--- title: "Year 3 rocks" url: "https://stedmundscatholicprimaryschool.schudio.com/blog/2016-10-04-12-08-02-year-3-rocks" school: "St Edmund's Catholic Primary School" --- [![St Edmund's Catholic Primary School](https://files.schudio.com/stedmundscatholicprimaryschool/images/logo/st-edmund-catholic-logo-2.png)![](https://files.schudio.com/stedmundscatholicprimaryschool/images/logo/st-edmund-catholic-logo-2.png)](https://stedmundscatholicprimaryschool.schudio.com/) - [ School Life](https://stedmundscatholicprimaryschool.schudio.com/school-life/welcome) - [Welcome to St Edmund's](https://stedmundscatholicprimaryschool.schudio.com/school-life/welcome) - [St Edmund's Governing Body](https://stedmundscatholicprimaryschool.schudio.com/school-life/governing-body) - [St Edmund's Staff](https://stedmundscatholicprimaryschool.schudio.com/school-life/staff) - [Class Pages](https://stedmundscatholicprimaryschool.schudio.com/year-groups) - [EYFS](https://stedmundscatholicprimaryschool.schudio.com/year-groups/eyfs) - 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We dropped rocks in a jug full of water and thought about whether they would sink or float. We learned that rocks from volcanoes float in water. Their holes are filled with air. That is why volcano rocks float. Some rocks sink. 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