Question

occurs when heat is transferred through molecular or motion
creates a current through the up and down movement of molecules as they heat and cool
occurs in liquids and
movement occurs since heat causes molecules to become less and rise
as molecules cool, they become denser and fall
cannot occur without first occurring
can be seen in convection ovens, which use fans to heat evenly

Explanation:

Step1: Analyze each blank

• For the first blank: Convection occurs due to molecular or particle motion.
• For the second blank: Convection occurs in liquids and gases.
• For the third blank: Heat makes molecules less dense.
• For the fourth blank: Convection needs conduction first (as heat is initially transferred by conduction to start the motion).
• For the fifth blank: Fans in convection ovens disperse heat.

Answer:

1. particle
2. gases
3. dense
4. conduction
5. disperse