Explanation: The shape of a river's stream bed affects the speed and eroding power of a river by influencing the amount of friction between the water flowing through the river and the stream bed below. Friction is the force that opposes the motion of one surface as it moves across another surface. In a river, there is friction between the flowing water and the stream bed beneath it. Where a river is deep, less water comes into contact with the stream bed, so there is less friction. The reduced friction means there is less opposition to the water's motion, so the river flows at a greater speed and has more kinetic energy for erosion. On the other hand, where a river is shallow, more water comes into contact with the stream bed, so there is more friction. The increased friction means there is more opposition to the water's motion, so the river flows at a lesser speed and has less kinetic energy for erosion. Also, the roughness of a stream bed covered with boulders and other obstacles causes the water to flow through the river in a turbulent fashion. This could cause the river to move slower in some cases or erode more in other cases.
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Hello!
To manage solid waste, the steps we can take are :
- <u>Do not burn</u> your waste materials
- <u>Segregate</u> your waste into <u>biodegradable</u> and <u>non-biodegradable materials</u>.
- Reuse <u>peeled fruits</u> and <u>vegetables</u> as fertilizer.
- Recycle your <u>biodegradable materials</u> into usable ones
- If you use <u>plastic grocery bags</u>, reuse them for your small trash.
- Buy products that are <u>organic</u> like food, soap, and detergent.
- Do not throw your waste in the streets, dispose properly.
- When going to market, use <u>reusable bags</u>, or eco-bags.
- Old clothes can be used as rags.
- Minimize the use of plastic in any occasion.
The earth has about seven primary plates that make up the earths surface.
Solubility is the relative ability to dissolve
Example could be mixing sugar and water
Answer:
The correct answer is option A. "directional selection".
Explanation:
Directional selection is a type of natural selection at which traits with extreme characteristics are selected over traits with medium characteristics. In this case, a long-term climatic change resulted in all seeds that are the fountain of food for finch becoming hard. This will result in a directional selection on bill size in the finch population, where large-billed birds will be selected over small and medium-billed birds.
