Online Assessment
Instructions
1) Type in your first and last name in the
“Name” box in the top-left corner.
2) Next type in your teacher’s name in
the “ID” box.
3) Then type in your school’s full name in the
“Email” box.
4) Select the best answer for each question.
5) When you
are finished click the “Grade and Submit” button.
6) The grade will be emailed
to your teacher.
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1.
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NOTE: This assessment is only for Mr.
Elliott’s students.
---If you are not one of Mr. Elliott’s students then please go
back to the website and click on the link for other teachers. Thanks!
Reaction indicators are specific events that you can observe during a chemical
reaction. Some of these indicators are displayed below.
Five Chemical Change
Indicators | 1) You may observe a flash of light
2) You may observe foaming
3) You
may hear a sound
4) An explosion may occur
5) Gas may be released | |
However, not every chemical reaction includes all of these
indicators.
Which choice below occurs in ALL
chemical reactions?
a. | temperature increases | c. | new bonds form between atoms | b. | new elements are formed | d. | phase changes from
solid to liquid |
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2.
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When factories release sulfur dioxide
(SO2) into the air, it reacts with water (H2O) molecules which results in
acidic precipitation (acid rain).
Which choice
below BEST describes what happens when SO2 reacts with H2O?
a. | chain reaction occurs | c. | chemical change happens | b. | physical changes
appear | d. | nuclear reaction happens |
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3.
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The chemical
process of burning coal produces energy and ash. | | |
The ash produced is BEST described as a...?a. | new type of
element. | b. | new state of matter. | c. | substance with properties identical to
coal. | d. | substance with properties different from
coal. |
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4.
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Hydrogen
(H) reacts with oxygen (O) to form dihydrogen monoxide (H2O water).
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The properties of H2O are
most likely...a. | different from hydrogen or
oxygen | b. | similar to both hydrogen and
oxygen | c. | similar only to hydrogen | d. | similar only to oxygen |
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5.
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During chemical reactions you can observe specific
events called chemical reaction indicators. Some of these indicators are displayed
below.
Five Chemical Change
Indicators | 1) Change in temperature
2) Change in color
3) Change in odor
4)
Formation of a precipitate
5) Formation of bubbles (gas is released) | |
However, not every chemical reaction includes all of these
indicators.
Which choice below occurs in ALL
chemical reactions?
a. | A loud noise is heard | b. | Heat is given off | c. | A new substance is
produced | d. | An explosion
occurs |
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6.
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A science teacher
demonstrated physical and chemical changes by using a fork to hold a marshmallow over a lit
candle.
Which observation is the BEST evidence of a chemical change?
a. | The marshmallow developed a
brown crust on the outside. | b. | The marshmallow became sticky on the inside. | c. | Metal in the fork became
warmer. | d. | Some candle wax melted. |
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7.
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Copper (Cu) reacts with oxygen (O) to form
copper oxide (CuO). | | |
The properties of CuO (copper oxide)
are most likely...?a. | similar only to copper | b. | different from copper or oxygen | c. | similar only to oxygen | d. | similar to both
copper and oxygen |
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8.
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Due to the number of valence electrons, some
elements will chemically react with other elements.
Select the choice shown below that occurs
in EVERY chemical reaction.
a. | Phase of matter changes from solid to liquid to gas
always occur | b. | Temperature
increases, gas is released, and explosions happen. | c. | New types of atoms are created | d. | You start with reactants, end up with product(s), and new substances are
formed. |
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9.
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| Water is formed when two hydrogen atoms chemically react with
one oxygen atom to form H2O (see diagram below). | | |
This diagram is displaying an event that
occurs in every chemical reaction.
Select the choice below
that correctly identifies this event.a. | powerful explosions occur and precipitates are
formed | b. | new types of elements are formed and heat is
released | c. | new chemical bonds are formed at the valence electron
level | d. | gas is released and the substances change from solids to
liquids |
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10.
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A
student observes actions that occurred in four different eggs. | | |
Which action
below describes only a chemical change?a. | a dropped egg | c. | a cut
up egg | b. | a rotting egg | d. | a stirred
egg |
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