Foreshocks may occur days, or even years, before the actual major earthquake itself.
Foreshocks are detected in almost half of all moderate to large earthquakes, and they are detected in over 70% of earthquakes that are above 7.0 in magnitude on the Richter scale. Foreshocks then lead to the main shock, which may be followed by after shocks, depending on the strength of the main shock.
Answer:
Together, the gravitational pull of the moon and the sun affect the Earth’s tides on a monthly basis. When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides — both commonly called spring tides.
Explanation:
Tidal Variations - The Influence of Position and Distance Together, the gravitational effects of the moon and the sun affect the Earth’s tides on a monthly basis. The elliptial orbits of the moon around the Earth and the Earth around the sun have substantial effects on the earth’s tides.
The correct answer to your question is D. covalent.
1. RNA has a ribose sugar instead of a deoxyribose sugar like DNA.
2. RNA is a single-stranded nucleic acid.
3. RNA nucleotides have a uracil base instead of thymine.
Explanation:
Enzyme activity can be affected by a variety of factors, such as temperature, pH, and concentration. Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate.