Add compost to your garden. Because carbon is the primary energy source for microorganisms, they need lots of organic matter to thrive. … Plant in cover crops. … Keep your soil well watered. … Avoid physical disturbances. … Mulch your beds. … Avoid pesticides. 1 What are beneficial soil organisms? 2 Which can
Read moreThis included polished flint axes, harvesting tools and more developed pottery making. The first farmers had effective tools to fell the forest’s trees and construct houses and fences. The new polished flint axes had a “point-butted” shape. 1 When was the first farming tool made? 2 How tools were made by the first
Read moreThe Framers of the Constitution hoped the smaller Senate would be a more responsible body than the House. They reinforced that hope by giving senators a longer term than the representatives. A representative’s term is only two years. The six-year term of a senator is three times as long. 1 How did the
Read moreFill the container with the water. Pop off the back of the highlighter and pull out the ink soaked felt that is inside. Put the highlighter felt under the water and squeeze it until the water is stained with the highlighter ink. Turn off the lights, place a flashlight under the jar, and watch the
Read moreCrops began to fail with the onset of drought in 1931, exposing the bare, over-plowed farmland. Without deep-rooted prairie grasses to hold the soil in place, it began to blow away. Eroding soil led to massive dust storms and economic devastationespecially in the Southern Plains. 1 How did the Dust Bowl make the
Read moreAncient Mesopotamians were first to produce a kind of soap by cooking fatty acids – like the fat rendered from a slaughtered cow, sheep or goat – together with water and an alkaline like lye, a caustic substance derived from wood ashes. The result was a greasy and smelly goop that lifted away dirt. Contents
Read moreWhen the pipes had to span a valley, they built a siphon underground: a vast dip in the land that caused the water to drop so quickly it had enough momentum to make it uphill. 1 How did a Roman aqueduct work? 2 How did Romans raise water? 3 Did the Romans create
Read moreOriginally, bows were made of any springy material, including bamboo as well as various types of wood, and the bowstrings were made of animal gut. 1 Did the Cherokee use bow and arrows? 2 How did natives make bow string? 3 What Native American tribe made the best bows? 4 What kind of
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