Question

describe how to make the following models with the help of objects are found around you
number 1 sand clock model number 2 stethoscope model ​

Answer 1

Answer:

sand model

Explanation:

take two small bottles put holes in their caps and put straw connecting both cap holes and put sand in one of them, put glue or good adhisive on bottle cap stick them together. now match the timing how much time sand take to travel