# Kilogram

## Key Stage 3

### Meaning

The kilogram (kg) is the scientific unit for measuring mass.

Kilograms are shortened to kg with a lower case k and a lower case g.
Kilo refers to one thousand as there are 1000 grams in a kilogram.
The average mass of an adult human is around 70 kilograms.
The mass of an apple is 0.1 kilograms.

### Converting to Kilograms

 Unit To convert Kilograms 1 megagram (1Mg) Convert to kilograms x1000. 1000kg 1 kilogram (1kg) Convert to kilograms x1. 1kg 1 gram (1g) Convert to kilograms /1000. 0.001kg 1 milligram 1(mg) Convert to kilograms /1000,000. 0.000001kg 1 microgram 1(µg) Convert to kilograms /1000,000,000. 0.000000001kg

## Key Stage 4

### Meaning

The kilogram (kg) is the SI Unit of mass.

Kilograms are shortened to kg with a lower case k and a lower case g.
Kilo refers to one thousand as there are 1000 grams in a kilogram.
The average mass of an adult human is around 70 kilograms.
The mass of an apple is 0.1 kilograms.

### Converting to Kilograms

 Unit To convert Kilograms 1 megagram (1Mg) Convert to kilograms x103 1x103kg 1 kilogram (1kg) Convert to kilograms x1 1kg 1 gram (1g) Convert to kilograms x10-3 1x10-3kg 1 milligram 1(mg) Convert to kilograms x10-6 1x10-6kg 1 microgram 1(µg) Convert to kilograms x10-9 1x10-9kg

### References

#### AQA

Kidneys, pages 155-8, GCSE Biology, Hodder, AQA
Kidneys, pages 186-191, GCSE Biology; Third Edition, Oxford University Press, AQA
Kidneys, pages 215, 219-221, GCSE Biology, CGP, AQA
Kidneys, pages 75, 76, GCSE Biology; The Revision Guide, CGP, AQA
Kidneys; kidney failure, pages 219, 220, GCSE Biology, CGP, AQA
Kidneys; kidney transplants, pages 220, 221, GCSE Biology, CGP, AQA

### References

#### AQA

Kilogram, pages 152-3, GCSE Physics; Student Book, Collins, AQA