Answer the following question given this paragraph: Unlike ethers, esters have a carbonyl group. Unlike carboxylic acids, esters have no acidic hydrogen atom; they have a hydrocarbon group in its place. Q: Carboxylic acids have an acidic hydrogen atom, but esters do not. what do esters have in place of an acidic hydrogen atom? Choices: - synthesis group - carbonation group - crystallization group - hydrocarbon group A:
hydrocarbon group
Answer the following question given this paragraph: All musical instruments create sound by causing matter to vibrate. Most musical instruments use resonance to amplify sound waves and make sounds louder. Most musical instruments also have a way of changing the frequency of sound waves, which changes the pitch of the sounds. Q: Changing the frequency of sound waves, will change the _________ of the sound of a musical instrument? Choices: - velocity - distance - direction - pitch A:
pitch
Q: Answer the following question given this paragraph: Most protists are so small that they can be seen only with a microscope. Protists are mostly unicellular (one-celled) eukaryotes. A few protists are multicellular (many-celled) and surprisingly large. For example, kelp is a multicellular protist that can grow to be over 100-meters long ( Figure below ). Multicellular protists, however, do not show cellular specialization or differentiation into tissues. That means their cells all look the same and, for the most part, function the same. On the other hand, your cells often are much different from each other and have special jobs. Q: What type of eukaryotes are protists normally? Choices: - multicellular - photosynthetic - immature - unicellular A:
A: unicellular
Question: Answer the following question given this paragraph: Sulfur oxides are produced when sulfur and oxygen combine. This happens when coal that contains sulfur burns. Q: What is produced when sulfur and oxygen combine? Choices: - Acidic oxides - hydrogen oxide - Basic Oxides - sulfur oxide A:
Answer: sulfur oxide
*Question*
Answer the following question given this paragraph: In a transverse wave, such as a wave in a rope, the medium vibrates at right angles to the direction that the wave travels. The high points of transverse waves are called crests, and the low points are called troughs. Q: What do you call the high and low points of transverse waves? Choices: - echos and troughs - waves and troughs - bands and troughs - crests and troughs A:
**Answer**
crests and troughs
*Question*
Answer the following question given this paragraph: Examples of amorphous solids include glass, rubber, and plastics. Q: Glass, rubber, and plastics are examples of which type of solids? Choices: - dubious - aqueous - porous - amorphous A:
**Answer**
amorphous