Science (changes in matter,electricity,household circuitry)

Question 1 of 45

Medal-premium 1

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

Select one of the following:

  • True
  • False

Question 2 of 45

Medal-premium 1

during a chemical reaction, energy:

Select one or more of the following:

  • is taken in

  • is given out

  • remains the same

Question 3 of 45

Medal-premium 1

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

Select one of the following:

  • breaking up.....into atoms

  • combining...into compounds

  • absorbing....into atoms

Question 4 of 45

Medal-premium 1

the atoms ____ themselves to form the products

Select one or more of the following:

  • rearrange

  • recombine

  • break

  • divide

Question 5 of 45

Medal-premium 1

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?

Select one of the following:

  • 50

  • 550

  • 300

  • 250

Question 6 of 45

Medal-premium 1

A chemical reaction is used to describe a chemical equation

Select one of the following:

  • True
  • False

Question 7 of 45

Medal-premium 1

No atoms are created or destroyed in a chemical reaction

Select one of the following:

  • True
  • False

Question 8 of 45

Medal-premium 1

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

Select one of the following:

  • solid...liquid...gas

  • gas...liquid...solid

  • liquid....gas...solid

  • liquid...solid...gas

Question 9 of 45

Medal-premium 1

Atoms and molecules are said to be in a constant______

Select one of the following:

  • motion

  • arrangement

  • order

  • state

Question 10 of 45

Medal-premium 1

in a solid the atoms are:

Select one or more of the following:

  • packed closely together in a regular pattern

  • move around eachother

  • held and spun around in fixed positions

  • have weak attractive forces

  • have strong attractive forces

  • have a definite shape and volume

  • does not have a fixed volume

Question 11 of 45

Medal-premium 1

If a solid is heated the particles_____________________________________________________

Select one of the following:

  • gain energy and start to vibrate more

  • slow down

  • break down

  • combine

Question 12 of 45

Medal-premium 1

in a liquid the atoms are arranged in a fixed pattern

Select one of the following:

  • True
  • False

Question 13 of 45

Medal-premium 1

liquids can flow because:

Select one of the following:

  • they have fixed atoms

  • they can move around one another

  • they are closely packed

  • they have strong attractive forces

Question 14 of 45

Medal-premium 1

in a gas the atoms are:

Select one or more of the following:

  • widely spaced and move freely

  • able to fill up any container quickly

  • slow

  • combined together

Question 15 of 45

Medal-premium 1

solid to gas is the process of ________

Select one or more of the following:

  • boiling

  • sublimation

  • freezing

Question 16 of 45

Medal-premium 1

electricity is produced by flow of

Select one or more of the following:

  • electric charges

  • electric current

  • atoms

  • energy

Question 17 of 45

Medal-premium 1

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

Select one of the following:

  • positive.....to negative

  • negative.....to positive

Question 18 of 45

Medal-premium 1

Electric current is defined as:

Select one of the following:

  • the rate of flow of electric charges

  • the rate of flow of electric current

  • the rate of flow of electricity

Question 19 of 45

Medal-premium 1

the SI unit for electricity is ampere (A)

Select one of the following:

  • True
  • False

Question 20 of 45

Medal-premium 1

electric currents are measured by

Select one of the following:

  • ammeters

  • voltmeters

  • generators

  • cellphones

Question 21 of 45

Medal-premium 1

Ammeters must be connected in parallel

Select one of the following:

  • True
  • False

Question 22 of 45

Medal-premium 1

ammeter may get damaged if

Select one or more of the following:

  • connected the other way round

  • connected in parallel

  • connected from positive to negative

  • connected in series

Question 23 of 45

Medal-premium 1

electric circuits can be divided into two main categories:

Select one of the following:

  • series and parallel

  • ammeter and voltmeter

  • electric charges and electric current

Question 24 of 45

Medal-premium 1

An electric circuit is a path along which electric charges move

Select one of the following:

  • True
  • False

Question 25 of 45

Medal-premium 1

A series circuit forms a double loop

Select one of the following:

  • True
  • False

Question 26 of 45

Medal-premium 1

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

Select one of the following:

  • same

  • different

  • opposite

Question 27 of 45

Medal-premium 1

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

Select one of the following:

  • True
  • False

Question 28 of 45

Medal-premium 1

what is a parallel circuit?

Select one of the following:

  • A circuit that splits into two or more branches

  • A circuit that forms a single loop

  • A circuit with multiple batteries

  • A colorful circuit with balloons

Question 29 of 45

Medal-premium 1

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

Select one of the following:

  • True
  • False

Question 30 of 45

Medal-premium 1

A source is

Select one or more of the following:

  • a battery

  • component from the where the current starts

  • wires and bulbs in a circuit are a part of the source

Question 31 of 45

Medal-premium 1

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

Select one or more of the following:

  • a battery

  • an electric cell

  • a bulb

  • a toy

Question 32 of 45

Medal-premium 1

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

Select one of the following:

  • voltage

  • power

  • Resistance

Question 33 of 45

Medal-premium 1

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

Select one of the following:

  • higher

  • lower

  • decreased

Question 34 of 45

Medal-premium 1

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

Select one of the following:

  • True
  • False

Question 35 of 45

Medal-premium 1

SI unit of voltage is ______

Select one of the following:

  • volt (V)

  • Joules

  • ohm

Question 36 of 45

Medal-premium 1

The voltage of a source of electrical energy is called

Select one of the following:

  • electromotive force

  • potential difference

  • energy

  • cupcake

Question 37 of 45

Medal-premium 1

Resistors can only be added in series.

Select one of the following:

  • True
  • False

Question 38 of 45

Medal-premium 1

which of the following have heating elements inside them?

Select one or more of the following:

  • hair dryer

  • cellphone

  • cranes

  • toaster

  • iron

  • magnet

Question 39 of 45

Medal-premium 1

The heating element is usually made up of ________________

Select one of the following:

  • nichrome wire

  • conductor

  • plastic

  • coiled coil

Question 40 of 45

Medal-premium 1

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

Select one of the following:

  • positive

  • negative

Question 41 of 45

Medal-premium 1

which of the following are uses of electromagnets

Select one or more of the following:

  • used in scrapyards

  • check thickness of paint in a car

  • televisions

  • kettle

  • remove splinters from body

Question 42 of 45

Medal-premium 1

improper use of electricity can result in:

Select one or more of the following:

  • electrocutions

  • electric fires

  • electric shocks

  • dehydration

  • high blood pressure

Question 43 of 45

Medal-premium 1

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

Select one of the following:

  • True
  • False

Question 44 of 45

Medal-premium 1

some dangerous situations of using electricity are:

Select one or more of the following:

  • damp conditions

  • damaged insulation

  • over-loading

  • sleeping near it

  • sitting on it

Question 45 of 45

Medal-premium 1

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.

Select one or more of the following:

  • 2/3 kW and 14 cents

  • 1/3 kW and 6 cents

  • 1/2 kW and 21 cents

Icon_fullscreen

Science (changes in matter,electricity,household circuitry)

Maheen  Zahid
Quiz by , created over 1 year ago

Changes in matter,household circuitry and electricity quiz

Eye 42
Pin 0
Balloon-left 0
Tags
Maheen  Zahid
Created by Maheen Zahid over 1 year ago
Close