Home › Activity Library › Activities about HSN/Q.A.1 Topic Activities about HSN/Q.A.1 Search 1 activity Topic: HSN/Q.A.1 × Browse full library → Alarming ice cracks on Brunt Ice Sheet in Antarctica A new, fast-growing ice crack is forcing the Halley VI British research station in Antarctica (shown above) to be moved. Fear of a huge break-off from the ice... Algebra Number Sense Grades 6–HS