*Question*
Q: Two important types of waves include longitudinal waves and what other kind?   Read this paragraph and choose the correct option from the provided answers:  Like transverse waves, longitudinal waves are mechanical waves, which means they transfer energy through a medium. Unlike transverse waves, longitudinal waves cause the particles of medium to move parallel to the direction of the wave. They are most common in springs, where they are caused by the pushing an pulling of the spring. Although the surface waves on water are transverse waves, fluids (liquids, gases, and plasmas) usually transmit longitudinal waves.   Choices:  - phenomena  - slow  - irregular  - transverse   A:
**Answer**
transverse

*Question*
Q: What of a electromagnetic wave can be calculated using the wave equation due to their speed always being constant?   Read this paragraph and choose the correct option from the provided answers:  Green light has a higher frequency than microwaves. It is possible to calculate it, but since the speed of an electromagnetic wave is constant we know that waves with higher wavelengths must have a lower frequency based on the wave equation.   Choices:  - oscillation  - resonance  - sound  - frequency   A:
**Answer**
frequency

*Question*
Q: All matter in the universe is composed of one or more unique pure substances called what?   Read this paragraph and choose the correct option from the provided answers:  The Levels of Organization To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of which are hydrogen, oxygen, carbon, nitrogen, calcium, and iron. The smallest unit of any of these pure substances (elements) is an atom. Atoms are made up of subatomic particles such as the proton, electron and neutron. Two or more atoms combine to form a molecule, such as the water molecules, proteins, and sugars found in living things. Molecules are the chemical building blocks of all body structures.   Choices:  - atoms  - molecules  - compounds  - elements   A:
**Answer**
elements

*Question*
Q: These microorganisms are abundant in the human digestive track and serve many roles.  what are they?   Read this paragraph and choose the correct option from the provided answers:  Bacteria provide vital ecosystem services. They are important decomposers. They are also needed for the carbon and nitrogen cycles. There are billions of bacteria inside the human intestines. They help digest food, make vitamins, and play other important roles. Humans also use bacteria in many other ways, including:.   Choices:  - antioxidants  - pathogens  - tumors  - bacteria   A:
**Answer**

bacteria