Question

all substances are made up of small particles of matter that are constantly moving. in a gas, these particles can move freely and tend to be far from one another. in fact, the space a gas takes up is mostly empty!
gas particles move quickly and randomly. they travel in straight lines, changing direction whenever they collide with each other or with the walls of their container. even though there is a lot of space between particles in a gas, collisions occur frequently because the particles are moving so fast.
which of the following statements are true about gas particles? select all that apply.
gas particles rarely collide with each other.
gas particles are always moving.
gas particles are tightly packed together.

Explanation:

• The text states "collisions occur frequently because the particles are moving so fast", so the statement "Gas particles rarely collide with each other" is false.
• It is clearly mentioned "All substances are made up of small particles of matter that are constantly moving. In a gas...", so "Gas particles are always moving" is true.
• The text says "In a gas, these particles can move freely and tend to be far from one another", so "Gas particles are tightly packed together" is false.

Answer:

Gas particles are always moving.