3.6.4

Energy

Test yourself

Calories

What people call a calorie is technically a kilocalorie. So '1,000 calories' refers to 1,000 kcals.

Illustrative background for Calories and joulesIllustrative background for Calories and joules ?? "content

Calories and joules

  • One kilocalorie is equal to 4.2 kJ or 4,200 J of energy.
Illustrative background for Average male and female intakeIllustrative background for Average male and female intake ?? "content

Average male and female intake

  • The average woman needs 2,000 kcal (8,400 kJ) per day.
  • The average man needs 2,500 kcal (10,500 kJ) per day.

Jump to other topics

1Principles of Science I

1.1Structure & Bonding

1.2Properties of Substances

1.3Cell Structure & Function

1.4Cell Specialisation

1.5Tissue Structure & Function

1.6Working with Waves

1.7Waves in Communication

2Practical Scientific Procedures and Techniques

3Science Investigation Skills

4Principles of Science II

4.1Extracting Elements

4.2Relating Properties to use of Substances

4.3Organic Chemistry

4.4Energy Changes in Industry

4.5The Circulatory System

4.6Ventilation & Gas Exchange

4.7Urinary System

4.8Cell Transport

4.9Thermal Physics

4.10Materials

4.11Fluids

5Contemporary Issues in Science

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