Answer the following question given this paragraph: Air pollution may also cause acid rain. This is rain that is more acidic (has a lower pH) than normal rain. Acids form in the atmosphere when nitrogen and sulfur oxides mix with water in air. Nitrogen and sulfur oxides come mainly from motor vehicle exhaust and coal burning. Q: Acid rain may be caused by what? Choices: - hurricanes - water pollution - volcanos - air pollution A:
air pollution
(Question)
Answer the following question given this paragraph: The heart contracts rhythmically to pump blood to the lungs and the rest of the body. Specialized cardiac muscle cells trigger the contractions. Q: The heart contracts rhythmically to pump what to the lungs and the rest of the body? Choices: - Bile - Cerumen - Chyle - blood A:
(Answer)
blood
Ques: Answer the following question given this paragraph: The seafloor spreading hypothesis brought all of these observations together in the early 1960s. Hot mantle material rises up at mid-ocean ridges. The hot magma erupts as lava. The lava cools to form new seafloor. Later, more lava erupts at the ridge. The new lava pushes the seafloor that is at the ridge horizontally away from ridge axis. The seafloor moves!. Q: New seafloor forms when what object cools? Choices: - ash - debris - rain - lava A:
Ans: lava
(Q).
Answer the following question given this paragraph: Mitosis , or division of the nucleus, occurs only in eukaryotic cells. By the time mitosis occurs, the cell's DNA has already replicated. Mitosis occurs in four phases, called prophase, metaphase, anaphase, and telophase. You can see what happens in each phase in Figure below . The phases are described below. You can also learn more about the phases of mitosis by watching this video: https://www. youtube. com/watch?v=gwcwSZIfKlM . Q: Eukaryotic cells undergo what kinds of divisions that more primitive cells do not? Choices: - budding - meiosis - homologous - mitosis A:
(A).
mitosis
Ques:Answer the following question given this paragraph: A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements. Periods 6 and 7 have 32 elements because the two bottom rows that are separated from the rest of the table belong to those periods. They are pulled out in order to make the table itself fit more easily onto a single page. Q: A period is a horizontal row of the what? Choices: - cycles table - phases table - species table - periodic table A:

Ans:periodic table
Ques:Answer the following question given this paragraph: Q: How many electrons does lithium have? Choices: - four - seven - two - three A:

Ans:
three