An Inherent Force Pulls Molecules Together
An Inherent Force Pulls Molecules Together is a Grade 7 science concept from Amplify Science (California) Chapter 3: Investigating Attraction and Phase Change, introducing molecular attraction as the constant force that holds molecules together in solids and liquids. This inherent pull does not change in strength when energy is added or removed — it is a fixed property of each substance.
Key Concepts
The molecules that make up any substance are always pulling toward one another. This natural pull is an inherent force called molecular attraction . This attraction is what holds the molecules of a substance together, especially in the solid and liquid states.
The strength of this attraction is a constant property for a specific substance. It does not get stronger or weaker when energy is added or removed. The pull between the molecules is always there, acting like a constant "glue".
Common Questions
What is molecular attraction?
Molecular attraction is an inherent force that pulls molecules of the same substance toward each other. It acts like a constant magnetic pull, holding molecules together in solids and liquids.
Does molecular attraction change when you heat a substance?
No. The strength of molecular attraction is a constant property of a substance. Adding or removing energy does not make the attraction stronger or weaker — only the speed of molecules changes.
Why do substances stay together as solids or liquids?
Because molecular attraction holds molecules together. In solids and liquids, molecules do not have enough kinetic energy to completely overcome this pull, so they remain in close contact.
What do Grade 7 students learn about molecular attraction in Amplify Science?
In Chapter 3 of Amplify Science California Grade 7, students learn that molecular attraction is an inherent, constant force that holds molecules together, and they explore how energy interacts with this attraction during phase changes.