Science (changes in matter,electricity,household circuitry)

Maheen  Zahid
Quiz by Maheen Zahid, updated more than 1 year ago
Maheen  Zahid
Created by Maheen Zahid over 5 years ago
45
0

Description

Changes in matter,household circuitry and electricity quiz

Resource summary

Question 1

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

Question 2

Question
during a chemical reaction, energy:
Answer
  • is taken in
  • is given out
  • remains the same

Question 3

Question
When reactants are mixed,energy is used for ______ the molecules of the reactants into ________
Answer
  • breaking up.....into atoms
  • combining...into compounds
  • absorbing....into atoms

Question 4

Question
the atoms ____ themselves to form the products
Answer
  • rearrange
  • recombine
  • break
  • divide

Question 5

Question
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?
Answer
  • 50
  • 550
  • 300
  • 250

Question 6

Question
A chemical reaction is used to describe a chemical equation
Answer
  • True
  • False

Question 7

Question
No atoms are created or destroyed in a chemical reaction
Answer
  • True
  • False

Question 8

Question
At room temperature gold is _____,water is _____ and oxygen is ________
Answer
  • solid...liquid...gas
  • gas...liquid...solid
  • liquid....gas...solid
  • liquid...solid...gas

Question 9

Question
Atoms and molecules are said to be in a constant______
Answer
  • motion
  • arrangement
  • order
  • state

Question 10

Question
in a solid the atoms are:
Answer
  • 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

Question
If a solid is heated the particles_____________________________________________________
Answer
  • gain energy and start to vibrate more
  • slow down
  • break down
  • combine

Question 12

Question
in a liquid the atoms are arranged in a fixed pattern
Answer
  • True
  • False

Question 13

Question
liquids can flow because:
Answer
  • they have fixed atoms
  • they can move around one another
  • they are closely packed
  • they have strong attractive forces

Question 14

Question
in a gas the atoms are:
Answer
  • widely spaced and move freely
  • able to fill up any container quickly
  • slow
  • combined together

Question 15

Question
solid to gas is the process of ________
Answer
  • boiling
  • sublimation
  • freezing

Question 16

Question
electricity is produced by flow of
Answer
  • electric charges
  • electric current
  • atoms
  • energy

Question 17

Question
conventional current is the flow of electric charges from the _______ end to the ________ end
Answer
  • positive.....to negative
  • negative.....to positive

Question 18

Question
Electric current is defined as:
Answer
  • the rate of flow of electric charges
  • the rate of flow of electric current
  • the rate of flow of electricity

Question 19

Question
the SI unit for electricity is ampere (A)
Answer
  • True
  • False

Question 20

Question
electric currents are measured by
Answer
  • ammeters
  • voltmeters
  • generators
  • cellphones

Question 21

Question
Ammeters must be connected in parallel
Answer
  • True
  • False

Question 22

Question
ammeter may get damaged if
Answer
  • connected the other way round
  • connected in parallel
  • connected from positive to negative
  • connected in series

Question 23

Question
electric circuits can be divided into two main categories:
Answer
  • series and parallel
  • ammeter and voltmeter
  • electric charges and electric current

Question 24

Question
An electric circuit is a path along which electric charges move
Answer
  • True
  • False

Question 25

Question
A series circuit forms a double loop
Answer
  • True
  • False

Question 26

Question
the current flowing through each electrical component in a series circuit is _____
Answer
  • same
  • different
  • opposite

Question 27

Question
disadvantage of series circuit is that there is less current flowing in each branch rather than that flowing out of the circuit
Answer
  • True
  • False

Question 28

Question
what is a parallel circuit?
Answer
  • 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

Question
Advantage of Parallel circuit is that the current flowing through each component is same.
Answer
  • True
  • False

Question 30

Question
A source is
Answer
  • a battery
  • component from the where the current starts
  • wires and bulbs in a circuit are a part of the source

Question 31

Question
the force needed to push electric charges round a circuit is supplied by:
Answer
  • a battery
  • an electric cell
  • a bulb
  • a toy

Question 32

Question
the amount of energy supplied by a source of electrical energy to each unit of electric charge is called ________
Answer
  • voltage
  • power
  • Resistance

Question 33

Question
If more electric cells are connected in series,a ________ voltage will be obtained
Answer
  • higher
  • lower
  • decreased

Question 34

Question
Electrical energy is converted into light and heat when flowing through a bulb
Answer
  • True
  • False

Question 35

Question
SI unit of voltage is ______
Answer
  • volt (V)
  • Joules
  • ohm

Question 36

Question
The voltage of a source of electrical energy is called
Answer
  • electromotive force
  • potential difference
  • energy
  • cupcake

Question 37

Question
Resistors can only be added in series.
Answer
  • True
  • False

Question 38

Question
which of the following have heating elements inside them?
Answer
  • hair dryer
  • cellphone
  • cranes
  • toaster
  • iron
  • magnet

Question 39

Question
The heating element is usually made up of ________________
Answer
  • nichrome wire
  • conductor
  • plastic
  • coiled coil

Question 40

Question
In electro-plating the plating metal is connected to the __________ terminal
Answer
  • positive
  • negative

Question 41

Question
which of the following are uses of electromagnets
Answer
  • used in scrapyards
  • check thickness of paint in a car
  • televisions
  • kettle
  • remove splinters from body

Question 42

Question
improper use of electricity can result in:
Answer
  • electrocutions
  • electric fires
  • electric shocks
  • dehydration
  • high blood pressure

Question 43

Question
The consumer unit consists of damp conditions,main switch and electric bells.
Answer
  • True
  • False

Question 44

Question
some dangerous situations of using electricity are:
Answer
  • damp conditions
  • damaged insulation
  • over-loading
  • sleeping near it
  • sitting on it

Question 45

Question
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.
Answer
  • 2/3 kW and 14 cents
  • 1/3 kW and 6 cents
  • 1/2 kW and 21 cents
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