Particle Model and States of Matter
What are the three states of matter?
物质的三种状态是什么？
Solid, liquid, gas / 固体、液体、气体
What is the formula for density?
密度的公式是什么？
Density = mass/volume / 密度 = 质量/体积
What are fluids?
什么是流体？
Liquids and gases / 液体和气体
What is the density of water?
水的密度是多少？
1 g/cm³ / 1克/立方厘米
What is another name for drag?
阻力的另一个名称是什么？
Air resistance or water resistance or Friction/ 空气阻力或水阻力
In which state of matter are particles held in fixed positions?
在哪种物质状态下，粒子被固定在位置上？
Solid / 固体
What happens to the density of a substance when it is heated?
当物质被加热时，它的密度会发生什么变化？
It decreases / 它会减小
How does pressure in fluids act?
流体中的压力是如何作用的？
In all directions / 向各个方向
Will an object float if its density is less than water?
如果物体的密度小于水，它会浮起来吗？
Yes / 会
How can drag be reduced on an object?
如何减少物体上的阻力？
By making it streamlined / 通过使其流线型化
Which state of matter has particles that are far apart and move freely?
哪种物质状态的粒子相距较远且自由移动？
Gas / 气体
Why does ice float on water?
为什么冰会浮在水上？
Ice is less dense than water / 冰的密度比水小
What happens to gas pressure if you heat the gas?
如果加热气体，气体压力会发生什么变化？
It increases / 它会增加
What happens to the density of water when it freezes?
当水结冰时，它的密度会发生什么变化？
It decreases / 它会减小
What happens to drag as speed increases?
当速度增加时，阻力会发生什么变化？
It increases / 它会增加
What happens to the movement of particles when a solid is heated?
当固体被加热时，粒子的运动会发生什么变化？
They vibrate more / 它们振动得更剧烈
What is the term for the temperature at which a liquid turns into a gas?
液体变成气体的温度叫什么？
Boiling point / 沸点
Why does pressure increase as you go deeper into the sea?
为什么越深入海底，压力越大？
There is more water above pressing down / 上方有更多的水压下来
Why does a metal ship float even though metal is dense?
为什么金属船即使金属密度大也能浮起来？
The ship has air inside, reducing its overall density / 船内部有空气，降低了整体密度
Why do cars use more fuel at high speeds?
为什么汽车在高速行驶时会消耗更多燃料？
Drag increases, requiring more energy / 阻力增加，需要更多能量
Why can gases expand to fill their container?
为什么气体可以膨胀以充满容器？
Particles are far apart and move freely / 粒子相距较远且自由移动
Why does the temperature remain constant during melting?
为什么在熔化过程中温度保持不变？
Energy is used to break bonds between particles / 能量用于打破粒子之间的键
How can you increase the pressure of a gas in a container? (Name two ways.)
如何增加容器中气体的压力？（说出两种方法。）
Add more particles or reduce the volume or increase the temperature / 增加粒子或减小体积
What is the principle that explains why objects float or sink?
解释物体浮沉的原理是什么？
Bouyancy and density of the object less that 1 g/cm^3
What causes drag in fluids?
流体中的阻力是由什么引起的？
Particles hitting the object and the force needed to move the fluid / 粒子撞击物体和移动流体所需的力