Question: Answer the following question given this paragraph: Covalent bonds are chemical bonds between atoms of nonmetals that share valence electrons. In some covalent bonds, electrons are not shared equally between the two atoms. These are called polar covalent bonds. The Figure below shows the polar bonds in a water molecule (H 2 O). The oxygen atom attracts the shared electrons more strongly than the hydrogen atoms do because the nucleus of the oxygen atom has more positively charged protons. As a result, the oxygen atom becomes slightly negative in charge, and the hydrogen atoms become slightly positive in charge. For another example of polar bonds, see the video at this URL: http://www. youtube. com/watch?v=1lnjg81daBs. Q: What are chemical bonds between atoms of nonmetals that share valence electrons called? Choices: - electron bonds - ionic bonds - gravitational bonds - covalent bonds A:
Answer: covalent bonds

Question: Answer the following question given this paragraph: A car's gas pedal, like the one in Figure below , is sometimes called the accelerator. That's because it controls the acceleration of the car. Pressing down on the gas pedal gives the car more gas and causes the car to speed up. Letting up on the gas pedal gives the car less gas and causes the car to slow down. Whenever an object speeds up, slows down, or changes direction, it accelerates. Acceleration is a measure of the change in velocity of a moving object. Acceleration occurs whenever an object is acted upon by an unbalanced force. Q: What is the measure of the change in the velocity of a moving object called? Choices: - transmission - compression - pressurization - acceleration A:
Answer: acceleration

Question: Answer the following question given this paragraph: Two DNA strands link together in an antiparallel direction and are twisted to form a double helix. The nitrogenous bases face the inside of the helix. Guanine is always opposite cytosine, and adenine is always opposite thymine. Q: What is formed when two dna strands link together in an antiparallel direction and are twisted? Choices: - guanine - anti-helix - RNA - double helix A:
Answer:
double helix