COMBUSTION

COMBUSTION

8th Grade

20 Qs

quiz-placeholder

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COMBUSTION

COMBUSTION

Assessment

Quiz

Physics

8th Grade

Practice Problem

Medium

Created by

MUHAMMAD SALIM

Used 2+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does a matchstick not catch fire on its own at room temperature?

It does not have enough oxygen

temperature is below the ignition temperature

It lacks fuel

It is a non-combustible material

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following factors will extinguish a fire?

Adding more oxygen

Increasing the temperature of the fuel above its ignition temperature

Removing oxygen from the fire's surroundings

Increasing the amount of fuel

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What makes kerosene oil more flammable than wood?

Kerosene has a higher vapor pressure than wood

Kerosene is a gas, while wood is a solid

Kerosene requires less heat to ignite

Wood can only ignite in dry conditions

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary mechanism by which carbon dioxide extinguishes flames?

It cools the fire by absorbing heat

It displaces oxygen in the air surrounding the fire

It chemically alters the fuel to prevent combustion

It increases the concentration of flammable gases

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A piece of paper burns easily, but paper wrapped around an iron rod does not. Why?

The paper in contact with the iron rod does not reach its ignition temperature

The iron rod absorbs oxygen from the paper

The iron rod prevents the paper from producing flames

The paper becomes non-combustible when near the iron rod

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of a flame is typically the coolest?

The dark zone

The luminous zone

The non-luminous zone

The outermost zone

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are safety matches safer than earlier versions of matches?

They use white phosphorus, which ignites easily

They contain powdered glass, which acts as a fuel

They do not require friction to ignite

They only ignite when struck on a specific surface

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