Answer:
hydrogen, oxygen, carbon and nitrogen
I did 4 instead :')
Explanation:
8.3 × 10-6 meters=77 meters
Answer, =8.3=77 meters
Answer:
in science Observation is essential in science. Scientists use observation to
collect and record data, which enables them to construct and
then test hypotheses and theories . Scientists observe in many
ways – with their own senses or with tools such as microscopes,
scanners or transmitters to extend their vision or hearing
