Matter 3

• 
  Attractive forces between particles are weakest in ____

• Solid

• Liquid

• Gases

• All of these

Answer explanation

In gases, the particles are widely spaced and have high kinetic energy, resulting in weak attractive forces between them. This is because the intermolecular forces in gases are primarily van der Waals forces, which are weaker compared to the stronger forces present in solids and liquids. In solids, the particles are closely packed and have strong attractive forces, while in liquids, the particles are closer together than in gases, leading to stronger intermolecular forces. Therefore, the correct answer is gases.

What is adhesion?

• The force that causes a fluid to stick to something.

• 
  The thickness of a fluid.

• The speed of a fluid.

Answer explanation

Adhesion refers to the force that causes a fluid to stick to something. It is the attraction between the molecules of a fluid and the molecules of a different substance. This force allows liquids to wet surfaces and form a thin film or layer on them. Adhesion is responsible for phenomena like capillary action, where liquids are drawn up into narrow tubes against gravity. It is an important concept in fields such as physics, chemistry, and biology, as it affects various processes and behaviors of fluids.

What is viscosity?

• A measure of the speed of a fluid.

• The thickness of a fluid

• 
  The weight of a fluid.

Answer explanation

Viscosity is a measure of the resistance of a fluid to flow or its internal friction. It refers to the thickness or consistency of a fluid, indicating how easily it can flow. A highly viscous fluid, such as honey, has a high resistance to flow and is thick, while a low viscous fluid, such as water, flows easily and is thin. Therefore, the answer "the thickness of a fluid" accurately describes viscosity.

100 degrees Celsius is the boiling point of:

• pure water

• oxygen gas

• iron metal

The melting point of water in degrees Celsius is:

• 100

• 0

• 25

Substances that have fast-moving particles that are far apart, and have no definite volume nor shape are:

• gases
  

• liquids
  

• solids

In chemistry, room temperature is:

• freezing point
  

• 20 degrees Fahrenheit
  

• 25 degrees Celsius

For an object to be considered matter, it must consist of ___

• weight and volume

• mass and volume

• mass and weight

The simplest form of matter is _______________.

• elements

• compounds

• mixtures

A characteristic that can be observed or measured WITHOUT changing the composition of a substance is a(n):

• chemical property

• physical property

• transitive property