Answer the following question given this paragraph: In this chapter, you saw how pressure and buoyancy of fluids can be used to make work easier from raising a car on a lift to floating a ship on the ocean. Devices that make work easier are called machines in physics. Q: In physics, what do you call devices that make work easier? Choices: - circuits - levers - tools - machines A:
machines
(Question)
Answer the following question given this paragraph: Carboxylic acids can form esters with alcohols. Q: Carboxylic acids can form what with alcohols? Choices: - lipids - ketones - aldehydes - esters A:
(Answer)
esters
Ques: Answer the following question given this paragraph: 22.3 Magnetic Fields and Magnetic Field Lines Einstein is said to have been fascinated by a compass as a child, perhaps musing on how the needle felt a force without direct physical contact. His ability to think deeply and clearly about action at a distance, particularly for gravitational, electric, and magnetic forces, later enabled him to create his revolutionary theory of relativity. Since magnetic forces act at a distance, we define a magnetic field to represent magnetic forces. The pictorial representation of magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. As shown in Figure 22.15, the direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points. The magnetic field is traditionally called the Bfield. Q: What is the magnetic field traditionally referred to as? Choices: - m-field - charged field - spicule - bfield A:
Ans: bfield
(Q).
Answer the following question given this paragraph: Scientists think that Europa is a good place to look for extraterrestrial life. Europa is the smallest of the Galilean moons. The moon's surface is a smooth layer of ice. Scientists think that the ice may sit on top of an ocean of liquid water. How could Europa have liquid water when it is so far from the Sun? Europa is heated by Jupiter. Jupiter's tidal forces are so great that they stretch and squash its moon. This could produce enough heat for there to be liquid water. Numerous missions have been planned to explore Europa, including plans to drill through the ice and send a probe into the ocean. However, no such mission has yet been attempted. Q: What is the smallest of the galilean moons? Choices: - phoebe - demos - aura - europa A:
(A).
europa
Ques:Answer the following question given this paragraph: Bacteria reproduce through a process called binary fission . During binary fission, the chromosome copies itself, forming two genetically identical copies. Then, the cell enlarges and divides into two new daughter cells. The two daughter cells are identical to the parent cell. Binary fission can happen very rapidly. Some species of bacteria can double their population in less than ten minutes!. Q: Bacteria reproduce through what process, where the chromosome copies itself, forming two genetically identical copies? Choices: - multiple fission - residual fission - nuclear fission - binary fission A:

Ans:binary fission
Answer the following question given this paragraph: As you age, you might start noticing pain in your knees or elbows. These are examples of joints. Joints are the part of the skeletal system that connect your bones. Joint pain is a common problem as people age. Q: Knees and elbows are examples of what part of the skeletal system? Choices: - cartilage - muscles - nerves - joints A:
joints