Curriculum
Course: Science — Second Preparatory
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Curriculum

Science — Second Preparatory

Unit 1: Matter and Energy

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Unit 2: Matter and Chemical Reactions

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Unit 3: Energy Flow in Photosynthesis and Respiration

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Unit 4: Geological Processes

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Quiz

Internal Energy and Temperature — Lesson quiz

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  • Questions count: 2
  • Passing grade: 60%
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1.
Calculate the heat needed to heat 2 kg of water from 20 °C to 45 °C, given c = 4200 J/(kg·°C).
21 kJ
210 kJ
2100 kJ
168 kJ
2.
Which needs more heat to warm up by the same amount, water or iron? Why?
Iron, because its specific heat capacity is larger
Both need the same heat because their masses are equal
Water, because its specific heat capacity is larger
Iron, because its density is lower
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