A dry-cell battery produces . Question 7 options:

an alternating current

a direct current

the same current that a generator produces

both direct and alternating current

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

All are great precautions but you can still lift lighter and different muscles in between hard workdays. this keeps other muscles not usually used in shape.

Phagocytes contain digestive enzymes to facilitate the process of phagocytosis

Answer;

hot magma rises and pushes up toward the lithosphere, and as it cools it cycles back down toward the core to be heated again.

explanation; convection currents are the circular pathways taken by a fluid that enhances heat transfer by the process known as convection which occurs in fluids.convection currents transfer heat from one place to another by mass motion of a fluid. earth mantle is in a semi-liquid state and behaves like any other fluid, rising up from the bottom of the mantle after becoming hotter and less dense from heat of the earth's core, as the rock loses heat into the earth's crust it becomes cooler and more dense, then sinking back down to the core, then repeating the cycle.