Some students are using samples of different substances for a lab investigation. They plan to observe the physical properties of each substance and record their observations in a table like the one shown. Which of the substances observed are elements?
S, Fe, O2, Sr, and Al
N2O4, Fe, Sr, and Al
N2O4, O2 and LiF
S, O2, and LiF
30s6.5a - Q4
Which is the BEST example of a pure substance?
air
gold
milk
peanuts
30s6.5a - Q5
The atmosphere of Earth is comprised mostly of oxygen and -
nitrogen
hydrogen
silicon
carbon
30s6.5b - Q6
Organic products are generated from living matter, so therefore these products would be high _________________ content
Helium
Neon
Carbon
Chlorine
30s6.5b - Q7
The data in the table represents the composition of elements in living matter. Which combination of element symbols best relates to the above elements?
None of these
C,Ni,O,He
Ca,Ni,O,H
C,H,O,P,N,S
30s6.5b - Q8
Which of the following is NOT evidence that a new substance is forming in an experiment?
Unexpected Color Change
Solid particles sinking to bottom of test tubes
Smoke from a burning match.
Powder dissolving in a liquid.
30s6.5c - Q9
What conclusion can be made about the four investigations in the table?
None of these
Investigation #1 is a physical change because solids formed from liquids.
Investigation #3 is not a chemical change, because one liquid floats above the other
Investigation #2 is physical change due to gas released
30s6.5c - Q10
A student uses a strip of Zinc (silvery metal) and combines it with hydroelectric acid inside a beaker. As the substances come into contact with one another, the following happens: bubbles form. Which portion of the chemical reaction shows evidence a new substance has formed?
The hydroelectric acid does not react
The liquid in the beaker does not change color
The bubbles provide evidence that a gas is produced
The silver color on the Zinc strip.
30s6.5c
