You would weigh it using a mass balance.
A pencil, a piece of paper, and a scientific calculator all have a mass less than one kilogram.
you weigh it
An average pencil won't even register on my postal scale, so I would estimate its weight at less than 5 grams. -Less than 0.005 Kg.
What are three things less than a kilogram?
An less permanent alternative.
Three objects greater than one kilogram are a pencil, a sheet of paper, and a paperclip.
Please note that a kilogram is a unit of mass - NOT a unit of weight. And yes, a pencil has a mass that is considerably less than a kilogram. For comparison, a kilogram is the mass of a liter of water.
Unless any of them are abnormally large, it should be common sense. But you could find a scale and weigh them.
A pencil, a piece of paper, and a scientific calculator all have a mass less than one kilogram.
An egg weighs less than 1 kilogram - or an apple.
no, it is much less, closer to 0.005 kg, or 5 grams
A pencil, a flea and an atom.
I would improve a pencil by using less wood and lead.
A pencil, a sheet of paper, and a paper clip.
you weigh it
less
A gram weighs less than a kilogram.