How do scientists use radioactive dating to determine the age of a fossil? Radioactive Dating of Fossils Scientists find the ratio of parent isotope to daughter isotope. By comparing this ratio to the half-life logarithmic scale of the parent isotope, they are able to find the age of the rock or fossil in question. How […]
What are two unique characteristics about each inner planet?
What are two unique characteristics about each inner planet? All of the inner planets are solid, dense, rocky planets. The inner planets either do not have moons or have just one (Earth) or two (Mars). None of the inner planets have rings. Compared to the outer planets, the inner planets have shorter orbits around the […]
What are the 3 types of US foreign aid today?
What are the 3 types of US foreign aid today? What Are the Different Types of Foreign Aid? Types of Foreign Assistance. Disbursements vs. Aid Received. Bilateral Aid. Military Aid. Multilateral Aid. Humanitarian Assistance. Is military aid foreign aid? The majority of aid to these particular countries is military aid. US foreign aid is financed […]
What is the example of standardized test?
What is the example of standardized test? Once known as the Scholastic Aptitude Test, the SAT is one of the most well-known and commonly administered standardized tests in the United States. Most high school juniors and seniors take the SAT or the PSAT (Preliminary SAT), as it is a common requirement for admission to college. […]
What causes gene mutation?
What causes gene mutation? A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. What is the gene mutation? A gene mutation (myoo-TAY-shun) is a change in one or more genes. Some […]
Which religious denomination have the most US presidents belong to?
Which religious denomination have the most US presidents belong to? Protestants predominate, with Episcopalians and Presbyterians being the most prevalent. John F. Kennedy was the first Catholic president and Joe Biden, the current president, is the second. There have been at least four nontrinitarian presidents. What is the role of religion in Lincoln’s understanding of […]
What were the advantages of the use of mechanical harvesting machines in USA?
What were the advantages of the use of mechanical harvesting machines in USA? The advantages of the use of mechanical harvesting machines in the USA were: The price of wheat was high and demand limitless. These new machines allowed farmers to quickly clear tracts, break up the soil, remove the grass and prepare the ground […]
Which are examples of how technology has advanced scientific understanding?
Which are examples of how technology has advanced scientific understanding? Science and technology help each other advance. Scientific knowledge is used to create new technologies. New technologies often allow scientists to explore nature in different ways and make new discoveries. Examples of technologies that have helped science advance include the telescope and microscope. Which of […]
What type of soil is best for growing plants?
What type of soil is best for growing plants? loam What substances help plants grow? Plants need large amounts of three nutrients: nitrogen, phosphorous, and potassium. Combine those with water and sunlight and plants will grow. In a natural ecosystem, nutrients are naturally cycled. Plants grow, using these substances, then they die. Which part of […]
At which type of plate boundary do tectonic plates slide past each other?
At which type of plate boundary do tectonic plates slide past each other? transform plate boundary What are the types of convergent boundaries? When two tectonic plates move toward each other and collide, they form a convergent plate boundary. There are three types of convergent plate boundaries: oceanic-oceanic boundaries, oceanic-continental boundaries, and continental-continental boundaries. What […]