How did astronomers use technology to identify characteristics of the crab nebula

Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment? type of soil type of plants exposure to sunlight method for measuring the growth

How many soccer players are there that are only getting paid as a career? ? plz give correct info

The tendency to seek out individuals who represent the same level of physical attractiveness as ourselves is explained as