1.0International School Crnjanski - Jagodina, Serbiahttps://crnjanski.rs/enMomahttps://crnjanski.rs/en/author/moma/rich600338<blockquote class="wp-embedded-content" data-secret="NN2L9S7Mtc"><a href="https://crnjanski.rs/en/2023/11/17/rock-tumbler/">Rock Tumbler</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://crnjanski.rs/en/2023/11/17/rock-tumbler/embed/#?secret=NN2L9S7Mtc" width="600" height="338" title="“Rock Tumbler” — International School Crnjanski - Jagodina, Serbia" data-secret="NN2L9S7Mtc" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://crnjanski.rs/en/wp-includes/js/wp-embed.min.js </script> https://crnjanski.rs/en/wp-content/uploads/sites/2/2023/11/viber_image_2023-11-17_14-26-27-548.jpg18001199Today as part of our Science class the students learned about the physical properties of rocks and the process of rock polishing, which happens naturally over very long periods of time as rocks are rolled by the waves and rubbed against sand and each other. But thanks to the Rock Tumbler we have used for […]