Ques: 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:
Ans: ion

Ques: Answer the following question given this paragraph: Water can be a solid, liquid, or a gas. Q: Water can be a solid, liquid, and what other form? Choices: - ooze - square - plasma - gas A:
Ans: gas

Ques: Answer the following question given this paragraph: Now we move on to recycle. Sometimes it may be difficult to understand the differences between reusing and recycling. Recycling involves processing used materials in order to make them suitable for other uses. That usually means taking a used item, breaking it down, and reusing the pieces. Even though recycling requires extra energy, it does often make use of items which are broken, worn out, or cannot be reused. Q: What is the process of processing used material into new ones called? Choices: - remake - renew - reuse - recycling A:
Ans: recycling

Ques: Answer the following question given this paragraph: A transverse wave is characterized by the high and low points reached by particles of the medium as the wave passes through. The high points are called crests, and the low points are called troughs. You can see both in the Figure below . Q: What are the high points in a transverse wave called? Choices: - apex - peaks - waves - crests A:
Ans:
crests