Question

Make a model of a sand clock which can measure a time interval of 2 minutes.

Answer 1

• To make a model of a sand clock that can measure a 2-minute time interval, you will need two identical plastic or glass containers, sand, a timer, a drill or sharp object to make holes, tape or glue, and cardboard or plastic discs.
• First, clean and dry the containers. Drill a small hole in the center of each lid. Cut cardboard or plastic discs with a hole in the centre and place them inside the lids, aligning the holes. Secure the discs with glue or tape. Fill one container with sand and use a timer to adjust the amount so it flows through the hole in exactly 2 minutes. Attach the lids to the containers, ensuring a tight seal. Securely tape or glue the two containers together at the lids. Invert the assembly and start the timer to check if the sand flows completely in 2 minutes.
• Adjust the sand amount if necessary. This simple sand clock model will accurately measure a 2-minute interval using the flow of sand.