حل أوراق عمل في العلوم باللغة الإنجليزية للصف الرابع - الفصل الثاني (2)

Grade 4 Week 1

U2-L1 Forms of Energy

Term 2، ST name: ، 4 \

1-Energy released when links between particles are

A-(....2....)Nuclear energy

broken or created. 2- Energy released when links between particles that makeup matter are broken.

B-(...1....)

الطاقة النووية Chemical Energy

الطاقة الكيميائية

C-(......5 ..) Sound energy

3-Come from movement of charged particles or chemical energy that stored in batteries.

الطاقة الصوتية، D-(....4....) Thermal energy، الطاقة الحرارية

4-Internal energy of an object due to energy of motion of its particles. 5-Its produced by vibration of material.

E-(...3.....) Electrical energy، الطاقة الكهربائية، F-(...6.....) Light energy، الطاقة الضوئية

6-Energy form of electromagnetic radiation that is visible to the human eye.

Q2: Choose correct answer for each one:

1- The lightbulb changes electrical energy into light energy. This is an example of?

a- Energy transformation b- Energy exchange

c-Energy being created

2- A child hitting a drum creates vibrations that produce:

a-Light energy، b- Thermal energy، c- Sound energy

3- What happens when energy transfers in a system. a- About 75% of the energy is transferred, while the rest is destroyed. b- All of the energy is transferred in different amounts to different forms. c- Half of the energy is transferred in different amounts to different forms.

4- Which statement is true? a- A lamp changes heat energy to electrical energy. b- A lamp changes light energy to electrical energy. c- A lamp changes electrical energy to light and heat energy.

5-Electrical energy is transferred when an iron is plugged into an outlet. What

type of energy does the electrical energy become:

b-Thermal energy، c-Nuclear energy

6-Thermal energy is: a- The external energy of an object due to its potential energy b- The internal energy of an object due to the kinetic energy of its particles c-The internal energy of an object due to the stored energy of its particles

7-When a person plucks the string on a guitar, .......... energy is

transferred into، a-Sound energy

8-Rashed placed a metal spoon in a glass of hot soup. When he touched the spoon, he find that it was hot. Rashed knew that the spoon was not hot when he put it in the soup. Which sentence best explains how this happened? a-Spoons begin heating up when they are placed into liquids. b-Thermal energy is transferred from the soup to the spoon. d-Heat is created when metals and glasses combine with one another.

9- Energy that transferred from the Sun to Earth is

...............L...ig......h...t ............ and ............T...h....e...rm......a...l...... energy. Heat

Q3-A-Write correct number under each picture :اكتب الرقم الصحيح من أنواع الطاقة لكل صورة اسفلها

1-Thermal Energy، 2-Chemical Energy، 3-Sound Energy، 4-Nuclear Energy، 5-Electricity Energy، 6-Light Energy

B-Write correct number of each kind of energy from( 1- 6) in correct box:

....2...... and .....4...... Are Potential or stored Energy طاقة مخزونة

...1، ...3، ، and......6... are، Kinetic

Or Energy of Motion.طاقة حركة

Sound & Light الاجابة

Unit 2/ L 2 ST name: ................................................................................................................ 4 \ ............

1- Substance where sound can travels.

A-(....2......) Sound waveموجة صوت

2- Wave that transfers energy through a material and spreads outward in all directions from a vibration. 3- Back and forth motion.

4- Devices used light from Sun to produce electricity.

B-(......3 ....) Vibration اهتزازات

C-(....1.....) Medium الوسط، موجات طولية، D-(......5....) Longitudinal wave

5- Wave vibrating in the same direction that the energy moves.

E-(......4.....) Solar cell خلية شمسية

1-Astronauts in space cannot talk to each other unless they use a radio to speak. Why is this?

a-The force of gravity is too strong to allow sound waves to travel.

b-There is no air in space, so there is no medium to carry sound waves.

c-It is very loud in space, so they can only hear each other through a radio.

2-To stop a drum from producing sound, you would:

a-Hit it harder

b- Hit it softer

c- Stop it from vibrating

3-Sound ......... travel through outer space.

A- Does not، b-Does

4-How does sound energy travel? a-in strings

b-in waves، c-in pulses

5- A pom-pom launcher ........ صوت دوي القاذفة

a-Transfers kinetic energy to thermal energy.

b-Transforms kinetic energy to sound energy.

c-Transforms stored energy to energy of motion.

6- Why are sounds not heard in space? لماذا لا يُسمع الصوت في الفضاء؟

a-Space is too cold for sound to travel.

b- Energy cannot travel in space.

c- Space is a vacuum with few particles to travel through.

7-Light travels as tiny of ................. energy

a- Particles b-Pulses نبضات

8- Human can only see the ............ on the electromagnetic spectrum.

a-Visible light، b-Ultraviolet، c-Microwaves

9- Solar cells are also called ..........

a- Gamma ray، b- photovoltaic cell

10 -Different forms of radiation all together are known as the

b- Electromagnetic spectrum، c-Infrared

11 -A fire truck's siren and flashing lights are examples of __ and __ energy.

a-Heat and Nuclear، b-Light and sound، c-Chemical and Thermal

12- Form of energy that allows you to see objects is ...........

a-Heat، b- Light، c- Sound

Q3: Arrange these items according to the speed of sound:

Juice، ( ......2.........)، Steel Pan، ( ......1.........)، Wind، ( ......3.........)، Liquid، Solid، Gas

Q4: Compere between Sound & Light : قارن بين الصوت والضوء

Choose correct answer for each: اختر الإجابة الصحيحة لكل نقطة

اختر الإجابة الصحيحة لكل نقطة

Sound، Light، Moving، a- Beams، b- Wave، c- Conduction، Wave Type، a-Mechanical, Longitudinal waves، b-Electromagnetic, Transvers waves

a-Mechanical, Longitudinal waves. b-Electromagnetic, Transvers waves

Media الوسطa-need b-not need

a-need b-not need

Travels media اختر كل إجابة صحيحة

a-Solid c-Gas

b- Liquid d- Vacuum

a- Solid c-Gas، Electricity

Unit 2/ L 3

ST name: ................................................................................................................ 4 \ ............

1-The flow of electricity through a conductor.

A-(...2.....) Conductor

2-Material through which electricity flows easily.

موصل، B-(...3....) Insulator

3-Material that slow or stops flow of electricity.

عازل، C-(...1.....) Electric current

4-The path through which electric current flow.

تيار كهربي، D-(...6.....) Short circuit

5-An object that resists flow of energy in electrical circuit.

E-(...5.....)، قُصر الدارة، Resistor

6-Path has little or no resistance that connects two ends of an electrical source. 7-Is an electric circuit that produce magnetic field.

مقاومة، F-(...4.... ) Circuit، دارة كهربية، G-(...7 ) Electromagnet

Q2: Answer each one correctly:

مغناطيس كهربي

A-Put correct number near each materials if its Conductors(1) or Insulators(2):

1- 1-Conductors:موصل، (.....2.....) Wood خشب-، (......1.....) Steel فلاذ-، 2-Insulators: عازل

(...2F...-.(....) P....las) tic بلاستيك-

(......2.... ) Wool صوف- (....1......) Copper نحاس-

(...1......) Metal ) معدن

Q3- Put correct number near each part of circuit? Then put Series or Parallel in blank

(....3......) Wire، (.....2.....) Resistor، Series، (....1......) Voltage source، Parallel

Q4: Choose correct answer:

1-A fan is plugged into an extension cord. The extension cord is plugged into a

wall outlet. How does the extension cord help the fan work?

a-It makes fan more powerful.

b-It transfers sound energy to fan.

c-It transfers electric currents from outlet to fan.

2- A flow of electrical charges is known as ......

a-Electrical current، b-Static electricity، c-Voltage، d-Resistance

3-In an electric circuit, a battery can act as a .....

a-Conductor، b-Voltage source، c-Insulator، d-Resistor

4- You are asked to design a product that will change electrical energy to heat energy.

Choose the item you would research while developing your product.