Answer the following question given this paragraph: There are two basic types of pollutants in air. They are known as primary pollutants and secondary pollutants. Q: What are two basic types of pollutants in the air? Choices: - smog and coal - organic and inorganic - pesticides and smog - primary and secondary pollutants A:
primary and secondary pollutants
(Question)
Answer the following question given this paragraph: Did you ever make a "volcano," like the one in Figure below , using baking soda and vinegar? What happens when the two substances combine? They produce an eruption of foamy bubbles. This happens because of a chemical change. A chemical change occurs when matter changes chemically into an entirely different substance with different chemical properties. When vinegar and baking soda combine, they form carbon dioxide, a gas that causes the bubbles. It's the same gas that gives soft drinks their fizz. Q: What type of change occurs when matter changes chemically into an entirely different substance with different chemical properties? Choices: - physical - material - genetic - chemical A:
(Answer)
chemical
Ques: Answer the following question given this paragraph: When a sarcomere shortens, some regions shorten whereas others stay the same length. A sarcomere is defined as the distance between two consecutive Z discs or Z lines; when a muscle contracts, the distance between the Z discs is reduced. The H zonethe central region of the A zonecontains only thick filaments and is shortened during contraction. The I band contains only thin filaments and also shortens. The A band does not shortenit remains the same lengthbut A bands of different sarcomeres move closer together during contraction, eventually disappearing. Thin filaments are pulled by the thick filaments toward the center of the sarcomere until the Z discs approach the thick filaments. The zone of overlap, in which thin filaments and thick filaments occupy the same area, increases as the thin filaments move inward. Q: The distance between two consecutive z discs or z lines is called what? Choices: - contractile - ligule - radius - sarcomere A:
Ans: sarcomere
(Q).
Answer the following question given this paragraph: Chemoautotrophs are cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source. Chemoautotrophs include prokaryotes that break down hydrogen sulfide (H 2 S the "rotten egg" smelling gas), and ammonia (NH 4 ). Nitrosomonas , a species of soil bacterium, oxidizes NH 4 + to nitrite (NO 2 - ). This reaction releases energy that the bacteria use. Many chemoautotrophs also live in extreme environments such as deep sea vents. Q: What are the cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source? Choices: - staurikosaurus - fluctuations - Sediments - chemoautotrophs A:
(A).
chemoautotrophs
Ques:Answer the following question given this paragraph: Roundworms have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Q: What is the body of a roundworm covered with? Choices: - thick scales - thin epidermis - slime - tough cuticle A:

Ans:tough cuticle
Answer the following question given this paragraph: Force is defined as a push or pull acting on an object. Forces include gravity, friction, and applied force. Q: What is defined as a push or pull acting on an object? Choices: - effort - motion - work - force A:
force