Answer:
B.
Explanation:
This is physical change as the popcorn has expanded in size.
C.)Cool air near the surface forms high-pressure areas; warm air forms low-pressure areas.
Explanation:
The relationship between air temperature and high and low pressure air is such that cool air near the surface forms high-pressure areas and warm air forms low pressure areas.
- Cool air is closer to the surface because it has low kinetic energy to move. It is denser.
- Warm air rises sharply away from the ground surface.
- They form low pressure areas and their molecules are wide apart due to their high kinetic energy. The air is less dense.
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They all have 2 elections in the outer S orbital, and 4 electrons in the P orbitals.
Hi I'm in Chemistry too this year,
I believe D is correct because usually physical changes are things like density, color or quantity.
The smallest particle of an element that still retains the chemical properties of it is an atom.
