Answer:
To prepare for a trip, camels would be fattened up for the journey across the desert. Caravans moved at about three miles per hour and it took them 40 days to cross the Sahara Desert. Muslim traders spread Islam throughout Western Africa. Islamic law helped to lower crime rates and also spread the common language of Arabic, thus encouraging trade.
Explanation:
Answer:
Sedimentary rocks such as limestone or shale are hardened sediment with sandy or clay-like layers (strata). They are usually brown to gray in color and may have fossils and water or wind marks. Metamorphic rocks such as marble are tough, with straight or curved layers (foliation) of light and dark minerals.
Explanation:
Answer:
There is a high positive correlation between sleep and exam performance.
Explanation:
The concept of correlation indicates an association, that is to say, it is used for measuring how much two variables relate to each other. The 3 results of a correlational study are positive, negative, and no correlation. A positive correlation takes place between 2 variables that can increase or decrease together. In this case, the more students sleep, the better they performed at their exams.
