WorksheetsDIAGNOSTIC TEST
Total questions: 60
Worksheet time: 33mins
Which of the following best describes science?
A collection of opinions
A systematic study of the natural world through observation and experimentation
A study of supernatural events
A study of literature
The main purpose of scientific investigation is to:
Prove personal beliefs
Discover facts and establish principles
Support myths
Entertain people
Which of the following is not a scientific skill?
Observation
Measuring
Guessing
Classifying
Which of the following is an example of a scientific attitude?
Being biased
Being curious
Being careless
Being impatient
The first step in the scientific method is usually:
Conducting an experiment
Stating a hypothesis
Making an observation
Drawing a conclusion
A hypothesis is:
A final conclusion
A temporary explanation that can be tested
A scientific law
A fixed fact
Which of these represents a scientific law?
The law of reflection
The theory of evolution
The atomic theory
The cell theory
Repeating an experiment several times helps to:
Waste materials
Confirm results
Which of the following tools is used to measure temperature?
Thermometer
Barometer
Stop clock
Meter rule
The metric unit for measuring mass is:
Meter
Litre
Gram
Second
A scientist who studies chemical substances and their reactions is called a:
Biologist
Chemist
Physicist
Geologist
Which of the following statements about science is true?
Science deals with personal opinions
Science is based on evidence
Science does not require observation
Science is fixed and unchanging
The use of scientific knowledge for practical purposes is called:
Engineering
Technology
Experimentation
Hypothesis
Which of these is an example of scientific investigation?
Testing the boiling point of water
Arguing about weather
Reading a storybook
Watching a movie
One characteristic of a good scientist is:
Dishonesty
Impatience
Curiosity
Laziness
Which of the following is a metal?
Sulphur
Iron
Carbon
Iodine
Non-metals are usually:
Good conductors of heat
Malleable
Poor conductors of electricity
Ductile
Which of the following is not a property of metals?
Which of these metals is a liquid at room temperature?
Mercury
Copper
Sodium
Zinc
The property of metals that allows them to be drawn into wires is called:
Brittleness
Ductility
Hardness
Malleability
Which of the following is a use of aluminium?
Making glass
Making cooking utensils
Making fertilizers
Making ink
Which of the following metals is used for making electrical wires?
Copper
Zinc
Iron
Lead
Which of the following is not a non-metal?
Sulphur
Phosphorus
Silicon
Oxygen
Non-metals generally form:
Basic oxides
Acidic oxides
Neutral oxides only
Amphoteric oxides
Which of the following is a metalloid?
Silicon
Sodium
Chlorine
Sulphur
Which of the following is true about metalloids?
They have both metallic and non-metallic properties
They are always shiny
They are very soft
They are poor conductors
A metal that is used in making jewelry is:
Iron
Silver
Magnesium
Zinc
The metal used for galvanizing iron is:
(a)
Which non-metal is used in making matches?
Phosphorus
Oxygen
Nitrogen
Sulphur
Which non-metal supports combustion?
Hydrogen
Oxygen
Sulphur
Nitrogen
Which of the following is a property of non-metals?
Shiny surface
Ductile
Low density
Good conductor
Which of these metals is used in making coins?
Copper
Sodium
Magnesium
Potassium
The non-metal that is used to disinfect water is:
Carbon
Chlorine
Nitrogen
Sulphur
Which of the following metals reacts vigorously with water?
Sodium
Iron
Copper
Lead
A metalloid commonly used in computer chips is:
Silicon
Phosphorus
Iron
Sulphur
The property of metals that makes them produce sound when hit is called:
Sonority
Ductility
Hardness
Malleability
The gas produced when a metal reacts with an acid is:
Oxygen
Carbon dioxide
Hydrogen
Nitrogen
Non-metals are generally found:
On the left side of the periodic table
On the right side of the periodic table
In the center of the periodic table
Scattered throughout the periodic table
Which of the following statements about metals is true?
Metals gain electrons to form ions
Metals lose electrons to form positive ions
Metals do not react with oxygen
Metals are poor conductors
Rusting is a form of:
Dissolution
Corrosion
Crystallization
Oxidation
Rusting occurs mainly in:
Gold
Iron
Copper
Aluminium
Which of the following is necessary for rusting?
Water and oxygen
Carbon dioxide and light
Air and salt
Oxygen and oil
The reddish-brown substance formed on iron after rusting is:
Iron oxide
Iron sulphate
Iron chloride
Iron nitrate
Which of the following metals does not rust easily?
Iron
Copper
Zinc
Lead
Painting iron surfaces prevents rusting by:
Reacting with oxygen
Keeping out air and moisture
Cooling the metal
Increasing oxidation
The process of coating iron with a layer of zinc is called:
Electroplating
Galvanization
Alloying
Painting
Which of the following slows down rusting?
Scratching the surface
Oiling or greasing
Adding water
Exposing to air
Alloying iron with chromium and nickel forms:
Bronze
Steel
Brass
Iron oxide
Corrosion of metals is caused mainly by:
Dry air
Moist air
Oil
Vacuum
Which metal forms a greenish corrosion product called patina?
Iron
Copper
Aluminium
Zinc
Which of these does not help prevent corrosion?
Painting
Applying grease
Soaking in water
Galvanizing
Rusting can be accelerated by:
Salt water
Oil coating
Dry air
Polishing
Which of the following is a chemical method of preventing rust?
Alloying
Painting
Greasing
Varnishing
The symbol equation for rusting is approximately:
Fe + H2O + O2 → Fe2O3·xH2O
Fe + Cl2 → FeCl2
Fe + HCl → FeCl2 + H2
Fe + CO2 → FeCO3
Aluminium does not rust because:
It is too light
It forms a protective oxide layer
It reacts with water
It is a non-metal
When iron nails are placed in boiled water covered with oil, rusting does not occur because:
There is no oxygen
There is no water
There is too much salt
The oil reacts with iron
Which of the following mixtures best prevents rusting in marine (sea) environments?
Iron and copper
Iron and zinc
A scientist who studies the properties of metals and alloys is called a:
Chemist
Metallurgist
Physicist
Geologist
Corrosion control is important because it:
Improves appearance
Reduces material damage and saves cost
Increases oxidation rate
Wastes materials
Which process involves the combination of metals to enhance their properties?
Alloying
Evaporation
Electrolysis
Filtration
