Question

what does atmosphere mean in this story?
a gases that surround a planet
b the liquid surface of a planet
c the gravity of a planet
what would probably happen if earth was much farther from the sun than it is now?
a the northern lights would be less bright.
b earth could not sustain
c earths atmosphere would float away.
why is the presence of water important to the presence of life on a planet?
water is important to the presence of life on our planet because its our only resource mostly to survive and live. we need water to do the daily average things.

Explanation:

1. The atmosphere is defined as the gases that surround a planet. Gravity is what holds the atmosphere in place, not what the atmosphere is. The liquid surface of a planet is not the atmosphere.
2. If Earth was much farther from the Sun, the solar - wind and charged particles that cause the Northern Lights would be less intense reaching Earth, making the Northern Lights less bright. Earth's atmosphere is held by gravity and being farther from the Sun wouldn't cause it to float away easily, and Earth could still sustain some forms of life in certain regions even if farther from the Sun.
3. Water is important for life as it is a universal solvent, participates in many biochemical reactions, helps in temperature regulation, and is crucial for the transport of nutrients and waste in living organisms. The provided answer about it being the only resource to survive is an oversimplification.

Answer:

1. a. gases that surround a planet
2. a. The Northern Lights would be less bright.
3. Water is a universal solvent, participates in biochemical reactions, helps with temperature regulation, and is crucial for nutrient - waste transport in living organisms.