What is the brownish flaky substance that forms on iron when it rusts?

Understanding Corrosion and Its Prevention

Interactive Video
•
Science, Chemistry, Biology
•
6th - 9th Grade
•
Hard

Mia Campbell
FREE Resource
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8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rust
Copper oxide
Silver tarnish
Aluminum foil
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the rusting activity, what is the purpose of adding oil to test tube B?
To react with calcium chloride
To increase the moisture content
To prevent air from dissolving in water
To dissolve the iron nails
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which test tube in the activity shows rusting of iron nails?
None of the test tubes
Test tube A
Test tube B
Test tube C
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What conditions are necessary for iron to rust?
Both air and water
Neither air nor water
Only water
Only air
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a method to prevent rusting?
Painting
Oiling
Exposing to moist air
Galvanizing
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is galvanization?
Coating with a thin layer of zinc
Heating to high temperatures
Dipping in oil
Mixing with mercury
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an alloy?
A pure metal
A mixture of metals or a metal and a non-metal
A type of rust
A chemical compound
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the electrical conductivity of a metal when it is alloyed?
It becomes zero
It decreases
It remains the same
It increases
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