Two of the main dangers for the icebreaker ship Polarstern during their year-long stay in the frozen Arctic ocean are 1) the ship being crushed by the frozen ice and 2) polar bears. True False

True.

Explanation: Two icebreaker ship polarstern from Germany and the Akademik fedoeov from Russia sailed on a mission towards central Arctic. Their tasks were to find an ice floe so strong and thick it would ultimately freeze the polarstern, entrapping the ship for a whole year within the ice.

There is the danger of been attack by polar bears, because polar bears lives in the Arctic. And there is also the risk of the ship been crushed by frozen ice.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."