Substinence farming is farming food that is just enough to live off of. You don't sell substinence crops.
Commercial farming is growing food to sustain you, and having enough left over to sell.
In both, you grow food and you keep some (or all) for yourself.
Acid - an acid is a chemical species that donates protons for hydrogen ions and or excepts electrons. Most as it’s contain hydrogen atom bonded that can release (dissociate) to yield the cation and anion and water.
Answer:
its the crust and a little bit of the upper mantle
Explanation:
Answer and explanation:
a) The plate tectonics is a theory that suggests that Earth's outer shell is divided into several plates that glide over the mantle (rocky inner layer above the core), there are seven major plates that make up 94% of the Earth's surface and many smaller plates making up the other 6% (I annexed a map of those tectonic plates). The tectonic plates are in motion (presumably since the beginning of time), the movement of the plates creates three types of tectonic boundaries:<em> convergent </em>(plates move into one another); <em>divergent </em>(plates move apart); and <em>transform</em> (plates move sideways in relation to each other).
b)The Mid-Atlantic Ridge (MAR) is a divergent tectonic plate or constructive plate boundary located along the floor of the Atlantic Ocean. <em>The MAR developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates</em>
c) In areas where the plates come together, sometimes volcanoes will form, they can also form in the middle of a plate, in places called "hot spots" where magma rises upward until it erupts on the seafloor. The Hawaiian Islands<em> were formed by such a hot spot occurring in the middle of the Pacific Plate.</em>
I hope you find this information useful and interesting! Good luck!
There were bones from dinosaurs, the exact same on two different continents, giving him a theory of the continental drift. Plus if you look at a map, you will notice that some continents fit ether like a puzzle, for example, Africa and South America.
