Science (changes in matter,electricity,household circuitry)

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A chemical reaction takes place when water is put to a boil passing electricity through a heater immersed in the water.

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during a chemical reaction, energy:

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When reactants are mixed,energy is used for the molecules of the reactants into __

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the atoms ____ themselves to form the products

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If the amount of energy required to break the atoms up is 250 and the the amount of energy released when atoms recombine is 300,what is the amount of energy exchanged with the surroundings?

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A chemical reaction is used to describe a chemical equation

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No atoms are created or destroyed in a chemical reaction

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At room temperature gold is ___,water is _ and oxygen is ______

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Atoms and molecules are said to be in a constant______

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in a solid the atoms are:

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If a solid is heated the particles_____________________________________________________

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in a liquid the atoms are arranged in a fixed pattern

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liquids can flow because:

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in a gas the atoms are:

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solid to gas is the process of ________

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electricity is produced by flow of

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conventional current is the flow of electric charges from the _ end to the __ end

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Electric current is defined as:

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the SI unit for electricity is ampere (A)

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electric currents are measured by

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Ammeters must be connected in parallel

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ammeter may get damaged if

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electric circuits can be divided into two main categories:

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An electric circuit is a path along which electric charges move

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A series circuit forms a double loop

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the current flowing through each electrical component in a series circuit is _____

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disadvantage of series circuit is that there is less current flowing in each branch rather than that flowing out of the circuit

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what is a parallel circuit?

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Advantage of Parallel circuit is that the current flowing through each component is same.

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A source is

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the force needed to push electric charges round a circuit is supplied by:

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the amount of energy supplied by a source of electrical energy to each unit of electric charge is called ________

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If more electric cells are connected in series,a ________ voltage will be obtained

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Electrical energy is converted into light and heat when flowing through a bulb

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SI unit of voltage is ______

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The voltage of a source of electrical energy is called

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Resistors can only be added in series.

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which of the following have heating elements inside them?

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The heating element is usually made up of ________________

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In electro-plating the plating metal is connected to the __________ terminal

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which of the following are uses of electromagnets

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improper use of electricity can result in:

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The consumer unit consists of damp conditions,main switch and electric bells.

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some dangerous situations of using electricity are:

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If it takes a 4kW kettle 10 minutes to boil the water in it,how much energy is used?
Calculate the cost of electricity if each unit costs 21 cents.

Changes in matter,household circuitry and electricity quiz

Science (changes in matter,electricity,household circuitry)

A chemical reaction takes place when water is put to a boil passing electricity through a heater immersed in the water.

during a chemical reaction, energy:

When reactants are mixed,energy is used for ______ the molecules of the reactants into ________

the atoms ____ themselves to form the products

If the amount of energy required to break the atoms up is 250 and the the amount of energy released when atoms recombine is 300,what is the amount of energy exchanged with the surroundings?

A chemical reaction is used to describe a chemical equation

No atoms are created or destroyed in a chemical reaction

At room temperature gold is _____,water is _____ and oxygen is ________

Atoms and molecules are said to be in a constant______

in a solid the atoms are:

If a solid is heated the particles_____________________________________________________

in a liquid the atoms are arranged in a fixed pattern

liquids can flow because:

in a gas the atoms are:

solid to gas is the process of ________

electricity is produced by flow of

conventional current is the flow of electric charges from the _______ end to the ________ end

Electric current is defined as:

the SI unit for electricity is ampere (A)

electric currents are measured by

When reactants are mixed,energy is used for the molecules of the reactants into __

At room temperature gold is ___,water is _ and oxygen is ______

conventional current is the flow of electric charges from the _ end to the __ end