Answer the following question given this paragraph: Refraction is another way that waves interact with matter. Refraction occurs when waves bend as they enter a new medium at an angle. You can see an example of refraction in Figure below . Light bends when it passes from air to water. The bending of the light causes the pencil to appear broken. Q: Light bends when it passes in from what to what? Choices: - air to ground - product to water - water to air - air to water A:
air to water
Answer the following question given this paragraph: Q: The cells of what basic plant structure lack chloroplasts? Choices: - leaf - stem - ferns - root A:
root
Q: Answer the following question given this paragraph: Bacterial contamination in our food often makes the news. There are many bacteria present on raw food, especially raw meat. Campylobacter (pictured above), salmonella, and other microorganisms can be found, even after cooking if the meat has not been sufficiently exposed to the heat. Ionizing radiation can be used to disrupt the DNA-RNA-protein synthesis cycle that allows the bacteria to reproduce. Cobalt-60 is a common radiation source, as is cesium-137. But, just to be safe, order that burger well-done. Q: What kind of radiation can be used to disrupt the dna-rna protein synthesis cycle that allows bacteria to reproduce? Choices: - microwave - non-ionizing - infrared - ionizing A:
A: ionizing
Question: Answer the following question given this paragraph: Nuclear energy is produced by splitting the nuclei of radioactive uranium. This doesn't release air pollution or carbon dioxide, but it does produce dangerous radioactive wastes. Q: What type of energy occurs by splitting the nuclei of radioactive uranium? Choices: - microwave - atomic - kinetic - nuclear A:
Answer: nuclear
*Question*
Answer the following question given this paragraph: Q: Meiosis, like mitosis, is preceded by the duplication of what? Choices: - ribosomes - chloroforms - neutrons - chromosomes A:
**Answer**
chromosomes
(Q).
Answer the following question given this paragraph: One type of molecular compound behaves quite differently than that described so far. A covalent network solid is a compound in which all of the atoms are connected to one another by covalent bonds. Diamond is composed entirely of carbon atoms, each bonded to four other carbon atoms in a tetrahedral geometry. Melting a covalent network solid is not accomplished by overcoming the relatively weak intermolecular forces. Rather, all of the covalent bonds must be broken, a process that requires extremely high temperatures. Diamond, in fact, does not melt at all. Instead, it vaporizes to a gas at temperatures above 3500C. Q: What is a compound in which all of the atoms are connected to one another by covalent bonds? Choices: - covalent bond element - covalent mixture - compound metal - covalent network solid A:
(A).
covalent network solid