The ultra sound waves coming from the transmitter pass through the body and once they hit a boundary (the baby) they are partially reflected back to the transmitter and the image appears on the screen. The longer the time taken is to reflect, the further away it is, so darker/lighter on the picture.
9. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.
10.Properties that help geologists identify a mineral in a rock are: color, hardness, luster, crystal forms, density, and cleavage.
11.The feldspar-group, a very complex mixture of oxygen, silicon, aluminum and trace elements like sodium, potassium, calcium and more exotic elements like barium, are by far the most common minerals, making up almost 58% of all to a geologist accessible rocks, especially magmatic and metamorphic ones.
12.minerals are really very important in our life as they are used in our daily purposes and we use for example iron daily we use iron almirahs etc ,......
we use aluminium, diamond etc . in our daily life we use aluminium foils that are used to pack food items etc ,. there are many examples such as these ....
Minerals are play important role in our life. Everything we use from a tiny ship to tower are building is made from a mineral. We use minerals in our daily life for example tooth paste its cover and brush everything is made from minerals. All living things also need minerals
Find the sunny spot, dig and loosen up the soil, mix the nutrients, plants the seeds , and finally water them well.
Sympathetic Nervous System; Parasympathetic Nervous System
Alma is walking in a park. Suddenly, a wild dog charges toward her. Alma is frightened. The sympathetic nervous system starts to respond by increasing her heart rate and dilating her pupils. After running for a few minutes, Alma realizes that the dog has fallen far behind. At this point, her parasympathetic nervous system starts working to relax her body by slowing down her heart rate and constricting her pupils.
The sympathetic nervous system and the parasympathetic nervous system are components of the autonomic nervous system. The sympathetic nervous system, known as the “fight or flight system” activates the neuronal and hormonal response to stress. It prepares the body to respond to threatening situations by causing effects such as pupil dilation, increased sweating, increased heart rate and blood pressure. The parasympathetic nervous system known as the "rest and digest system” is the opposite of sympathetic nervous system. It inhibits a physiological response and it functions by reducing heart rate, constriction of pupil and relaxation of sphincter muscles in the gastrointestinal tract.