“Why do things float?” he asked the class. No one said a word. The whole class was 1 . “Anyone?” Mr. Allen smiled at his students. “Let’s brainstorm some answers.” He swirled (旋动) the glass gently. The ice cubes bobbed up and down in the water, then floated back ...
根据上文 “No one said a word."可知,全班都 很沉默,故选D。 2.句意:冰块在水中上下晃动,然后又浮回水面。 left左边的;right右边的;top顶部的;bottom底部的。根据上文“Why do things float?"及“then floated back..”可知,是指冰块最终还是会浮到顶部,故选C。 3.句意:学生们保持安静。 turned转变...
Hollow things often float too as air is less dense than water. This is partly why huge heavy ships float. Another thing to consider is the shape of an object. Generally the more of the outside of an object that is touching the water the more buoyant it is. Water pushes back up agains...
Why do things float in water is really a great question. In order to understand the concept, you will need to review the lesson about density, Archimedes' principle and buoyancy.Whether an object floats or sinks or does neither will depend on its weight or the force that pushes the object...
Why do things float? A study of the place for alternative models in school science.Selley, Nicholas
(二)Why do balloons float in the air?Balloons have air in them. 1 is a gas. A gas is a kind of matter(物 ).liquid solid It has mass(质量) and takes up space. You can't 2 air. But you can feel it gas when it moves. A gas has no shape. It takes the shape of the ...
Due to salt's density, items float higher in the water. You can do this experiment with things you'll find around the house, and it's fun too. You'll keep bobbing along if you explore buoyancy! It's the perfect day for a daydream....
We’ve talked abouthealthy bathroom habitsandways to resolve constipation, and today we will discuss the buoyancy of poop in particular. Whether your poops bob at the surface or dive to the bottom can be a sign of many things to do with your health and nutritional status. ...
Takeaway It can be common to experience the feeling of "butterflies in your stomach" from time to time. The fluttery sensation we may get in our gut can be positive and negative, depending on the situation. However, it often indicates that our nervous system is activated. ...
On this episode of Shopify Masters, you'll learn why the founder of Zootility Tools had to completely rethink his Kickstarter product for retailers.