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WorksheetsChemical Changes Test Review
Total questions: 52
Worksheet time: 6hrs 22mins
A physical change:
DOES result in a new substance.
DOES NOT result in a new substance.
A chemical change:
DOES result in a new substance.
DOES NOT result in a new substance.
A _______________ change may change an object's size, mass, shape or texture.
chemical
physical
Signs of a _______________ change may include a change in smell, color, or temperature.
chemical
physical
If two liquids are mixed together and a thermometer shows a temperature increase, this change is a ____________________.
chemical change
physical change
A student drops an antacid tablet into a liquid. How does the student know a chemical change occurred?
the solid tablet dissolves
a mixture is produced
a gas is produced (bubbles)
the solid tablet sinks
When a cake is baked in an oven, a chemical change has occurred when:
the batter sticks to the pan
the cake batter changes color
steam rises from the warm cake
the pan increases in temperature
When you blow air into a balloon and it changes size, it is going through a _________________ change.
chemical
physical
When a piece of paper is crumbled into a ball and changes shape, it is going through a _______________ change.
chemical
physical
Baking chocolate chip cookies in the oven is an example of a ______________ change.
chemical
physical
When a bike rusts, it goes through a ________________.
chemical change
physical change
When a banana decays, it goes through a _____________________.
chemical change
physical change
Sanding down a piece of wood is an example of a ______________________.
chemical change
physical change
When leaves decay, they go through a _____________________.
chemical change
physical change
When logs burn and turn into ash, it is an example of a _________________________.
chemical change
physical change
Ice cubes melting is a _________________ change.
chemical
physical
Every time a chemical reaction occurs, a _______________ is created.
bubble or fizz
smoke
temp change
a new substance
A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda ( NaHCO3 ) onto the spill. Which observation would provide the best evidence that a chemical reaction occured?
The baking soda and hydrochloric acid combined, and bubbles formed.
The baking soda absorbed the hydrochloric acid.
Some of the baking soda dissolved in the hydochloric acid.
The hydrochloric acid evaporated, leaving only the baking soda.
What key words, when present in a question about chemical reactions, might indicate a chemical change is occuring? Check all that apply.
Bubbling
Fizzing
Dissolving
Evaporating
Which scientific observation, shown in the chart, indicates that a chemical reaction has NOT occurred?
Number 1
Number 2
Number 3
Number 4
Carbon dioxide ( CO2 ) forms when coal burns in the presence of oxygen. Which of these is the BEST evidence that a chemical reaction occurs when coal burns?
The shape of the coal changes
Oxygen is present
A new substance is produced
Coal is made up of more than one element
What evidence can you use to infer that a chemical reaction has occurred here?
A dark solid formed on the zinc metal
The zinc metal remained silver-colored and shiny
The CuSO4 solution turned blue when the zinc metal was added
None of these
Observe the chemical equation shown here. What evidence of a chemical reaction is present when 2NO is added to O2 ?
A gas is present
The total number of atoms remains unchanged
The state of matter remains the same
A brown gas is produced
Review the data in the chart provided. Which statement below is NOT supported by this data?
A chemical reaction takes place between magnesium and hydrochloric acid.
A gas is released in Test Tube 2.
The substances in both test tubes are reactive.
Energy is released in Test Tube 2.
What type of mixture is a salad
homogeneous
heterogeneous
What type of mixture is kool aid
homogeneous
heterogeneous
Identify the following: helium
homogeneous
heterogeneous
compound
element
Identify the following: air
homogeneous
heterogeneous
compound
element
Sweet Tea, everything is mixed evenly and looks the same.
Heterogeneous Mixture
Homogeneous Mixture
Chicken noodle soup
Heterogeneous
Homogeneous
Cereal with milk
Heterogeneous
Homogeneous
oil
water
syrup
Which of the following particulate models has a lower density?
Model A
Model B
Neon is colorless, a poor conductor of heat and is not able to be stretched. How would it be classified?
Nonmetal
Metalloid
Metal
None of the above
Where are the nonmetals located on the Periodic Table?
On the right
On the left
On the stairstep
Sodium (Na) is a silvery metallic element with an extremely high melting point. This element is a __________ and will be found on the __________ side of the Periodic Table.
nonmetal, right
metal, right
nonmetal, left
metal, left
A physical property that describes the ability of a material to be permanently reshaped without breaking or cracking
Brittle
Luster
Malleability
Matter
Which state of matter has the lowest kinetic energy?
solid
liquid
gas
none
Which state of matter has the highest kinetic energy?
solid
liquid
gas
none
______ has a definite shape and a definite volume
Solids
Liquids
Gases
_____ have definite volume but no definite shape.
Solids
Liquids
Gases
