X + y = 40
2.25x + 1.75y = 83.50
-1.75x - 1.75y = -70
2.25x + 1.75y = 83.50
.50x = 13.50
27 hotdogs were bought
In order to heat a substance up, you need to h have a light source. For the ocean, the sun is the light source. The Earth is not like a perfect round ball, so it is further stretched out on the sides. This stretched out side is along the center of the Earth (the equator). This means that the equator is closet to the sun and the ocean along the equator is the warmest.
The density of the ocean is simply how hard or soft the ocean is. As you know, ice is harder than water with no ice. This is because of tiny particles known as atoms. Think of it like this: you come back from Mount Everest and you have hot coffee and you are excited, so you run around. If you have cold milk, you are less likely to
Answer:
B
Explanation:
When people get older they pass away so it makes sense that the pyramid decreases with age
Answer:
Option (4)
Explanation:
Water is the most essential element that is required by all living organism. In order to survive, water is needed. Over the years, the use of water has been increasing at a considerably higher rate. At many places, the water level has decreased. This can cause a great problem in the near future as the water on earth is depleting, either by polluting or by making excess use of it.
Currently, water is one of the major resources and one must make limited and proper use of it.
In the United States, a huge amount of water is used for domestic purpose. This includes the water that are usually used for drinking purpose, washing of dishes, toilet flushing, bathing and washing clothes, and so on.
According to the statistical record, it has been noted that in US, the maximum amount of domestic water is used in the toilets.
Thus, the correct answer is option (4).
The main reason why the tectonic plates move is the conversational currents. There is magma between the upper mantle and the asthenosphere that heats up at the upper mantle. The weight is so small that the magma rises with the help of these conversational currents. When the magma has ascended towards the asthenosphere, it has nowhere to go so the magma lies along the asthenosphere. There the magma cools down again because the asthenosphere is colder than the upper mantle, which makes the magma heavier and goes back down to the upper mantle, where the magma heats up again and everything starts all over again and so it goes on over and over again. Scientists have concluded that the earth's gravity causes two other processes that also cause the tectonic plates to move.
Ridge push - in the spreading zones, the sides of the tiles are raised and slide to the side as in a slide.
Slab pull - when a plate is pulled down by gravity in a subduction zone like an anchor.
