Joseph studied whether different materials can block certain electromagnetic waves by testing television reception in different parts of the house. at each part of the house, joseph used a different antenna. the experiment could have been improved by
testing reception of a different channel during each trial.
using the same antenna during each trial.
measuring the antenna length in centimeters.
measuring the distance to the television station.
1: species that are adapted to live in equilibrium at carrying capacity
there are two types of specie based on the strategies they use for the reproduction, growth and survival. k and r selected species. the alphabet k simply indicate the carrying capacity or the number of individuals that can be supported by the habitat and available resources.
some important traits of k selected organisms include: low reproductive rate,low offspring mortality, strong competitive ability, good parental care,limited offspring dispersal and strong competitive ability.
2. population growth that reaches equilibrium and carrying capacity population
logistic growth is the type of growth pattern in which when the population reaches carrying capacity the growth rate of the population decreases. carrying capacity is the highest number of organisms of a population that the environment can support.
3. death rate
mortality or mortality rate is typically expressed in terms of deaths per 1,000 individuals per year; so, a mortality rate of 9.5 (out of 1,000) in a population of 1,000 would mean 9.5 deaths per year in that entire population, or 0.95% out of the total.
4. birth rate
birth rate or natality is simply indicative of number of individuals born per thousand of population per year.
5. a group of interacting individuals of the same species within the same geographic area
for example, a population of sparrows living on a certain area make a population of that area.
6. the number of organisms living in a particular area
population density is indicative of the number of population per unit area. for example: if there are 2000 human population living in an area of 25 sq km, the population density will be population divided by area, that will be equal to 80.
the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.