What is the primary cause of fire according to the introduction?

Understanding Fire and Flames

Interactive Video
•
Physics, Chemistry, Science
•
7th - 12th Grade
•
Hard

Sophia Harris
FREE Resource
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7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combustion of organic material and air
Chemical reactions in water
Electric sparks
Friction between two surfaces
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why do gas flames appear blue?
Due to the presence of soot
Due to the presence of oxygen
Because of atomic transitions in clean burning
Because of impurities in the fuel
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main reason wood-fire appears orange?
High oxygen levels
Low temperature
Incomplete combustion and glowing soot particles
Presence of water vapor
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the reason we don't see humans glowing visibly?
Humans reflect all light
Humans absorb all light
Humans emit ultraviolet light
Humans are too cool to glow with visible light
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What process causes hot objects to glow?
Nuclear fusion
Chemical reaction
Blackbody radiation
Thermal expansion
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What shapes the familiar form of flames on Earth?
Wind
Magnetic fields
Electrical currents
Gravity and convection
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a flame behave in zero gravity?
It extinguishes immediately
It forms a spiral
It spreads outwards like a balloon
It forms a straight line
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