Answer the following question given this paragraph: Sometimes atoms lose or gain electrons. Then they become ions . Ions have a positive or negative charge. That's because they do not have the same number of electrons as protons. If atoms lose electrons, they become positive ions, or cations. If atoms gain electrons, they become negative ions, or anions. Q: When an atom gains or loses an electron it becames an? Choices: - electron - photon - neutron - ion A:
ion
(Question)
Answer the following question given this paragraph: In a wheel and axle, force may be applied either to the wheel or to the axle. This force is called the input force. A wheel and axle does not change the direction of the input force. However, the force put out by the machine, called the output force, is either greater than the input force or else applied over a greater distance. Q: What is the term for the force applied to a wheel and axle? Choices: - velocity force - momentum - output force - input force A:
(Answer)
input force
Ques: Answer the following question given this paragraph: Marsupials. Marsupials include the kangaroo, koala, and opossum. Q: Kangaroos, koala and opossums are part of what group? Choices: - primates - cephalopods - monotremes - marsupials A:
Ans: marsupials
(Q).
Answer the following question given this paragraph: Most nonmetals are poor conductors of heat. In fact, they are such poor conductors of heat that they are often used for insulation. For example, the down filling in this sleeping bag is full of air, which consists primarily of the nonmetal gases oxygen and nitrogen. These gases prevent body heat from escaping to the cold outside air. Q: What are the three most common elements in the air we breathe? Choices: - oxygen, nitrogen, H20 - nitrogen, argon, hydrogen - argon, oxygen, hydrogen - nitrogen, oxygen and argon A:
(A).
nitrogen, oxygen and argon
Ques:Answer the following question given this paragraph: The Celsius scale is the standard SI temperature scale. It is equal to the Kelvin scale if you minus 273 from the Celsius reading. Water has a boiling point of and a freezing point of . Q: What temperature scale is obtained by adding 273 degrees from the corresponding celsius temperature? Choices: - whittle scale - seismic scale - ph scale - kelvin scale A:

Ans:kelvin scale
Question: Answer the following question given this paragraph: Amphibians are an important food source for animals such as birds, snakes, raccoons, and fish. Amphibians are also important predators. As larvae, they feed mainly on small aquatic animals such as water insects. They may also feed on algae. As adults, amphibians are completely carnivorous . They may catch and eat worms, snails, and insects, as the frog in Figure below is doing. Unlike other amphibians, caecilians are burrowers . They use their head to dig in the soil, and they feed on earthworms and other annelids. Caecilians can be found in moist soil near rivers and streams in tropical regions. Q: As adults, amphibians are completely _______, meaning they feed on other animals. Choices: - herbivorous - monogamous - omnivorous - carnivorous A:
Answer:
carnivorous