Towheed International SchoolName:__________ Grade: Six, Section: ( )

Reinforcement Revision worksheetsSkills Worksheet

It’s All Mixed UpComplete 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?

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

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: ______________________

• Light passes right through.

• Particles do not separate in a centrifuge or a filter.

• Upon heating, the liquid evaporates, and a crystal powder remains.

Beaker C: ______________________

• Liquid scatters light.

• Liquid centrifuged into two different-colored layers.

• Particles were left behind in the filter.

Beaker B: ______________________

• Light passes right through.

• Particles do not separate in a centrifuge or a filter.

• Upon heating, the liquid evaporates, but no residue remains.

• The particles could not be separated by any other physical changes.

Beaker D: ______________________

• Liquid scatters light.

• Liquid passes through a filter without 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 solute alloys

solution mixture suspensions

compound metalloids

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.

________________________________________________________________

________________________________________________________________

________________________________________________________________

________________________________________________________________

CONCEPT MAPPING

. Use the following terms to complete the concept map below:

pure substances physical or chemical chemical

solutions suspensions compounds

States of MatterUSING 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 condensation endothermic

evaporation gas liquid

sublimation viscosity 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 ElectricityUSING 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 series circuit electrical insulators

electric power electrical voltage

static electricity

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

ReinforcementMake a State-mentComplete 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

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

Skills

Workshee

t

Directed Reading B

Section: Changes of StateENERGY AND CHANGES OF STATE

Draw a line from each term to the matching number on the picture.

freezing evaporation condensation melting

State of matter Description

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

Name________________________________Class____________________Date____________________