Zero conditional for scientific and general facts that are always true
Q1. If you heat water to 100°C, it ___
Zero conditional states scientific fact. Water boils at 100°C. Always. Physics is consistent.
Q2. When ice ___, it turns into water
Present simple in both clauses. Ice melts. Water results. The water cycle continues.
Q3. If you mix blue and yellow, you ___ green
Zero conditional for colour mixing. Blue plus yellow equals green. Art class basics.
Q4. Plants die if they ___ not get enough sunlight
Present simple for general truth. Plants need sunlight. Photosynthesis is non-negotiable.
Q5. If you drop something, it ___ to the ground
Gravity is reliable. Objects fall. Newton explained it. Zero conditional describes inevitability.