If an object (fall) into a black hole, it (get) stretched and compressed.
If an object falls into a black hole, it gets stretched and compressed.
If lightning (hit) sand, it (create) glass.
If lightning hits sand, it creates glass.
If you (cut) a worm in half, it (not) always (become) two worms.
If you cut a worm in half, it doesn’t always become two worms.
If you (pour) water on dry ice, it (start) to bubble and release carbon dioxide gas.
If you pour water on dry ice, it starts to bubble and release carbon dioxide gas.
If the temperature (drop) below -40°C, Celsius and Fahrenheit scales (show) the same number.
If the temperature drops below -40°C, Celsius and Fahrenheit scales show the same number.
If a shark (stop) swimming, it (can) suffocate.
If a shark stops swimming, it can suffocate.
If you (freeze) mercury, it (become) solid.
If you freeze mercury, it becomes solid.
If you (touch) the skin of a dart frog, you (get) poisoned.
If you touch the skin of a dart frog, you get poisoned.
If water (reach) 100°C at sea level, it (boil).
If water reaches 100°C at sea level, it boils.
If you (mix) any blue and yellow, you (get) green.
If you mix any blue and yellow, you get green.
If you (eat) too much vitamin A, you (can) turn orange.
If you eat too much vitamin A, you can turn orange.
If you (look) directly at a solar eclipse without special glasses, you (damage) your eyes.
If you look directly at a solar eclipse without special glasses, you damage your eyes.
If you (play) music to plants, they (grow) no faster than usual.
If you play music to plants, they grow no faster than usual.
If bees (disappear), many plants (stop) reproducing.
If bees disappear, many plants stop reproducing.