Activity 17 – Washingwell KS2 Trail Post date 10/07/2023 Activity 17 – Washingwell KS2 Trail Trees have been on earth for how many years? 3.7 million 37 million 370 million If you are human, leave this field blank. Submit ← Activity 16 – Washingwell KS2 Trail → Activity 18 – Washingwell KS2 Trail