Q: Earth acts like a giant version of what device, with angular momentum along its axis and pointing at polaris, the north star? Read this paragraph and choose the correct option from the provided answers: Earth itself acts like a gigantic gyroscope. Its angular momentum is along its axis and points at Polaris, the North Star. But Earth is slowly precessing (once in about 26,000 years) due to the torque of the Sun and the Moon on its nonspherical shape. Choices: - compass - telescope - accelerator - gyroscope A:
gyroscope

(Question)
Q: The rocks that are taken from a mine are full of valuable minerals plus rock that isn't valuable. what is this rock called? Read this paragraph and choose the correct option from the provided answers: Most minerals are a combination of metal and other elements. The rocks that are taken from a mine are full of valuable minerals plus rock that isn't valuable. This is called waste rock. The valuable minerals must be separated from the waste rock. One way to do this is with a chemical reaction. Chemicals are added to the ores at very high temperatures. Choices: - garbage rock - compost rock - empty rock - waste rock A:
(Answer)
waste rock

Ques: Q: What is the phenomenon in which light and sound waves become circular at the point source of a barrier? Read this paragraph and choose the correct option from the provided answers: When a series of straight waves strike an impenetrable barrier, the waves stop at the barrier. However, the last particle of the medium at the back corner of the barrier will create circular waves from that point, called the point source. This can be seen in the image below. This phenomenon is called diffraction , and it occurs in liquid, sound, and light waves. While the waves become circular waves at the point source, they continue as straight waves where the barrier does not interfere with the waves. Choices: - refraction - sonic wave - reflection - diffraction A:
Ans: diffraction

(Q).
Q: What is each half of the cerebrum called? Read this paragraph and choose the correct option from the provided answers: The cerebrum is divided into a right and left half ( Figure above ). Each half of the cerebrum is called a hemisphere. The two hemispheres are connected by a thick bundle of axons called the corpus callosum . It lies deep inside the brain and carries messages back and forth between the two hemispheres. Choices: - demisphere - a describe - a biplane - a hemisphere A:
(A).
a hemisphere

Ques:Q: What term is used to describe birds that mate for an entire season or even stay paired for their entire life? Read this paragraph and choose the correct option from the provided answers: These birds are pairing up so that they can produce offspring. Many birds are monogamous , keeping the same mate for an entire season. In some species, they even stay paired for their entire life. Choices: - asexual - polygamous - homogeneous - monogamous A:

Ans:monogamous

Question: Q: What type of light can mosquitoes see? Read this paragraph and choose the correct option from the provided answers: A: Some animals can see light in the infrared or ultraviolet range of wavelengths. For example, mosquitoes can see infrared light, which is emitted by warm objects. By seeing infrared light, mosquitoes can tell where the warmest, blood-rich areas of the body are located. Choices: - trichina - neon - spicule - infared A:
Answer:
infared