At what age are people most physically active? Age The age group 18 to 44 was the most likely to exercise. Of those individuals age 18 to 44, 59.7 percent reported exercising at least three times a week for half an hour or more. This compares with 53.5 percent and 46.7 percent, respectively, for the […]
Why do plant cells have cell walls and animal cells do not?
Why do plant cells have cell walls and animal cells do not? Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but […]
What element is a good insulator?
What element is a good insulator? Examples of good conductors are sliver, tin, and lead. Good insulators contain 8 electrons which mean they are stable(noble gasses group 18). Insulators can’t be easily transported from one atom to another and nonmetals make good insulators. Three examples of good insulators are sulfur, silicon, and rubber. What makes […]
What are the features of a sedimentary rock?
What are the features of a sedimentary rock? Sedimentary rocks contain rounded grains in layers. The oldest layers are at the bottom and the youngest layers are at the top. Sedimentary rocks may contain fossils of animals and plants trapped in the sediments as the rock was formed. What type of minerals are found in […]
Does hair color come from Mom or Dad?
Is thermal energy the total kinetic energy of an object?
Is thermal energy the total kinetic energy of an object? Thermal energy is the total internal kinetic energy of an object due to the random motion of its atoms and molecules. It is sometimes confused with internal energy or thermodynamic energy. They consist of the sum of the internal kinetic energy (thermal energy) and the […]
What is the power of an appliance?
What is the power of an appliance? The power of an electrical appliance tells us how much electrical energy it transfers in a second. Power, P is measured in watts (W) where: 1 W = 1 J/s (joule/second). Appliances used for heating have a much higher rating than those used to produce light or sound. […]
Why does a straw look bigger in water?
What is the most important element of history?
What is the most important element of history? Plot: The most important element. The sequence of events in a story. What are the 7 elements of history? Tips on Setting in Historical Fiction The most popular post on A Writer of History is about the 7 Elements of Historical Fiction: characters, dialogue, plot, conflict, theme, […]