1.C | 2.D | 3.B | 4.D
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1. The point in the Moon's orbit when it's farthest away from the Earth is called apogee. On the contrary, the perigee is the point in the Moon's orbit when it's the nearest from the Earth. Those points are very important for tides and other natural phenomenon such as eclipse and in general for the observation of the skies.
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2. Gamma rays are a type of electromagnetic radiation cannot be focused. They diffuse from the emission points until there is an object that stops them. This is the reason why when you have to use gamma rays, you are in other rooms, in order to prevent the radiation to go through them.
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3. The corona it's the outermost layer of the Sun's atmosphere. It's also the part where most of the activity of the sun that we can see take places. It's a subject that has fascinating scientists for centuries and only recently we are studying in more details this interesting and weird place, due to the advancement of technology.
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4. Tides are a result of the gravitational attraction of the Sun and Moon. The Earth, the Sun and the Moon have masses and their own gravities. The interactions between these corps causes tides movement on Earth that are fundament to life on the planet, because they are a fundamental part in the cycle of water and air.
Answer:
1.C
2.D
3.B
4.D
Explanation:
1. The orbit on which moon revolve around earth has a perigee point which is the nearest point to earth while apogee is the farthest point to planet earth.
A penumbral is a region in which occluding body obscure a portion of light. It has no relation with the moon's orbit. Also an eclipse is a phase based on position of moon with respect to earth and sun
Hence, option C is correct
2. Gamma rays are extremely powerful and energetic as they are produced as a result of radiation and hence it is very difficult to focus them on normal lenses which are designed to focus only visible light. They interact with the matter of the focusing surface and destroys them selves.
Hence, option D is correct
3. Corona is the outer surface of stars that extends to millions of kilometers into the space. Sun being a star has corona at its outer layer which is visible only during
total solar eclipse. Hence option B is correct
4. When the gravitational force of moon attracts the water on earth, it presume a rising and falling form that is termed as tides.
Hence option D is correct
1. You can build Earthquake resistant buildings- These are built with deep foundations. From rubber absorbers to concrete reinforced with steel.
2.Earthquake drill- They do this in Japan. and they basically practise what to do in the event of an actual earthquake happening
3. you can also be prepared. Have extra food and water.
have a higher magnification capability because they use natural light
allow you to view living cells, while electron microscopes do not
have a greater resolution available because they use white light
Answer:
allow you to view living cells, while electron microscopes do not
Explanation:
An electron microsocpes electrons will kill living samples
Answer:
allow you to view living cells, while electron microscopes do not
Explanation:
An electron microsocpes electrons will kill living samples
Answer:
As one age, the bodies become subtle to cold temperatures. This is generally due to decline in the metabolic rate. As one age, the bodies lose the tendency of producing sufficient heat to sustain the usual temperature of 98.6 degrees. In addition to this, thinning of the skin is another thing, which may contribute to the feeling of cold in older individuals.
With age, the physical tendency of the body declines, and the body does not function as it used to earlier. A decline in temperature can make the older adults very cold, even if they are dressed warmly. There are various researchers, which shows that older individuals exhibit low body temperatures in comparison to the younger ones.
Some of the factors that can contribute to cold sensitivity in older adults are:
1. Poor metabolic rate
2. Loss of elasticity of the blood vessels.
3. Low blood pressure
4. Thinning of the fat layer underneath the skin
5. Physical issues and exposure to cold water