Answer:
The large space behind the lens ( the vitreous chamber ) contains a thick, gel - like fluid called vitreous humor or vitreous gel. These two fluids press against the inside of the eyeball and help the eyeball keep its shape.
Answer:
C. flows briefly after a period of rainfall
Explanation:
A wadi is dry riverbed that only contains water seasonally. It usually found in arid regions.
- Wadi derived from the Arabic word Wad which means valley.
- For most part of the year, a wadi is usually dry.
- During a brief stint of rainfall, the bed blossoms with water.
- The bed is found in a valley in most arid places.
- They can hold rain water for a short time before the bed dries up.
Answer:
B
Explanation:
While there are indeed many natural resources, the use and extraction of these resources has not always been done in an environmentally friendly way.
Potable water is still a scarce commodity and is slowly being supplied to the population. Despite the efforts, a combination of salt water infiltration into the water table and chemical spills from refineries and other industrial sites make water pollution a serious issue.
Answer:
The water in ocean, lakes and rivers are heated by the Sun, sunlight hits the ocean which is dispersed by the first 1000 meters of the oceans surface. This hot water is mixed with the cold water at the bottom of the ocean by ocean waves and this is the reason why ocean waves are at a regular temperature.
In a lake the water is heated the same way but there is not much water to mix the hot water with the cold so the water in the lake seems hotter than the ocean.
In a river the water keeps on flowing which mixes the hot water with the cold and the temperature remains regular.
Explanation:
Sound is a wave which is created by vibration, and these sound waves can travel in different mediums for example, air, liquid and even solid.
The water in ocean, lakes and rivers are heated by the Sun, sunlight hits the ocean which is dispersed by the first 1000 meters of the oceans surface. This hot water is mixed with the cold water at the bottom of the ocean by ocean waves and this is the reason why ocean waves are at a regular temperature.
In a lake the water is heated the same way but there is not much water to mix the hot water with the cold so the water in the lake seems hotter than the ocean.
In a river the water keeps on flowing which mixes the hot water with the cold and the temperature remains regular.
Answer:
B.
C.
Explanation:
Factors control the cooling time of magma within the crust include surface water passing over the magma and the depth at which the magma cool.
Surface water passing over the magma absorbs the water and carries away heat and magma present in depths is cooler than surface because magma rises to earth surface due to high pressure and that is hot.
Hence, the correct option is "B. and C."
