How can the Earth be a closed system if space shuttles can leave the atmosphere? Hint: What leaves or doesn't leave the atmosphere? Question 4 options: Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere. When the Earth has received enough radiation from the sun, it creates an opening in the closed system that lets matter out. The Earth is a partially closed system.

Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere

Explanation:

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

can you attach the