Q: Q: What is the set of steps that scientists use to learn about the world? Read this paragraph and choose the correct option from the provided answers: Sometime in your life you've asked a question about the world around you. Probably you've asked a lot of questions over the years. The best way to answer questions about the natural world is by using science. Scientists ask questions every day, and then use a set of steps to answer those questions. The steps are known as the scientific method. By following the scientific method, scientists come up with the best information about the natural world. As a scientist, you need to do experiments to find out about the world. You also need to wonder, observe, talk, and think. Everything we learn helps us to ask new and better questions. Choices: - philosophic method - rhythm method - Socratic method - scientific method A:
A: scientific method

Q: Q: What determines the length and thickness of dna chromosomes? Read this paragraph and choose the correct option from the provided answers: The degree of DNA coiling determines whether the chromosome strands are short and thick or long and thin. Between cell divisions, the DNA in chromosomes is more loosely coiled and forms long thin strands called chromatin . DNA is in this uncoiled form during the majority of the cell cycle, making the DNA available to the proteins involved in DNA replication and transcription. Before the cell divides, the chromatin coils up more tightly and form chromosomes. Only chromosomes stain clearly enough to be seen under a microscope. The word chromosome comes from the Greek word chroma (color), and soma (body) due to its ability to be stained strongly by dyes. Choices: - degree of rna coiling - type of dna - number of chromosomes - degree of dna coiling A:
A: degree of dna coiling

Q: Q: What is another word for thermal energy? Read this paragraph and choose the correct option from the provided answers: Choices: - solar - humidity - temperature - heat A:
A: heat

Q: Q: The ability of matter to combine chemically with other substances is known as? Read this paragraph and choose the correct option from the provided answers: Reactivity is the ability of matter to combine chemically with other substances. Some kinds of matter are extremely reactive; others are extremely unreactive. For example, potassium is very reactive, even with water. When a pea-sized piece of potassium is added to a small amount of water, it reacts explosively. You can observe this reaction in the video at the URL below. ( Caution: Don't try this at home!) In contrast, noble gases such as helium almost never react with any other substances. Choices: - turbidity - solubility - permeability - reactivity A:
A: reactivity