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year 9 Science Homework Week 4
By Naomi Arthur
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Last updated over 4 years ago
15 questions
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Question 1
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Question 15
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What does ductile mean?
Able to be stretched into a wire
Able to be rolled into thin sheets
Able to conduct electricity
What does malleable mean?
Shiny
Able to be rolled into thin sheets
Able to conduct electricity
What does lustrous mean?
Shiny
Able to be rolled into thin sheets
Able to conduct electricity
Which of these is a physical property?
Highly reactive
High boiling point
Likely to form ionic bonds
Which of these will rust?
Magnesium
Steel
Sodium
A.Corrosion is the destruction of materials by chemical ___________ with substances in the ____________.
elements, air
reactions, air
reactions, environment
elements, environment
A.Rusting is the corrosion of
zinc
Copper
Iron
aluminium
iron + water + _________ → ____________________
oxygen, hydrated iron (III) oxide
oxygen, hydrated iron (II) oxide
chlorine, hydrated iron (III) oxide
chlorine, hydrated iron (II) oxide
A chemical reaction always results in the production of a new __________.
compound
element
substance
material
What increases the speed of corrosion?
Saltwater
Concrete
Air
Why are the bottom of boats painted?
The paint acts as a barrier against corrosion
The paint acts as a barrier against erosion
The paint acts as a lubricant
What is galvanisation?
Painting a metal so it isn’t corroded
Covering a metal in magnesium to slow corrosion
Covering a metal in zinc to slow corrosion
Which of these statements is correct?
Alkali metals tend to be more dense and soft than transition metals
Alkali metals tend to be more dense and less soft than transition metals
Alkali metals tend to be less dense and more soft than transition metals
Predict which of these metals has the highest melting point?
Lithium
Copper
Rubidium
Predict which metal is likely to be least reactive?
Titanium
Magnesium
Potassium