How amazing it is! Sand turns to glass when it ___ by the lightning. A. hits B. is hit C. is hitting D. will be hit 相关知识点: 试题来源: 解析 B 【详解】 句意:这是多么神奇啊!沙子被闪电击中后变成玻璃。 考查被动语态。句子主语it指代的是“Sand”,与动词hit之间是被动关系,应用被动...
Some chemistry experiments look more dramatic than others. Turning a glass of apparently pure water into “wine” and back again should certainly impress your audience. It also makes a good visual demonstration of a pH indicator, and happens to be one of the most straightforward experiments to s...
Kerkenes Dag lends itself particularly well to magnetometry because it was all burnt once in a savage fire. In places the heat was sufficient to turn sandstone to glass and to melt granite. The fire was so hot that there were strong magnetic signatures set to the Earth’s magnetic field fr...
1Prepare a makeshift furnace from a charcoal barbecue grill.This method uses the heat generated by a large charcoal fire to melt silica sand into glass. The materials used are relatively cheap and common - theoretically, all you'll need is a short trip to the hardware store to be ready to...
some all-purpose glue, a little sand paper and anything else you might want to personalize your clock, like paint, stencils or decals. If you don't want to hang the clock, you can always buy a small stand for it. Either way you'll have a beautiful conversation piece for you next din...
It would be like trying to build a sandcastle without a bucket or shovel – nearly impossible! These structures are the backbone of any construction project, providing a safe and sturdy platform for workers to perform their tasks. Industrial gratings play a crucial role in creating these ...
At a high level, glass is sand that’s been melted down and chemically transformed. If you’ve ever been to the beach, you know exactly how hot sand can get while remaining in its solid form. The kind of heat necessary to transform sand into a liquid state (eventually becoming glass) ...
Water gives life, and gives you the ability to make your oatmeal & bread concoction meld together easily! Bowl: Place a bag in it you slob! Just something to mix your goop in! Process: Step 1: Add oatmeal into bowl (½ cup or 1 cup) and combine with bread. ...
and--finally--100 mL of vinegar in a fourth beaker. You then need to pour the contents of each beaker sequentially into the next, and observe the colors produced (so, pour the first into the second, the second into the third, and so on). While the vinegar will initially turn the sol...
Once the plaster has set, lift it carefully out of the sand, turn it over, and carefully dust off the extra sand. Place your sandcasts in a protected place overnight to continue the drying process. Admire! We especially love the combination of the seashells, glass beads, and melted crayon...