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Lesson 1: Mass

# Understanding mass (grams and kilograms)

Sal talks about what mass means. He also examines the masses of real objects in grams and kilograms.

## Want to join the conversation?

• how much does a grown elephant weigh in kilo's
• African elephants are the largest of all land animals, adult males weighing between 1,800 and 6,300 kg (2 and 7 tons/ 4,000 and 14,000 lb.). Females are smaller, weighing between 2,700 and 3,600 kg (3 and 4 tons/ 6,000 and 8,000 lb.).
• so basically you can convert grams to kilograms by the thousands?
• To convert grams to kilograms, divide by 1,000. For example, 30,000 grams is 30 kilograms.
• How many grams in a kilogram 👨🏻‍💻
• 1000. The prefix "kilo" stands for one thousand.
• what is the main difference between mass and weight
• Interesting question! Mass is a property of an object that does not depend on the acceleration due to gravity. Weight does depend on acceleration due to gravity. So if an object is moved from one planet to another planet, then the object's mass would not change but its weight could change.

Have a blessed, wonderful day!
• so kilo stands for thousand.
• yes, kilometers is 1,000 meters, kilograms is 1,000 grams
• so does a rat and a field mouse weight the same
• That would probably depend upon the rules you set. If they are both full grown - probably not, but if you weigh a baby rat and a full grown field mouse (sometimes called a vole), they might weigh the same.
• If I were to weigh 750,000, would I be heavy?
• Grams, kilograms, or pounds?