How does a covalent bond differ from an ionic bond? a. a covalent bond is formed when two atoms share one or more protons. an ionic bond is formed when one atom gives up one or more protons to another atom. b. a covalent bond is formed when one atom gives up one or more electrons to another atom. an ionic bond is formed when two atoms share one or more electrons. c. a covalent bond is formed when two atoms share one or more electrons. an ionic bond is formed when one atom gives up one or more electrons to another atom. d. a covalent bond is formed when one atom gives up one or more protons to another atom. an ionic bond is formed when two atoms share one or more protons.

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Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j