“how fast do hummingbirds fly? ” why is the question a scientific question? it expresses an opinion. it can be tested during field studies. it can be answered without an investigation. it asks about phenomena that cannot be measured.

~fourth largest plate ~includes parts of the indian and atlantic oceans ~subducts below the eurasian plate on the west side ~ the arabian and somali plates form boundaries with it what is the name of the tectonic plate described above? a) african plate b) eurasian plate c) north american plate d) indo- australian plate

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled