WSs Answer G7- 2013

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Al Tamayoz School

Answers to worksheets Trimester3

Science Department

Year Level: 7th Grade Date: May 20th , 2013

Chemistry QuestionsCheckpoint

1-Describe what is meant by melting point. ( )

2- Identify the freezing point of wax. ) (

60

1- Define the terms boiling and evaporation. (, )

Boiling (-: (

evaporation( ):-

4- Describe what happens to the particles when water boils. ( (

. .

Think

1- State the scientific term used to describe when:

:-

a a liquid changes into a gas

b a gas changes into a liquid

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c a solid changes directly into a gas

2- Explain what would happen to an unlit wax candle on a 40Cday.(40C (

-.

3- State the opposite term to: ( (a- melting X

b- Condensation X

4- Describe three changes of state that may occur in the home.

( )

a-( ) ( ) :

b-( ) :

c-( ) ( ) :

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2-:

1()X(

2()B(

3()C(

3-)(.

3

)b(x

)c()c(

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)(.

4:

QuestionsCheckpoint

1-Explain what the particles in a substance do when heated to take upmore space.

( (

:

2- Describe two uses of expanding liquids. ( (

a- " : "

b- " : "

3- Identify what may be used to prevent a gas expanding whenheated.

( (

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Think1- a- Identify two problems that expanding solids can cause.

( )

1-

2-b- Explain how each problem is overcome. (

)

1-

2-.

2-State why you think mercury or colored alcohol is used in thermometers instead ofcolored water. (

)( )

3-Identify the temperatures at which water does the opposite of what othersubstances do.

()

" "4-Describe how the fish in a lake can survive when the lakefreezes.

( (

. .

,.

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5-5555555555555555555555555

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-5555555555555555555555555555555555555555555555555555555555555.

-)

).

-: .

-.

Subject: Science STRAND The Living WORLD Grade (7 )

Photosynthesis

Respiration

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/ )/(

)())

Subject: Science STRAND:The MICROBIAL WORLDGrade ( 7 )

Title: Worksheet1 Microbes1-:

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1-.

2-

3-4-

5-.

6-.

2- Outline two features that make a virus different from other

microbes...

.............................................

.............................................

3-, ,

................................

.........................................................................................................

4-Modify the following statements so that they are correct.

a Bacteria consist of a cell wall, cell membrane but doesn't have anucleus.

b Some bacteria cause diseases and Some bacteria have benefits.

c Bacteria have three basic shape.

)5-Describe three ways that protists maymove) .8

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:

:

):(.

7--

....................................................

-.

:

1-:

,

2-:

8-.

- ..9--.

) ()(...

-

Subject: Science STRAND: EcosystemsGrade ( 7 )

Title: Worksheet2 Photosynthesis andRespiration( (

A- State whether the following statements are true or false:1-false2-true3-false)(4-true

B- Explain why chlorophyll is necessary for photosynthesis.

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CD

::

E+)//(

F++

G-

H-:

1-2-

)+(3-Y

)(



)CO2 --------- H2O(

)(

1-

2-)(

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3-)++(

4-+ ( / )

5-

+ ( / )..............................)++(..

6-

7-

)//( /

8-

9-

10-+ ( / / )

11-

)++(..

12-

+..............................+ ( / )

13-14-

)+++(



11

)(

30o

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1-...........................................

2-........................................

3-...................................................4-..................................

5-

)+++(

6-+ ( / )

7-

+..............................+ ( / )

8-

9-

10-

11-(

:)+++(

12-+ ( / / )

13-



12

1-

2- 3-

4-

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A-+ ( / / )B-(Starch(

1-

2-

3-

4-

5-6-)( /

7-

+..............................+ ( / )

8-

......................................



13

1-

)(

2-

3-

4-

)(

2

1

5-..

6-

7-

)(

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):Milky(

1-

2-1

3-

4-

+ ( / )5-

)++(

6-

+ ( / )..............................)++(..

7-2

8-

9-)(

10-)(

11-

12-

13-)()(/

Worksheet 01: Lunar and Solar EclipsesDate: / / 2013

Choose the correct answer :-

1. Which of the following term best fits into the blank? An eclipse is defined as

an astronomical event that occurs when one celestial object moves

_______________ another, partially or fully obscuring it from view.

A: next to B: in back of C: into the shadow D: on top of

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2. Which type of eclipse does the following statement describe? When the moon

travels between the Sun and the Earth, blocking the Sun's light from the

Earth in the middle of the day.

A: Lunar Eclipse B: Solar Eclipse C: Neither

3. Do eclipses occur on other planets?

A: Yes B: No

4. Both solar and lunar eclipses can be broken down into which of the followingdifferent types of eclipses? Check all that apply.

A: total eclipse B: annular

eclipse

C: partial eclipse D: hybrid eclipse E: All

5. Which type of eclipse occurs when the Sun and the Moon are exactly in line,

but the size of the Moon appears to be smaller than the Sun?

A: total eclipse B: partial eclipse C: hybrid eclipse D: annular eclipse

6. Which type of eclipse occurs when the Sun is completely obscured the by

moon? The Sun is replaced by only a dark silhouette of the Moon. The Corona

of the sun is still visible, but only faintly.

A: total eclipse B: partial eclipse C: annular eclipse D: hybrid eclipse

7. What type of eclipse occurs in between a total and annular eclipse?

A: hybrid eclipse B: partial eclipse C: neither

8. When can a solar eclipse occur?

A: anytime B: during a new moon C: during a full

moon

D: in the last quarter of a full

moon

9. What is the definition of eclipse?

A: total combustion B: cease to exist C: shadow D: none of the above

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Worksheet 02: The Planets of the solar systemDate: / / 2013

:1-:

2-:

( )( )

:

-

,

The Planets and Moons of Our Solar System1. This planet has one more moon than Earth. The planet is called

________Mars________. It has ________moons.2. This planet has the most moons. The planet is called __Saturn_. It has

___30___ moons.

3. This planet is closest to the Sun. The planet is called __Mercury_. It has___no___ moons.

4. This planet has the second most moons. The planet is called __Jupiter __. It

has __28__ moons.

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5. This planet is third from the Sun. The planet is called _Earth__. It has__one___moon.

6. This planet is the farthest planet from the Sun. The planet is called__Pluto__. It has _five ____ moons.

7. This is the closest to Neptune. The planet is called Uranus__. It has __21___moons.

Fill in the blanks below with words from thisbox:

Neptune

asteroids

dinosaurs

gas giants

Mars

Jupiter

water

temperature

Saturn

Venus

planetoids

comets

Uranus

tail

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The Solar System

The __solar__ system is the group of planets that _orbit __our Sun. There are ___nine__ known planets in our solarsystem, but some observers think they have spotted others

beyond the orbit of __Pluto____.The Terrestrial Planets

Mercury, Venus, Earth, and Mars are called _terrestrial ___planets because they have rocky surfaces. _Earth _, ofcourse, is the planet we live on. _Mercury ____ is theclosest planet to the sun. ________________, which is also

called the evening star, has a ______________ of 500 degreesCelsius and clouds of sulfuric acid. _________________ isknown as the red planet. Recently, frozen ______________was discovered there.

The Gaseous Planets

Jupiter, Saturn, Uranus, and Neptune are called

__________________ because they are big and made mostly ofgas. _______________ is the largest planet in the solar system.

_________________ is famous for its rings. _______________ alsohas rings but is not as famous as Saturn. _____________ is namedafter the god of the sea

Worksheet 04: The Planets of the solar systemDate: / / 2013

:

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19

*

*

*

*

*

*)(

*:

-

-:

*

*

*

.

*

*

*:

-

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Worksheet 5: The Planets of the solar system

Date: / / 2013

1.

200100

30100

2.""

.

1-

( )

3..

.-:76

19101986

Bopp:19774000

5- Draw the structure of a comet

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worksheet 6: The Planets of the solar systemDate: / / 2013

:

" / "

:..

22

:

)

(

:

.

S:

:

.

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Worksheet 7 : The Planets of the solar systemDate: / / 2013

1

:

:

2:.

3:

4:

Bopp-

5::

6:

Subject: Science STRAND PHYSICAL WORLDGrade ( 7 )23

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1-Draw the symbol for the following electricalcomponents:

switch

Conductor

globe

cell

Ammeter

2-drawcircuit diagram for the following circuit:

24
http://images.google.ae/imgres?imgurl=http://www.lakewoodconferences.com/direct/dbimage/50092731/AC___DC_Ammeter___Voltmeter.jpg&imgrefurl=http://www.lakewoodconferences.com/catalog/26/759/page5/measurement_and_meter.html&h=360&w=360&sz=24&hl=ar&start=39&usg=__aFIAZZ8nP0iQMOOE-Fz4PGKNCvM=&tbnid=KARBg-Vmke4cDM:&tbnh=121&tbnw=121&prev=/images%3Fq%3D%25D8%25A3%25D9%2585%25D9%258A%25D8%25AA%25D8%25B1%26start%3D20%26gbv%3D2%26ndsp%3D20%26hl%3Dar%26sa%3DN

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circuit diagramcircuit

3- The diagram shows the circuit symbol for a _____.

A- closed switch B- battery

C- globe D- voltmeter

4 Question 4

25

AB

C

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. The diagram shows a circuitsymbol.

What does this symbol represent?

. A Battery

. B Switch relay

. C Electric compass

. D Variable resistor

1- :

Current

Voltage

Measured with/

Ammeter in series Voltmeter in parallel

Measured in/

Amps, A Volts, V

Circuit symbol of measuring device

Which circuit below shows how to measure voltage and current for a single globe in a circuit? 2-

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3-Moving electric charges are described as:

A- AmpsB- ampereC- ammeterD- current

1- Consider the circuit below.

- Identify which other globes would go out ifa Globe B blows. C

b Globe D blows. E & F

c Globe A blows. B, C, D, E, F & G

2-The circuit below contains

A- 3 globes in parallel.B- 3 globes in series.

C- globe in series with 2 globes in parallelD- 2 globes in series with one globe in parallel.

3-

)(),(

.

Draw a circuit diagram with acell and two resistors (all inseries), and a voltmetermeasuring the voltage acrossone of the resistors only.

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4 Question 4

. The drawing shows a hairdryerand a circuit diagram drawn byMohammed.

M

s w i t c h 1

s w i t c h 2

m a i n s p o w e r s u p p l y

m o t o r

h e a t e r

)( Which switch(es) must be closedfor the heater to work?

12 A 1and 2

2 B 2only

12 C 1or 2

D None

5 Question 5

What is one advantage of havingthe motor and heater in parallel?

.A

It will be more expensive tooperate.

.

BIf the heater fails you can still dry your

hair.

. C Fewer switches are needed.

. D The heater can operate on its own.

28

1

22

1

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6 Question 6

. The diagram shows two circuits for

the heated rear-windows of cars.

What are the types of circuit?

1 1 Circuit 1 Circuit 2

A series series

B parallel parallel

C parallel series

D series parallel

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Circuit 1 1Circuit 2 2

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7 Question 7

V3.

.

Nora built a puzzle circuit withthree identical bulbs (globes) anda 3V battery. She covered up the

connections to the bulbs with a

piece of card.

3 V b a t t e r y

A

B

C

c a r d

.,

,.

A,,A.

BC..

All the bulbs were lit but theirbrightness was different. She

showed her puzzle to Fatima, herteam member, who had to

discover the circuit!

Fatima first removed bulb A,observed what happened to theother two bulbs, then replacedbulb A. She repeated this withbulbs B and C. Her results are

shown below.

BC A

C,AB

B,AC

Bulb removed Observations

AB and C stayed

on

BC went off; A

stayed on

C B went off; A

30

V3

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7( .......) Question 7 (continued(

,.

)a( Complete the circuit below, usingyour knowledge of series andparallel circuits.

.

S. )b(

Nora wants to add a switch in thecircuit so that all bulbs could beturned off at once.

Place an S on the circuit where theswitch can be placed.

8 Question 8

)(.

Identify one common applicationthat uses parallel circuit(s.(

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WSs Answer G7- 2013