The one that is blue is a hotter star
When studying the temperature of a star, the scientists first look for color. If the color is more reddish, it’s cooler; if it’s yellow/orange, it is a warmer star; and if it’s a blue star, it’s a hot star
Answer:
During high tide when the level of seawater rises, more sea water is brought into the estuary. This makes the water very salty and thus increases the percentage of dissolved salt in the estuary. Therefore, at high tide, the salinity of an estuary increases significantly.
Explanation:
The bending of light rays happens when the light rays hits an object. It moves in various directions thereby letting us to view that object that the bounced off.
<u>Explanation:</u>
Light gets reflected to human eyes and other body parts, when they hit a flat mirror. The bouncing off is not accurate in human heads and other parts that faces the mirror. The refracted rays from human bodies starts to hit at different angles in the mirror and are reflected back accurately. This is the reason for the backward appearance of mirror images to human eyes.
The light is reflected backward to the point behind the mirrors that are of Convex type. Hence the obtained image will be smaller and farther that its originals. The light will be drawn into the mirror's center point and hence the resultant image will be larger than the original object because of the light reflected by a concave mirror type.
the world's current population is 7.3 billion and the world population in 1915 was 1.8 billion. The increase over the past century is 7.3 billion - 1.8 billion = 5.5 billion. So, the correct answer would be "more than 5 billion" (option D).
<span>Submerged basaltic volcanoes that are higher than 1 km
are called seamounts, letter D. They are underwater mountain formed by volcanic
activity. They do not reach the sea level and is not considered an island. </span>
