Towheed International School
Name:__________
Reinforcement
Grade: Six,
Section: ( )
Revision worksheets
Skills Worksheet
It’s All Mixed Up
Complete this worksheet after you finish reading the section “Mixtures.”
Label each figure below with the type of substance it BEST models: colloid, compound, element,
solution, or suspension.
Reinforcement continued
6. Why did you label the figures on the previous page as you did?
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PROFESSOR JUMBLE’S CONFUSION
In her lab, Professor Jumble has four shelves labeled “Suspensions,” “Solutions,” “Compounds,”
and “Colloids,” respectively. Last night, the professor set one beaker of clear liquid on each of the
four shelves. When the professor walked into her lab this morning, all four beakers were on the
same shelf, and she didn’t know which was which. She tested each beaker, and the results are
below.
7. Use the test results to help Professor Jumble unjumble the beakers, and write the identity of
each liquid in the blanks.
Beaker A: ______________________
Beaker C: ______________________
• Light passes right through.
• Liquid scatters light.
• Particles do not separate in a
• Liquid centrifuged into two different-
centrifuge or a filter.
• Upon heating, the liquid evaporates,
and a crystal powder remains.
colored layers.
• Particles were left behind in the filter.
Beaker B: ______________________
Beaker D: ______________________
• Light passes right through.
• Liquid scatters light.
• Particles do not separate in a
• Liquid passes through a filter without
centrifuge or a filter.
• Upon heating, the liquid evaporates,
but no residue remains.
• The particles could not be separated
by any other physical changes.
leaving a residue.
Use the terms from the following list to complete the sentences below. Each term may be used only once.
Some terms may not be used.
solvent
solution
compound
solute
mixture
metalloids
alloys
suspensions
1. A pure substance made of two or more elements that are chemically combined is called a(n)
______________________
2. If a spoonful of salt is mixed in a glass of water, the salt is the ______________________
3. Solid solutions of metals or nonmetals dissolved in metals are called
______________________
4. A colloid has the properties of solutions and______________________
5. Particles of two or more substances that are distributed evenly among each other form
a(n).______________________
Valerie placed 1.0 g of salt into one beaker, 1.0 g of soil into a second beaker, and 1.0 g of sugar
into a third beaker. She then added 200 mL of water to each beaker and stirred the contents for
3 minutes. How many solutions did Valerie make? Identify the solvent and solute of each of
the solutions.
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CONCEPT MAPPING
. Use the following terms to complete the concept map below:
pure substances
physical or chemical
chemical
solutions
suspensions
compounds
States of Matter
USING KEY TERMS
Use the terms from the following list to complete the sentences below. Each term may be used only
once. Some terms may not be used.
Charles’s law
evaporation
sublimation
condensation
gas
viscosity
endothermic
liquid
Boyle’s law
1. The drops of water that appear on the outside of a glass of cold juice on a warm day are an
example of ______________________.
2. The way a balloon decreases in volume when the temperature is decreased illustrates
______________________.
3. The change of state from a liquid to a gas is ______________________.
4. Sublimation is a change of state from a solid directly to
a(n) ______________________.
5. In a(n) ______________________ change, energy is added to a substance.
6. One property of liquids is ______________________.
Introduction to Electricity
USING KEY TERMS
Use the terms from the following list to complete the sentences below. Each term may be used only
once. Some terms may not be used.
electric current
electric power
static electricity
series circuit
electrical
electrical insulators
voltage
1. Plastic, glass, wood, and air are examples of good .______________________
2. Electrons moving in a wire make up ______________________ and provide energy to the
things that you use each day.
3. Burglar alarms are best wired using a(n) ______________________.
4. When the voltage is in volts and the current is in amperes, ______________________ is
expressed in watts.
5. When your clothes come out of the dryer stuck together, they are full of
______________________.
Skills Worksheet
Reinforcement
Make a State-ment
Complete this worksheet after you finish reading the section “Behavior of Gases.”
Each figure below shows a container that is meant to hold one state of matter. Identify the state of
matter, and write the state on the line below the corresponding figure. Then write each of the
descriptions listed below in the correct boxes. Some descriptions may go in more than one box.
Particles are close together.
Particles are held tightly in place by
other particles.
Particles break away completely
from one another.
changes volume to fill its container
changes shape when placed in a
different container
State of matter
has viscosity
obeys Boyle’s law
amount of empty space can change
has definite shape
Particles vibrate in place.
does not change in volume
has surface tension
Description
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Directed Reading B
Section: Changes of State
ENERGY AND CHANGES OF STATE
Draw a line from each term to the matching number on the picture.
freezing
evaporation
condensation melting
MELTING: SOLID TO LIQUID
Adding Energy
Read the words in the box. Read the sentences. Fill in each blank with
the word or phrase that best completes the sentence.
melting
endothermic
5. A change of state from a solid to a liquid is
called______________________
6. When energy is gained by something during a change of state,
a(n)______________________ change occurs.
Name ______________________________ Class ___________________ Date __________________
Directed Reading B continued
FREEZING: LIQUID TO SOLID
Removing Energy
exothermic
freezing
7. The melting point of a substance is the same as
its______________________ point.
8. When energy is removed from a substance,
a(n)______________________ change may occur.
EVAPORATION: LIQUID TO GAS
Boiling and Evaporation
change of state
evaporation
9. The particles break away from each other during
______________________.
10. When water boils, a(n)______________________ occurs.
Effects of Pressure on Boiling Point
Circle the letter of the best answer for each question.
11. What happens to the boiling point of a substance when you go higher
above sea level?
a. The boiling point gets higher.
b. The boiling point stays the same.
c. The boiling point gets lower.
d. The substance won’t boil.
Name ______________________________ Class ___________________ Date __________________
Directed Reading B continued
CONDENSATION: GAS TO LIQUID
Circle the letter of the best answer for each question.
12. What is condensation?
a. the change of state from a liquid to a gas
b. the change of state from a solid to a gas
c. the change of state from a gas to a solid
d. the change of state from a gas to a liquid
SUBLIMATION: SOLID TO GAS
Read the words in the box. Read the sentences. Fill in each blank with
the word or phrase that best completes the sentence.
endothermic
sublimation
13. Dry ice changes from a solid to a gas during ______________________.
14. Sublimation is a(n)______________________ change.
CHANGE OF TEMPERATURE VS. CHANGE OF STATE
Circle the letter of the best answer for each question.
15. What happens when the temperature of a substance changes?
a. The speed of the particles stays the same.
b. The speed of the particles changes.
c. The substance always melts.
d. The substance always freezes.
Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Reinforcement
Charge!
Complete this worksheet after you have finished reading the section “Electric
Charge and Static Electricity.”
There are three ways for an object to gain a charge: friction, conduction, and
induction. When it loses its charge, it experiences electric discharge. Label the
following pictures as examples of conduction, induction, friction, or electric
discharge