Worksheets7th grade Matter and Energy Review 25
Total questions: 25
Worksheet time: 13mins
Wadding up paper is an example of which kind of change?
Physical Change
Chemical Change
Both Physical and Chemical Changes
Nothing Changed
What does a change in color of a substance indicate?
reaction change
irreversible change
Chemical change
Physical Change
Students study a burning candle. What type of changes occur in the burning candle?
Both the burning of the wick and melting wax are physical changes
Both are chemical changes
Burning of the wick is a physical change and the melting wax is a chemical change
Burning the wick is a chemical change and the melting wax is a physical change.
Which example is a physical change?
wood burning
ice melting
nail rusting
frying an egg
Mechanical digestion in the mouth physically breaks down food. Which is an example of mechanical digestion?
teeth biting into a donut
salivary glands breaking down the donut
stomach acids breaking down sugars
Enzymes in the small intestines breaking the chyme down further
The process of recycling aluminum is what kind of change?
Chemical change because a new metal is formed
a chemical change because the old can is changed into a new can
Physical Change because the material remains the same
Chemical change due to the heating of the can.
Which of the following is a chemical symbol from the periodic table?
1234
CCCC
Br
H2O
Elements are defined as
pure substances that cannot be broken down
three or more atoms bonded together
are formed when two or more elements are bonded together
complicated matter
How many atoms of oxygen are in the water H2O?
3 atoms
1 atom
zero
2 atoms
Elements are organized into a system that is called a
Chemical formulas
Chemical Properties
Mother Nature's ingredients
The Periodic Table
Which statement correctly compares elements to compounds?
molecules only contain two different atoms
compounds are formed from atoms, while elements are only formed from molecules
Molecules that contain only one kind of atom are compounds; molecules that contain more than one kind of atom are elements
molecules that contain only one kind of atom are pure elements, while molecules that contain more than one kind of atom are compounds
O2 is an element
True
False
C6H12O6 is the chemical formula for glucose. How many Carbon atoms are in glucose?
24
12
6
1
How would you classify a molecule of water, H2O?
element
mixture
compound
solution
Which of the following is an element?
Al
CO
NaCl
H2O
CH4 is an example of a
Chemical equation
chemical formula
chemical reaction
chemical symbol
When you mix sugar with water, which one is the solvent?
Sugar
water
both
neither
The chemical formula for salt is NaCl. Is salt an element or a compound?
element
compound
Lemonade is a
homogenous mixture
a heterogenous mixture
a solvent only
a solute only
Silver Nitrate AgNO3, is a chemical compound used in photography. How many atoms of oxygen make up this chemical compound?
1
2
3
5
What happens when ice is being heated?
change is physical properties
Change in chemical properties
the reduction in matter
the reduction of heat
Which of the following is a chemical property of wood?
having a rough surface
making a snapping sound when bent
ability to burn
floating
which two things are part of an aqueous solution?
solute and solvent
oil and water
salt and water
oil and vinegar
Which of the following is the universal solvent
alcohol
bleach
water
vinegar
which of the following actions does not affect the rate of dissolution?
Agitation
Temperature
universal measurement
surface area
