Answer:
2. The bottom layers of the rock could have formed before life occurred.
Explanation:
The bottom layers of the rock could have formed before life occurred because there is no fossil is present. If there is life at that time so the fossils are present at the bottom layer so the absence indicates that is no life present at that time. The bottom layer is older than the upper layer so that's why fossils of bacteria are found in the upper layer of the rock.
Convection currents is the movement of a fluid or a gas from one particular location to another location. This motion is created by the difference in the density or the temperature of the fluid or gas in the two locations. It could also be used in the movement of energy from one location to another due to the temperature gradient. For convection current in the atmosphere, it could be describe in the rising of warm air towards the upper portion of the atmosphere while the colder air goes under it. This happens because warmer air would have less density as compared to the colder air.
Snow is better than flooding because flooding does more damage to our society. Plenty of accidents such as nuclear station shutdowns are caused by floods and other water-related disasters. Snowing, on the other hand, is only annoying since you have to go outside in the cold shoveling snow, only to find your driveway completely full of snow the next day.
D. The Pacific Ocean is surrounded by a 40,000km horseshoe shape ring.
If this is a true or false question, the answer is false.