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Worksheets7th grade final Semester 1 final test REVIEW
Total questions: 30
Worksheet time: 14mins
Anything that has mass and takes up space
Matter
Energy
Heterogeneous Mixture
Homogenous Mixture
Water (H2O), Carbon Dioxide (CO2) and Table Salt (NaCl) are all examples of:
Molecules
Elements
Mixtures
Atoms
Soil, salad and salt water are examples of:
Molecules
Atoms
Mixtures
Compounds
Food coloring spreads out slower in cold water than in hot water. This is mainly because:
the food coloring molecules are small
there is less thermal energy affecting the movement of the water molecules in cold water
there is more thermal energy affecting the movement of the water molecules in cold water
cold water is less dense
If you compare a substance in solid form to it's liquid form, you could say that:
the molecules in the liquid are closer together
the molecules in the liquid are farther together
the molecules in solids slide past each other
the molecules in solids are bigger
One example of a chemical change is
Boiling water
Roasting marshmallows
Filtering sand and water
Crushing a can
What is the term is best used for a reaction that releases heat?
Endothermic
Chemical Change
Exothermic
Physical Change
When you cool a sample of gas, what happens to the particles that make up the gas?
The particles move faster
The particles move slower
The particles get smaller
The particles get less dense
On the Periodic Table, elements that are found in the same family (column) share:
Same atomic number
Same atomic mass
Similar properties
ALL the above
Molecules are composed of:
one atom only
two or more atoms
zero atoms
always exactly two atoms
How many atoms of hydrogen are in the following chemical formula: C6H12O6
3
6
12
24
When you heat a sample of a solid, the particles that make up the solid
get bigger and move slower
lose mass and move faster
move further apart and move faster
move closer together and move slower
Which of the following is an example of a chemical property?
state of matter
color
flammability
melting point
A chemical reaction that absorbs energy and therefore decreases in temperature (and feels cold) is described as:
combustion
endothermic
exothermic
unbalanced
The Law of Conservation of Matter (Mass) states that atoms
Can not be created
Can not be destroyed
Can be created but not destroyed
Can not be created nor destroyed
A chemical change is different than a physical change because in a chemical change
chemicals are used
molecules do not physically touch
a new substance is formed and in a physical change no new substance is formed
the change can be seen but in a physical change it cannot
A chemical change is different than a physical change because in a chemical change...
chemicals are used
molecules do not physically touch
a new substance is formed and in a physical change no new substance is formed
the change can be seen but in a physical change it cannot
If more reactants are used in a chemical reaction, more products will be produced. This is because:
More reactants cause the reaction to heat up
More reactants take up the same volume
More reactants have more atoms to react to form more products
Too many products can slow down the reaction
Which of the following is NOT a sign that a chemical change is occuring:
Change in shape
Temperature change
Production of a gas
Production of an odor
What are the reactants in the following chemical equation?
6 CO2 + 6 H2O → C6H12O6 + 6 O2
6 CO2 & 6 O2
6 CO2 & 6 H2O
6 H2O & C6H12O6
C6H12O6 & 6 O2
In which state do the particles have the greatest thermal energy and particle motion? A, B or C
Which of the three states represents a liquid?
Which of the three states has a definite volume, but not a definite shape?
GAS
A
B
C
D
E
SOLID
A
B
C
D
E
Evaporation/Condensation
A
B
C
D
E
Melting/Freezing
A
B
C
D
E
What is the atomic mass of Aluminum?
13
14
27
40
How many protons does Aluminum have?
13
14
27
40
How many neutrons does Aluminum have?
13
14
27
40
