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Revision on concept 2.2

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Ahmed Abdelnaser

Egypt

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scienceVersion en ligne Revision on concept 2.2 par Ahmed Abdelnaser 1 Any matter has thermal energy, because ........................................ a its molecules always move b it has fixed shape c its molecules don't move d it has fixed volume 2 If heat transfers to a lower temperature object, its molecules will ...................... a stop moving b move slower c move faster d not be affected 3 Heat transfers from ....................... object to ....................... object. a cooler - hotter b hotter - cooler c bigger - smaller d smaller - bigger 4 The handle of an electric iron is made of ........................ a iron b thermal insulator material c metal d thermal conductor material 5 All the following are properties of heat, except .......................... a it is an essential component of life on Earth b it cannot be lost but it is only transferred c it flows from a cooler object to a hotter object d it flows from a hotter object to a cooler object 6 Heat is transferred through solids by .................. a radiation only b conduction and convection c conduction only d radiation and convection 7 Heat is transferred by convection through ..................... a solids only b solids and gases c space only d liquids and gases 8 Heat is transferred by radiation through .................... a solids only b solids and liquids c liquids only d gases and space 9 In the opposite figure, heat transfers between the two metal cubes from cube (........) to cube (.........) by .................. a A-B-conduction b A-B-convection c B-A-convection d B-A-conduction 10 Metals ........................ a don't allow heat to flow through them b allow heat to flow through them c are heat insulators d are bad conductors of heat 11 Meteorologists are scientists who study ..................... a weather b rocks c water d cells 12 Heat is transferred from a hot slide in a sunny day to your hand by ................ when you touch it. a radiation only b radiation and convection c conduction only d conduction and convection 13 Heat can be transferred from an electric heater to your body by ............... when you stand near it. a radiation b conduction c radiation and conduction d conduction and convection 14 Heat is transferred through copper and iron by .................. a radiation only b radiation and convection c conduction only d conduction and convection 15 When you put a plastic cup of water in a freezer, the water freezes and its mass .................. a decreases b increases c decreases to half d doesn't change 16 Matter ....................... , it just changes from one state to another. a neither be created nor destroyed b can be created and destroyed c can't be created but destroyed d can be created but can't destroyed 17 When you melt 100 grams of chocolate bar, its mass after melting is almost ....................... 100 grams. a a lot less than b a little more than c a lot more than d equal to 18 Matter can be changed from one state to another, ............. a by losing the thermal energy only b by gaining the thermal energy only c by losing or gaining the thermal energy d by keeping the thermal energy without change 19 ..................... is the best material to make handles of cooking pots, as it doesn't warm fast. a Iron b Plastic c Wood d Copper 20 The mass of a substance doesn't change when this substance changes from one state into another, this is the law of conservation of ............... a mass b energy c volume d state 21 When an object stops on the top of a ramp, it stores ....................... energy. a kinetic b light c potential d sound 22 When a car goes down on a ramp, its .................. energy changes to ................ energy. a kinetic - potential b potential - kinetic c sound - potential d light - potential 23 Due to the friction between a moving object and a flat road, the ................ energy of the moving object changes into ............... energy. a b c d 24 Due to the friction force between a moving object and a flat road, the speed of a moving object .................... a decreases then increases b not be affected c decreases d increases 25 If there are a small car and a truck moving down on the same ramp, ................ a the car moves faster than the truck b the car and the truck move with the same speed c the truck moves slower than the car d the truck moves faster than the car 26 To make clothes, we can use ................ a steel b concrete c flexible fabric d rocks 27 Plastic ................ a is a liquid material b burns easily c is originated from petroleum d is a gaseous material 28 To make bridges we can use ................. a flexible fabric b concrete c smart clothes d glass 29 Concrete ...................... a becomes liquid after it dries b consists of rock, sand and water c controls your body temperature d is originated from petroleum 30 All the following are properties of petroleum, except ................. a it is a liquid material b it often resists burning c it burns easily d it is the original material of plastic

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scienceVersion en ligne

par Ahmed Abdelnaser

Any matter has thermal energy, because ........................................

If heat transfers to a lower temperature object, its molecules will ......................

Heat transfers from ....................... object to ....................... object.

The handle of an electric iron is made of ........................

All the following are properties of heat, except ..........................

Heat is transferred through solids by ..................

Heat is transferred by convection through .....................

Heat is transferred by radiation through ....................

In the opposite figure, heat transfers between the two metal cubes from cube (........) to cube (.........) by ..................

Metals ........................

Meteorologists are scientists who study .....................

Heat is transferred from a hot slide in a sunny day to your hand by ................ when you touch it.

Heat can be transferred from an electric heater to your body by ............... when you stand near it.

Heat is transferred through copper and iron by ..................

When you put a plastic cup of water in a freezer, the water freezes and its mass ..................

Matter ....................... , it just changes from one state to another.

When you melt 100 grams of chocolate bar, its mass after melting is almost ....................... 100 grams.

Matter can be changed from one state to another, .............

..................... is the best material to make handles of cooking pots, as it doesn't warm fast.

The mass of a substance doesn't change when this substance changes from one state into another, this is the law of conservation of ...............

When an object stops on the top of a ramp, it stores ....................... energy.

When a car goes down on a ramp, its .................. energy changes to ................ energy.

Due to the friction between a moving object and a flat road, the ................ energy of the moving object changes into ............... energy.

Due to the friction force between a moving object and a flat road, the speed of a moving object ....................

If there are a small car and a truck moving down on the same ramp, ................

To make clothes, we can use ................

Plastic ................

To make bridges we can use .................

Concrete ......................

All the following are properties of petroleum, except .................