Last Name * Zeinab Class Period * 3rd Hour When modeling Earth's interior, which layer is primarily responsible for * 2 points convection currents? a. Crust b. Mantle c. Outer core O d. Inner core In a closed system combining two substances of different temperatures, * 2 points what eventually happens? a. The colder substance loses all its energy b. The hotter substance maintains its temperature O C. A uniform energy distribution is achieved O d. The temperature difference increases acer C $ % 8. 2