Curriculum
Course: Alhussan Chemistry — Stage 7
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Curriculum

Alhussan Chemistry — Stage 7

Chapter 1: The Particle Model and States of Matter

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Chapter 2: Elements, Compounds and Mixtures

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Chapter 3: Metals and Non-Metals

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Chapter 4: Chemical Reactions 1

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Chapter 5: Acids and Alkalis

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Chapter 6: The Earth and Plate Tectonics

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Quiz

1.5 Investigating boiling points — Visual & Photo Quiz

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  • Questions count: 3
  • Passing grade: B+
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1.
Look at the photograph showing laboratory thermometers. Why is it essential for Rabia to use precise, calibrated thermometers when measuring boiling points?
Dr Dabour Hub Academy - figure 1
To ensure accurate, repeatable temperature measurements that allow reliable comparison
Because regular thermometers cannot withstand temperatures above 50°C
Because boiling points change depending on the color of the thermometer
To change the atmospheric pressure around the boiling liquid
2.
Look at the table of boiling temperatures of water at various altitudes worldwide. What conclusion can be drawn from this data?
Dr Dabour Hub Academy - figure 2
As altitude above sea level increases, the boiling temperature of water decreases
Water always boils at exactly 100°C regardless of elevation
The boiling temperature of water increases as altitude increases
Altitude has no measurable effect on the boiling temperature
3.
Look at the line graph plotting altitude versus water boiling temperature. What was the anomalous result identified by Rabia?
Dr Dabour Hub Academy - figure 3
The measurement from Riyadh (40°C), which was air temperature mistakenly recorded instead of boiling water
The measurement from Mount Everest (69°C)
The measurement from Chennai (100°C) at sea level
The measurement from Leh (88°C)
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Part of Chapter 1: The Particle Model and States of Matter — see every lesson and quiz in this unit.
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