Answer the following question given this paragraph: We have been able to take pictures of only a few exoplanets. Most are discovered because of some tell-tale signs. One sign is a very slight motion of a star that must be caused by the pull of a planet. Another sign is the partial dimming of a star's light as the planet passes in front of it. Q: What celestial body is often discovered because it causes a star to move or to dim? Choices: - satellite - asteroid - comet - exoplanet A:
exoplanet
Answer the following question given this paragraph: The Axial Skeleton The skeleton is subdivided into two major divisionsthe axial and appendicular. The axial skeleton forms the vertical, central axis of the body and includes all bones of the head, neck, chest, and back (Figure 7.2). It serves to protect the brain, spinal cord, heart, and lungs. It also serves as the attachment site for muscles that move the head, neck, and back, and for muscles that act across the shoulder and hip joints to move their corresponding limbs. The axial skeleton of the adult consists of 80 bones, including the skull, the vertebral column, and the thoracic cage. The skull is formed by 22 bones. Also associated with the head are an additional seven bones, including the hyoid bone and the ear ossicles (three small bones found in each middle ear). The vertebral column consists of 24 bones, each called a. Q: The axial skeleton forms the vertical, central axis of the body and includes all bones of the head, neck, chest, and back. it serves to protect the brain, spinal cord, heart, and what else? Choices: - ovaries - knees - intestines - lungs A:
lungs
Q: Answer the following question given this paragraph: Burning of fossil fuels, such as oil, releases carbon into the atmosphere. This carbon must be cycled - removed from the atmosphere - back into living organisms, or it stays in the atmosphere. Increased carbon in the atmosphere contributes to the greenhouse effect on Earth. Q: Carbon released by burning fossil fuels contributes to what effect in the atmosphere? Choices: - shielding effect - smog effect - cloud effect - greenhouse effect A:
A: greenhouse effect
Question: Answer the following question given this paragraph: The eardrum is like the head of a drum. It is a thin membrane stretched tight across the end of the ear canal. The eardrum vibrates when sound waves strike it, and it sends the vibrations on to the middle ear. Q: What hits the eardrum and causes it to vibrate? Choices: - cilia - decibels - microwaves - sound waves A:
Answer: sound waves
*Question*
Answer the following question given this paragraph: Photographs of the sky can be darkened by polarizing filters, a trick used by many photographers to make clouds brighter by contrast. Scattering from other particles, such as smoke or dust, can also polarize light. Detecting polarization in scattered EM waves can be a useful analytical tool in determining the scattering source. There is a range of optical effects used in sunglasses. Besides being Polaroid, other sunglasses have colored pigments embedded in them, while others use non-reflective or even reflective coatings. A recent development is photochromic lenses, which darken in the sunlight and become clear indoors. Photochromic lenses are embedded with organic microcrystalline molecules that change their properties when exposed to UV in sunlight, but become clear in artificial lighting with no UV. Take-Home Experiment: Polarization Find Polaroid sunglasses and rotate one while holding the other still and look at different surfaces and objects. Explain your observations. What is the difference in angle from when you see a maximum intensity to when you see a minimum intensity? Find a reflective glass surface and do the same. At what angle does the glass need to be oriented to give minimum glare?. Q: What is used to darken images of the sky? Choices: - close-up filter - uv filter - neutral density filter - polarizing filters A:
**Answer**
polarizing filters
(Question)
Answer the following question given this paragraph: Destructive interference occurs when the crests of one wave overlap the troughs, or lowest points, of another wave. The Figure below shows what happens. As the waves pass through each other, the crests and troughs cancel each other out to produce a wave with zero amplitude. You can see an animation of destructive interference at this URL: http://phys23p. sl. psu. edu/phys_anim/waves/embederQ1.20200. html. Q: What occurs when the crests of one wave overlap the troughs, or lowest points, of another wave? Choices: - harmful interference - random interference - constructive interference - destructive interference A:
(Answer)
destructive interference