Q: Sounds or pictures can be encoded in pulses of what, which are then sent through an optical fiber? Read this paragraph and choose the correct option from the provided answers: Besides entertaining a cat, laser light has many other uses. One use is carrying communication signals in optical fibers. Sounds or pictures are encoded in pulses of laser light, which are then sent through an optical fiber. All of the light reflects off the inside of the fiber, so none of it escapes. As a result, the signal remains strong even over long distances. More than one signal can travel through an optical fiber at the same time, as you can see in the Figure below . Optical fibers are used to carry telephone, cable TV, and Internet signals. Choices: - kinetic energy - microwaves - quasars - laser light A:
laser light

(Question)
Q: Where does an object gain or lose it's energy to during travel through a potential difference? Read this paragraph and choose the correct option from the provided answers: The energy that the object gains or loses when traveling through a potential difference is supplied (or absorbed) by the electric field --- there is nothing else there. Therefore, it follows that electric fields contain energy . Choices: - particle field - magnetic field - wave field - electric field A:
(Answer)
electric field

Ques: Q: What important aspect of the scientific method is a suggested explanation for an event, which can be tested? Read this paragraph and choose the correct option from the provided answers: The Process of Science Biology is a science, but what exactly is science? What does the study of biology share with other scientific disciplines? Science (from the Latin scientia, meaning "knowledge") can be defined as knowledge that covers general truths or the operation of general laws, especially when acquired and tested by the scientific method. It becomes clear from this definition that the application of the scientific method plays a major role in science. The scientific method is a method of research with defined steps that include experiments and careful observation. The steps of the scientific method will be examined in detail later, but one of the most important aspects of this method is the testing of hypotheses by means of repeatable experiments. A hypothesis is a suggested explanation for an event, which can be tested. Although using the scientific method is inherent to science, it is inadequate in determining what science is. This is because it is relatively easy to apply the scientific method to disciplines such as physics and chemistry, but when it. Choices: - scientific control - string theory - independent variable - hypothesis A:
Ans: hypothesis

(Q).
Q: Earthquakes at convergent plate boundaries mark the location of the what? Read this paragraph and choose the correct option from the provided answers: Earthquakes at convergent plate boundaries mark the location of the subducting lithosphere. The motion of the lithosphere as it plunges through the mantle causes the quakes ( Figure below ). At greater depths, the plate heats up enough to deform plastically. Choices: - abducting lithosphere - speeding lithosphere - shorting lithosphere - subducting lithosphere A:
(A).
subducting lithosphere

Ques:Q: In what type of mining must tunnels be blasted into the rock so that miners and equipment can get to the ore? Read this paragraph and choose the correct option from the provided answers: If an ore is deep below Earth's surface it may be too expensive to remove all the rock above it. These deposits are taken by underground mining. Underground mines can be very deep. The deepest gold mine in South Africa is more than 3,700 m deep (that is more than 2 miles)! There are various methods of underground mining. Underground mining is more expensive than surface mining. Tunnels must be blasted into the rock so that miners and equipment can get to the ore. Underground mining is dangerous work. Fresh air and lights must be brought in to the tunnels for the miners. The miners breathe in lots of particles and dust while they are underground. The ore is drilled, blasted, or cut away from the surrounding rock and taken out of the tunnels. Sometimes there are explosions as ore is being drilled or blasted. This can lead to a mine collapse. Miners may be hurt or killed in a mining accident. Choices: - open-pit mining - strip mining - gold mining - underground mining A:

Ans:underground mining

Ques:Q: Birds that move pollen from flower to flower are called what? Read this paragraph and choose the correct option from the provided answers: Nectar-feeding birds are important pollinators , meaning they move the pollen from flower to flower to help fertilize the sex cells and create new plants. Hummingbirds, sunbirds, and the honey-eaters are common pollinators. Choices: - carnivores - spores - frogs - pollinators A:

Ans:
pollinators