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Lesson 2: Volume

Measurement: FAQ

What is mass?

Mass is the amount of matter in an object. We usually measure it in grams $\text{(g)}$ or kilograms $\text{(kg)}$.

What is volume?

Volume is the amount of space an object takes up. We can measure it in units like milliliters $\text{(mL)}$ or liters $\text{(L)}$.

What is the difference between milliliters and liters?

Milliliters are smaller than liters. There are $1,000$ milliliters in $1$ liter.
A single raindrop contains about $1$ milliliter of liquid:
This bottle contains about $1$ liter of liquid:

What is the difference between grams and kilograms?

Grams are smaller than kilograms. There are $1,000$ grams in $1$ kilogram.
A small paperclip has a mass of about $1$ gram:
A wooden baseball bat has a mass of about $1$ kilogram:

What's the difference between mass and weight?

Mass is the amount of matter in an object, while weight is the force an object exerts on a scale due to gravity. While mass stays the same no matter where we are, weight can change depending on the strength of gravity. For example, we would weigh less on the moon because the moon's gravity is weaker than Earth's.

Want to join the conversation?

• what is the fomula for mearsuring mass ?
• volume x density
• why can weight change depending on gravity?
• That is, the weight of an object is determined by the pull of gravity on it. Thus, an object's physical weight may change from place to place: if a body weighs 54 kg on Earth, its weight will be just over 9 kg on the Moon, since the Earth's gravitational force is six times stronger than the Moon's.
• How much weight is on Earth?
• 5.972 × 10^24 kg
• how can you convert milliliters to liters?
• 1 liter = 1000 milliliters
1 milliliter = 0.001 (1/1000) liters
• hello i know this isn't a question but i wanted to say hi and say that you are really cool and have a good dy
• i got a question if every bottle carrys 1 millimeter what happens if I increase the size of bottle with it still stay at 1 millimeter?