Weegy: Please ask one question at a time.
User: The first law of thermodynamics states that energy can't be created or destroyed. If people can't create energy, where do we get energy to do work?
the Sun and moon
food and fossil fuels
our heart and mind
Earth's orbital momentum
(More) 3
The major difference between Earth and the other planets in our solar system is that Earth has a biosphere.
Added 4/5/2021 2:17:07 PM
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3
The following tests can help identify a mineral: Scratch it against a streak plate to see the color of its residue; Hold light to it and examine its luster; Hit it with a hammer and see how it breaks; Examine its texture and see if it's rough, smooth, or glassy.
Added 4/5/2021 2:17:34 PM
This answer has been confirmed as correct and helpful.
3
Convection is a process of heat transfer. In the earth, convection occurs because of heat and pressure from the core.Animation that best describes convection is: A
Added 4/5/2021 2:18:43 PM
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3
The Sun has the greatest gravitational pull, because it's the largest body in the solar system.
Added 4/5/2021 2:19:09 PM
This answer has been confirmed as correct and helpful.
3
Photosynthetic bacteria was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere, as we have today.
Added 4/5/2021 2:20:15 PM
This answer has been confirmed as correct and helpful.