TWO questions!! (Science/astrology related) 1) What are some disadvantages of using a space telescope?

2) Suppose astronomers are interested in obtaining an image of a large area in the sky. Which radiation should astronomers observe if they want to get images 24 hours a day, quickly and cheaply? Why?

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

honestly, i believe it's a.true.

do i get brainliest? ?

am i right? ?

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).