Bodies of water, such as ponds, freeze from top to bottom, forming a floating sheet of ice. This can help aquatic organisms survive during cold winter months.
Which of the following statements explains why the ice floats on the surface of the pond?
Choose 1
The ice molecules have higher kinetic energy than the liquid water molecules, causing them to
float.
As water freezes, ionic bonds form between water molecules, preventing the ice from sinking
below the surface.
The crystalline structure of solid ice makes it less dense than liquid water.
The increased number of hydrogen bonds in ice compared to liquid water causes the water
molecules in ice to be closer together

Schools are being forced to embrace computers. unlike their "digital immigrant" teachers, these students are "digital natives", born into a world where technology is an integral part of everyday life. almost every student has access to a multitude of computers, laptops and tablet devices. it would be crazy to assume an assignment would  notbe written on computer in this day and age.many schools now have a 1-to-1 computer policy, and many districts and states in the united states have mandated computers or ipads across the state for every student,  including los angeles, the second largest school district in the country.but the thing is, when they tried it in la, it wasn't the success they hoped for. that's because the tablets weren't used as much as they expected. rather, it appeared there was a gap between the digital native's love of technology and their use of it in the classroom.this conflicted relationship with computers is also underscored by much of the literature on education. it is also highlighted in professional development and conferences such as  edutech.

He should put sand around the spill in order to contain it so that it won't spread

The correct answer is  b)