EM Spectrum & Properties of Water

These waves cause & treat cancer:

• Radio waves

• Infrared

• Visible light

• Gamma Rays

Identify the type of EM that is not considered Ionizing

• Gamma

• X-rays

• UV

• Microwaves

What is adhesion?

• attraction between two different molecules

• attraction between the same molecules

• attraction between the same molecules

• another word for molecules

The range of all electromagnetic frequencies, including radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, and gamma rays is called ___.

• UV spectrum

• Color spectrum

• Visible light spectrum

• Electromagnetic Radiation spectrum

What is cohesion?

• attraction between two different molecules

• attraction between the same molecules

• when a substance dissolves into another subsubstance

• another word for molecules

Identify the statement that makes a source MORE credible

• Published within the last 10 years

• Information from a government or educational institution

• Information written by an expert or Doctor in the field

• All are correct

Which pair of water molecules shown below are most likely to form a hydrogen bond in their current positions?

• Pair I

• Pair II

• Pair III

• All are likely

Why is capillary rise less with hexane than with water, as shown in the picture?

• Hexane is less polar.

• Hexane has less cohesion between its molecules.

• Hexane creates weaker adhesive forces.

• All of the above.

Identify the correct statement regarding types of EM that are ionizing

• They have high frequencies.

• They are considered harmful & can damage cells.

• They have short wavelengths.

• All are correct

As shown below, a ring can be lifted through a liquid without breaking the surface film due to surface tension.  In which type of liquid would you expect to find the greatest surface tension and why?

• Polar liquids, because they have strong cohesive forces.

• Nonpolar liquids, because they have weak cohesive forces.

• Polar liquids, because they have weak cohesive forces.

• Nonpolar liquids, because they have strong cohesive forces.