Q: Q: The magnet field of earth is called what? Read this paragraph and choose the correct option from the provided answers: Earth is a giant magnet with north and south magnetic poles and a magnetic field called the magnetosphere. Evidence in rocks shows that Earth's magnetic poles switched positions hundreds of times in the past. Scientists think that Earth's magnetic field is caused by the movement of charged particles through molten metals in the outer core. Choices: - atmosphere - troposphere - ionosphere - magnetosphere A:
A: magnetosphere

Q: Q: What is the process in which unstable nuclei become stable by emitting particles and energy and changing to different elements called? Read this paragraph and choose the correct option from the provided answers: Radioactive decay is the process in which unstable nuclei become stable by emitting particles and energy and changing to different elements. There are three types of radioactive decay: alpha, beta, and gamma decay. Each differs in what is emitted, how far it can travel, and what it can penetrate. Choices: - nuclear decay - radioactive decrease - initial decay - radioactive decay A:
A: radioactive decay

Q: Q: What does it mean to be a diploid organism? Read this paragraph and choose the correct option from the provided answers: Early land plants also evolved a dominant sporophyte generation. Sporophytes are diploid, so they have two copies of each gene. This gives them a "back-up" copy in case of mutation. This was important for coping with the strong solar radiation and higher risk of mutations on land. Choices: - yolk has two copies of each gene - taproot has two copies of each gene - micelles have two copies of each gene - organism has two copies of each gene A:
A: organism has two copies of each gene

Q: Q: What is the name of the smallest planet in our solar system, which is also nearest to the sun? Read this paragraph and choose the correct option from the provided answers: Mercury is the smallest planet. It has no moon. It is also the planet closest to the Sun. Pictured below is the surface of Mercury covered with craters ( Figure below ), like Earth's Moon. Many of the impact craters are billions of years old. This means that Mercury hasn't changed much geologically for billions of years. It has no plate tectonics. With only a trace of an atmosphere, it has no weather to wear down the ancient craters. Choices: - mars - jupitor - earth - mercury A:
A: mercury