Question

1. which is a \big idea\ of physical science?

most of the mass of the earth consists of solid matter.
energy can be transferred but it can never be destroyed.
the universe is getting smaller.
motion cannot be altered by forces.

Explanation:

• The first option is a statement about Earth's composition, not a fundamental physical science principle.
• The second option is the law of conservation of energy, a key "big idea" in physical science.
• The third option is incorrect as the universe is expanding.
• The fourth option is wrong as forces can alter motion (Newton's laws).

Answer:

Energy can be transferred but it can never be destroyed.