In which step of the scientific method do we want to use graphs A make a hypothesis B communicate results C asking questions D analyze data. Which of the following is important when creating a graph in science. A all of these B neatness C titles D labels. A scientist who wants to study the affects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B gets 5 mg.
Which plant is the control group. A series of steps followed to solve problems is A the scientific method B standard procedures C investigations D experimental guidelines. The best graph to use if I want to compare the price of six different cars would be a A pie graph B data table C line graph D bar graph.
Why is it important to conduct scientific tests more than one time? Students who took this test also took : Paws vocabulary 7th grade Scientific method bellringer Microscope safety. A making observations B interpreting data C making a hypothesis D drawing conclusions 2. D it should restate the question 5. A a dependent variable B a controlled experiment C a theory D an independent variable 6. A series of steps designed to help you solve problems and answer questions A scientific method B observation C hypothesis D experiment 9.
In an experiment, the one variable that is changed is called the A independent variable B dependent variable C controlled variable D experimental variable In an experiment, the factor that we measure is called the A independent variable B controlled variable C conclusion D dependent variable The independent variable is A the temperature B the gender of the alligator C the incubator D the male alligators The dependent variable is A the temperature B the size of the baby alligators C the incubator D the gender of the baby alligators In this experiment the independent variable is A the temperature of the water B the number of plants in the water C the amount of salt in the water D the water In this experiment the dependent variable is A the water B the temperature of the water C the number of plants in the water D the amount of salt in the water All the things in an experiment that must be the same to make it fair are called A controlled variables or constants B dependent variables C independent variables D controlled experiments Fossil collecting opportunities vary around the world, and it is very important to always get permission from landowners and follow local, state, and federal laws.
That way you know that if you follow the guidelines, your collecting will be fun and interesting for you, and helpful rather than potentially harmful to the field of paleontology. Another thing you can do is read a book on fossil collecting guidelines. How can you tell if something is a fossil? Paleontologists recognize fossils based on their shape, their structure, and sometimes the material they are made of. Since fossils are the remains of ancient life, paleontologists study the shape, structure, and materials of living things today.
This helps paleontologists recognize fossils that are the remains of living things from tens of thousands to millions of years old. How do we know how old a fossil is? Fossils are usually preserved in sedimentary rocks, which are usually found in layers. These layers form when sediment clay, silt, sand, etc. The layers form when sediment is deposited in the same place time and time again. If you think about how that works, the layers on the bottom must be the oldest because they had to be there for the next layer to be laid down on top, right?
This principle, that the oldest layers of rock are on the bottom, called superposition, is a pretty powerful tool for telling relative time. With it, paleontologists can tell which fossil organisms lived and died before others. Paleontologists can put numerical dates on their relative time scale by using a method called radiometric dating. The basic idea is that rocks that cool from a molten state contain naturally-occurring radioactive elements that break down into other stable materials daughter products at known rates.
This is known as radioactive decay. Once this rate is known, geologists can calculate the length of time over which decay has been occurring by measuring the amount of radioactive parent element and the amount of stable daughter products.
The trick is that this method is usually only used on rocks that were molten, and these cooled rocks don't usually contain fossils.
We can use this method when lavas and ash fall deposits form between layers of sedimentary rock that contain fossils. If we can put dates on the datable deposits above and below a sedimentary layer containing fossils, we know our fossils must have been deposited between those two dates.
How do you identify fossils that you find? Vertebrate paleontologists spend a great deal of time studying the anatomy of living animals so that they can compare the bones and teeth of living animals to those of fossil animals.
We also compare the bones and teeth of newly discovered fossils to those that have been discovered before. If they are very similar to animals that have been described before, we figure that they are new finds of the same animal. If they are different, and we are sure we have compared them to all of the other fossils and recent animals, we can name a new species for the new fossil.
The real process of science is complex, iterative, and can take many different paths. Explore the unpredictability of the process of science and find out how an investigation of plate tectonics led researchers in a surprising direction. Check out Asteroids and dinosaurs. Use our web interactive to help students document and reflect on the process of science. Learn strategies for building lessons and activities around the Science Flowchart: Grades Grades Grades Grades Find lesson plans for introducing the Science Flowchart to your students in: Grades Grades Grades Get graphics and pdfs of the Science Flowchart to use in your classroom.
Translations are available in Spanish, French, Japanese, and Swahili. High school and college level students can experience many aspects of the process of science with a simple, take-home assignment like this one in which they make note of an observation, ask a relevant question, and make observations to help them answer that question. Introduce the flowchart to your class with a short video. Videos about a study of spiders and a study of climate change are available.
How science works. A blueprint for scientific investigations.
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