States of Matter: solids, liquids and gases.
Solids are compact and move less. Strong attractive forces between molecules.
Liquids are less compact and move more. Fairly strong attractive forces between molecules.
Gases are much less compact and have a lot more energy. Weak attractive forces between molecules.
However, if you have 1 g of salt (NaCl) and 1 g of oxygen gas (O2) at room temperature both have the same amount of average kinetic energy for the two substances are the same. Temperature by definition is the average kinetic energy.
The way to make their statement correct is to say: "liquids have less attractive forces between their molecules than solids."
Their research on the universe is great. Kudos for some good research.
Thank you all for reading.
Read, Learn and Love.