Answer the following question given this paragraph: Chemical cells are found in batteries. They produce voltage by means of chemical reactions. Chemical cells have two electrodes, which are strips of different materials, such as zinc and carbon. The electrodes are suspended in an electrolyte. This is a substance that contains free ions, which can carry electric current. The electrolyte may be either a paste, in which case the cell is called a dry cell, or a liquid, in which case the cell is called a wet cell. Flashlight batteries contain dry cells. Car batteries contain wet cells. Q: Batteries produce voltage through what type of reaction? Choices: - liquid - non-chemical - thermal - chemical A:
chemical
(Question)
Answer the following question given this paragraph: Another related process is effusion. Effusion is the process of a confined gas escaping through a tiny hole in its container. Effusion can be observed by the fact that a helium-filled balloon will stop floating and sink to the floor after a day or so. This is because the helium gas effuses through tiny pores in the balloon. Both diffusion and effusion are related to the speed at which various gas molecules move. Gases that have a lower molar mass effuse and diffuse at a faster rate than gases that have a higher molar mass. While they are similar processes, there is a key difference between diffusion and effusion. Diffusion describes the process of a gas spreading out at a constant pressure, such as throughout a room. Effusion, on the other hand, describes the process of a gas spreading out from a high pressure surroundings to lower pressure surroundings. Q: What is the process of a confined gas escaping through a tiny hole in its container called? Choices: - effluent - dissipation - dilution - effusion A:
(Answer)
effusion
Ques: Answer the following question given this paragraph: The fundamental and overtones can be present simultaneously in a variety of combinations. For example, middle C on a trumpet has a sound distinctively different from middle C on a clarinet, both instruments being modified versions of a tube closed at one end. The fundamental frequency is the same (and usually the most intense), but the overtones and their mix of intensities are different and subject to shading by the musician. This mix is what gives various musical instruments (and human voices) their distinctive characteristics, whether they have air columns, strings, sounding boxes, or drumheads. In fact, much of our speech is determined by shaping the cavity formed by the throat and mouth and positioning the tongue to adjust the fundamental and combination of overtones. Simple resonant cavities can be made to resonate with the sound of the vowels, for example. (See Figure 17.30. ) In boys, at puberty, the larynx grows and the shape of the resonant cavity changes giving rise to the difference in predominant frequencies in speech between men and women. Q: Along with changes in the shape of the resonant cavity, growth of what organ in pubescent boys leads to the difference in predominant frequencies in speech between men and women? Choices: - pharynx - trachea - esoophagus - larynx A:
Ans: larynx
(Q).
Answer the following question given this paragraph: Certain indicator compounds, such as litmus, can be used to detect acids. Acids turn blue litmus paper red. Q: Acids turn blue litmus paper which color? Choices: - grey - white - purple - red A:
(A).
red
Ques:Answer the following question given this paragraph: Climate maps show average temperatures and rainfall. Q: What type of map would show average temperatures and rainfall? Choices: - landscape map - rainfall map - carbon map - climate map A:

Ans:climate map
Ques:Answer the following question given this paragraph: Neptune's appearance changes due to its turbulent atmosphere. Winds are stronger than on any other planet in the solar system. Wind speeds can reach 1,100 km/h (700 mph). This is close to the speed of sound! The rapid winds surprised astronomers. This is because Neptune receives little energy from the Sun to power weather systems. It is not surprising that Neptune is one of the coldest places in the solar system. Temperatures at the top of the clouds are about 218C (360F). Q: Why does neptune's appearance change? Choices: - the seasons - the changing orbit - the speed of rotation - turbulent atmosphere A:

Ans:
turbulent atmosphere