Exercises 1- Choose the right answer : 1- Digested food is absorbed in the 2- (oesophagus stomach small intestine large intestine) 3- All of the

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1 Exercises 1- Choose the right answer : 1- Digested food is absorbed in the 2- (oesophagus stomach small intestine large intestine) 3- All of the following produce juice to help in the digestion process except (salivary glands liver pancreas- esophagus) 4- Pancreatic juice and bile are poured in the (oesophagus stomach liver duodenum) 5- Which of the following can be existed in a plant cell and can not existed in an animal cell? (Nucleus chloroplast cytoplasm cell membrane) 6- The is an example of unicellular living organisms. (frog snake yeast fungus a bean plant) 7- All the following are properties of living organisms except.(motion sensation nutrition magnetism) 8- All the following can be found in yeast fungus except. (cytoplasm chloroplast nucleus cell wall) 9- The building unit in the body of the living organism is the..(cell tissue organ system) 10- In both animal and plant cells the.. exists. (sap vacuole nucleus cell wall chloroplast) 11- A group of tissues make up.. (a cell an organ a system a body) 12- The group of similar cells that do the same function is called.(an organ a tissue a system a cell wall) 13- They system in the human body is composed of a group of.(organs tissues different cells similar cells) 14- The yeast fungus is used in a lot of industries such as.(making clothes making bread making papers making soda) 15- Which of the following is considered as an organ? (yeast fungus heart epidermis of onion plant bean plant) 16- Air enters the lungs in the process of.. (inhalation exhalation excretion digestion) 17- Air leaves the lungs during the (exhalation inhalation digestion absorption) 18- The common path of food and air is the (nose pharynx diaphragm larynx ) 19- The. Is located inside the lungs, where gas exchange takes place.(alveoli Bronchioles trachea nose) 20- The epiglottis

2 (keeps air out of the trachea keeps food out of the trachea Is the sound producing organ makes enzymes) 21- The organ that is responsible for preventing food from entering the respiratory system is the (trachea alveoli two bronchi epiglottis) 22- The responsible organ for producing the human voice is the.(trachea nose mouth larynx) 23- The muscle that help in breathing is the. (pharynx larynx diaphragm rib cage) 24- Gas exchange during the process of respiration occurs in the.(trachea nose mouth alveoli) 25- The is the organ of the human respiratory system.(heart stomach lungs liver) 26- are examples of producers. (Algae reptiles fungi birds) 27-. Are examples of decomposers. (Algae Reptiles Fungi Birds) 28- A hawk is an example of.. (producers consumers decomposers all of the previous) 29- Chloroplasts are found in. (producers consumers decomposers all of the previous) 30- Bread mold fungus is a. (producer consumer decomposer all of the previous) is considered the factory of food in plants. (flowers leaves stem roots) 32- Plants use.. in the process of photosynthesis. (oxygen nitrogen carbon dioxide) 33- All of the following living organisms are producers except... (green algae maize plant bread mold wheat plant) 34- All of the following are necessary for photosynthesis process except (carbon dioxide starch sunlight water) is a product of photosynthesis in plant. (Nitrogen gas oxygen gas Energy carbon dioxide gas) 36- To dissolve the green colour of cholorophyll, we put the plant leaf in..(lime water hot water alcohol sodium hydroxide) 37- Are examples of consumers except.(cows lion sheep maize plants) 39-Force is an effect that change.. (speed of object - State of object - Rest of object - All of the previous)

3 40-Force measuring unit is the :.. (kilogram - Meter - Newton - Second) 41-Electric fan rotates by the effect of.. force. (water pushing - Air pushing - Motor pushing - Hand pushing) 42-Wind mills move by the pushing force of (the hand - The motor - The wind - The water) 43-Sail boats move on the surface of river Nile by the force of pushing. (water - Wind - Ropes - Motors) 44- is one of the applications that depend on force in rising heavy objects. (crane - Blender - Wheel barrow - Electric fan) 45-The kite can fly by the effect of.. (water pushing force - Air pushing force - Motor pushing force - Hand pushing force) 46-The wheel barrow moves by the effect of. (water pushing force - Air pushing force - Hand pushing force - engine pushing force) 47-The scientist who discovered the measuring unit of force is. (Isaac Netwon - Ahmed Zewail - Al Hasan Ibn El Haitham - Ibn El Nafis) 48-The balloon moves upwards by the effect of (water pushing force - Gases pushing force - Gases stopping force - Water stopping force) 49-To make an electric circuit we need. (a switch a battery a connecting wires all of the previous) 50-Static electricity is formed by.. objects. (rotating - pushing - rubbing - vibrating) 51-. is a type of electricity that is produced due to the formation of the electric charges on a body. (Static dynamic Light - Sound) 52-Which of the following groups are considered as renewable resources of energy? 53-(wind, water falls, rising and ebb tides natural gas, sun, rising and ebb tides coal, petroleum and natural gas sun, petroleum and ground heat) 54- Which of the following is considered as another example for non-renewable resources of energy? (sea - Water - Sunlight - Coal - wind) 55-- Solar energy helps in the formation of

4 (clouds - Rain - Wind - All of the previous) 56- wind mills move by the pushing force of. (The hand - The motor - The wind - The water) 57- All of the following are from the non-renewable resources of energy except. (wind - Coal - Petroleum oil - Natural gas 2-Complete the following statements : 1-The digestion Process is the changing the food from complex form into a simple one to let the body get benefited. 2-The aesophagus allows the food to pass from the pharynx. to the stomach 3-Bile and gastric are examples of digestive juices in the human body. Small intestine is divided into ileum and duodenum 4-Diaphragm Muscle helps the mechanism of respiration. 5-Exchange of gases occurs in alveoli between alveoli and blood capillaries 6-Man needs the process of respiration to get energy needed to do all body functions. 7-The exchange of gas takes place inside the human body through the respiratory System. 8- respiratory system. is the system that provides the human body with oxygen gas and takes away Co 2 gas and water vapor. 9-The diaphragm separates between the chest cavity and abdominal cavity. 10-When the diaphragm muscle contracts It moves down wards and the thoracic cavity increases. 11-The volume of the thoracic cavity increase in the inhalation Process and decrease in the exhalation process. 12-oxygen gas enters during inhalation process, while carbon dioxide gas moves out side the lungs during exhalation process. 13-Each lung contains of alveoli that have thin walls and they are surrounded by blood capillaries where gas exchange Takes place. 14- Blood capillaries are found in the nose and warm up the inhalation air. 15-The nose contains hair to filter the inhaled air. 16-The epiglottis closes the trachea during swallowing 17-Trachea has cilia to sweep out the dirt incomplete rings to be opened all of the time 18-Living organisms are classified into multi cellular and unicellular 19-Each living cell has an oval shaped body which is called nucleus 20-The fluid in which all the cell components are suspended is called the cytoplasm 21-The cytoplasm is surrounded by cell membrane 22-The chloroplast exists in the plant cells.

5 23-The cell wall characterizes the plant cell than the animal cell. 24-The plant cells are characterized by the presence of cell wall and chloroplast 25-An example of unicellular organisms is yeast fungus 26-The yeast fungus can not be seen by naked eye. 27-The economic importance of the yeast fungus is making bread and making alcohol 28- Water + carbon dioxide. Sunlight starch + oxygen chlorophyll 29-The products of photosynthesis process are starch and oxygen 30-In the photosynthesis process, carbon dioxide gas is absorbed. 31-The plant respires all the day, but it makes photosynthesis process at day light. 32-Green leaves are the factory of food in the plant 33-Decomposers used to increase soil fertility. 34-Consumers are living organisms depending on plants to get their food. 35-The living organisms which are responsible for decomposing remains of living organisms are known as decomposers 36-The force is the effect that changes the state of an object from rest to motion. 37-Electric, cars and under ground are from technological applications the depend on the effect of force in moving objects. 38-Balloon moves upwards by the effect of air pushing force. 39-Cranes and electric ladder are from technological applications that their operation depend on the effect of force in rising of heavy objects. 40-A movable ladder contains gears That transfer the motion. 41-Energy is the ability to do work. 42-From the forms of energy kinetic, light, heat. 43-In the electric lamp, electric energy changes into light Energy. 44-Sound originates due to vibrations. 45-In the motor of a car, electric energy changes into kinetic Energy. 46-Light energy changes into electric energy in solar cells. 47-In electric lamp electric energy changes to light energy. 48-In electric fan electric energy changes to kinetic energy. 49-We get electricity energy from the solar call. 50-The main source of energy on the earth s surface is the sun. 51-The washing machine produces kinetic energy. 52-Electric is the energy produced by the dry cells. 53-When tuning fork vibrates, it produces sound this means that sound originates from the vibration of the object 54-The energy produced on rotation of dynamo coil is electric energy. 55-Passing of an electric current in an electric lamps produces light energy

6 3-W.S.T. 1. A liquid secreted in the mouth and helps in starches digestion saliva 2. A juice is secreted by the liver and affects fats digestion. ( bile.) 3. An inverted (u) shaped tube at which the undigested food stored.( large intestine.) 4. An organ in which food is digested partially.( stomach.) 5. A long coiled tube at which food is completely digested and absorbed. ( small intestine.) 6. Part of the small intestine where bile juice and pancreatic juice are poured in.( duodenum.) 7. A substance that is secreted by the liver to digest fats. ( bile.) 8. A chemical substance that helps in the digestion of food. ( enzymes.) 9. An organ which mixes the food with saliva. ( tongue.) 10. A tube that connects the pharynx to the stomach. ( esophagus.) 11. The organ that contains hairs to filter the air from the dust. ( nose.) 12. The voice organ in the human body. ( larynx.) 13. The organ that prevent food from entering the trachea. ( epiglottis.) 14. An elastic membrane that separate between the chest cavity and abdominal cavity.( diaphragm.) 15. A gas which turns line water milky.( carbon dioxide.) 16. An organ where gas exchange takes place.( alveoli.) 17. The building unit of the living organism. ( cell.) 18. A dark oval body inside the cytoplasm of the living cell. ( nucleus.) 19. A gelatinous liquid that Surrounds the nucleus of the living cell and contain some structures. ( cytoplasm.) 20. A vacuole in the plant cell. ( sap vacuole.) A group of organs that work together ( system.) A unicellular organism used in making bread and alcohol. ( yeast fungus.)

7 23. Small organelles that spread in the cytoplasm of the plant cells and make photosynthesis process (chloroplast.) 24. A gas used in photosynthesis process ( carbon dioxide.) 25. A gas produced in photosynthesis process. ( oxygen..) 26. Living organisms that make their own food ( producers..) 27. Living organisms depending on producers to get their food. ( consumers..) 28. Living organisms get their food through decomposing the organic wastes. ( decomposers..) 29. The path of energy transference in the form of food from a living organism to other living organism.( food chain..) 30. A group of food chains that represent the flow of energy through living organisms.( food web..) 31. The measuring unit of force. (Newton ) 32. parts existing in the machines to transfer the motion( gears ) 33. The effect that changes the state of the objects.( force ) 34. A type of electricity that is produced due to accumulation of the electric charges on a body.(static electricity ) 35. The electric current that flows in the wire in one direction. (current electricity ) 36. A closed path of the electric current.(electric circuit ) 4-Put ( ) or (x) 1- The large intestine stores undigested food. ( ) 2- The tongue mixes food with saliva in the mouth. ( ) 3- Absorption of food takes place in the stomach ( x ) 4- Sun is the main source of energy on the surface of the earth. ( ) 5- Plant grows in presence of sunlight. ( ) 6- Wind is one of non-renewable resources of energy. ( x ) 7- Sun and petroleum from renewable resources of energy. ( x ) 8- Car motor works by natural gas or benzene. ( ) 9- The sun provides us with light only. ( x ) 10- Natural gas is considered as the cleanest type of fuel. ( ) 11- Wind mills change the wind energy into electric energy. ( ) 12- The sun is one of the main factors in the formation of fuel ( )

8 13- The sources of energy are renewable resources only. ( x ) 14- small bits of paper are attracted to a rubbed plastic ruler ( ) 15- The electricity is divided into three types. ( x ) 16- Static electricity is the type of electricity that is produced due to the accumulation of the electric charges on a body. ( ) 17- Dynamic electricity is the electric charges that flow through connecting wires for long distances forming electric current. ( ) 18- Electricity can be generated by a Lemon and two similar metals ( x ) 5-G.R.F. 1) We should chew food well. To keep the digestive system healthy 2) Bile is very important. Because it helps to digest fats 3) -When a person chews a piece of bread, it tastes sweet. Because it changes to sugar You should breath by the nose not the mouth. Because it contains: hair, mucous &blood capillaries. 4) Food does not enter the trachea during swallowing. Because the epiglottis that closes trachea. 5) Presence of cilia and cartilaginous rings in the trachea. To get ride of the strange objects outside trachea 6) The walls of the alveoli and blood capillaries are thin. To allow gas exchange 7) Cells of leaves in plants have a green color. Because it contains chloroplast 8) The heart is considered an organ. Because it contains of tissues

9 9) The green plants are called producers. Because they make their food 10) Chloroplasts are very important for the plant (producers) Because it absorbs sunlight 11) Decomposers have a great economical and environmental importance. Because they get ride of wastes & are used in a lot of industries 12) Food spoils if it was left out side the refrigerator for a long time. Because of the effect of decomposers 13). Force is an effect that changes the state of an object. Because it changes the state of an object from rest to motion or from motion to rest 14) Pulleys are important in machines. Because it make the motion easy 15) The kite fly in the sky. Due to the effect of air pushing 16) All food chains begin with producers. Because they make their food 17) Green Algae are considered at producers. Because they make their food 6-Label the diagram This drawing represent 7- Compare the structure of the plant cell, animal cell and yeast fungus in the opposite table Comparison Plant cell Animal cell Yeast fungus Nucleus Cytoplasm Chloroplast x x Cell wall x Cell membrane x vacuole

10 8-- Form a food chain ending by you. 9--Look at the picture then answer the following : what do man do by the lever? Rise the weight What is the benefit of the lever in your point of view? Save the effort 10-Mention the function of each of the following : 1- pulley :makes the motion easy 2- Gear: transfer the motion 3- Crane : rise the heavy objects 11-What happens when?: Sun rays fall on a lens that is put over a piece of paper. The light energy changes into heat energy