What happened when Earth's first atmosphere collapsed? Will mark you as brainliest! - it created oxygen

-it formed the oceans

-it triggered an ice age

-it fell as rain, watering the earliest plants

Which properties describe all matter?

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen