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: If your teacher’s last
name is Elliott, then you are doing the wrong assessment.
---This assessment is only for
students of other teachers.
---If your teacher is Mr. Elliott, then please go back to the
website and click on the first assessment link instead. Thanks!
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. | Some candle wax
melted. | b. | The marshmallow became sticky on the inside. | c. | The marshmallow developed a brown crust on the
outside. | d. | Metal in the fork became warmer. |
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2.
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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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3.
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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. | Heat is given off | b. | A new substance is produced | c. | A loud noise is heard | d. | An explosion
occurs |
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4.
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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. | New types of atoms are
created | b. | Phase of matter changes from solid to liquid to gas
always occur | c. | You start with
reactants, end up with product(s), and new substances are formed. | d. | Temperature increases, gas is released, and explosions
happen. |
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5.
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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. | gas is released and the substances change from solids to
liquids | c. | new types of elements are formed and heat is
released | d. | new chemical bonds are formed at the valence electron
level |
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6.
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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 stirred egg | d. | a rotting
egg |
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7.
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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. | physical changes appear | c. | chain reaction occurs | b. | chemical change
happens | d. | nuclear reaction happens |
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8.
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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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9.
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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. | new bonds form between atoms | c. | phase changes from solid to liquid | b. | new elements are formed | d. | temperature
increases |
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10.
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The chemical
process of burning coal produces energy and ash. | | |
The ash produced is BEST described as a...?a. | substance with properties
different from coal. | b. | new state of matter. | c. | new type of
element. | d. | substance with properties identical to
coal. |
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