A _______ is an educated guess about the outcome of an experiment.
Scientists think the earth was formed_____________ years ago
4.6 billion
Things that are purposely kept the same throughout an experiment are called
Constant
Which layer of the Earth is Rocky and surrounded the Earth like a shell or skin
Crust
Name the three layers of the Earth according to the diagram below
Crust,mantle,outer core, inner core
A factor in an experiment that changes as a result of the independent variable is called the
Dependent variable
The preserved remains or imprints of animals plants and other organisms from the distant past are called
Fossils
A_________ is an educated guess about the outcome of an experiment
Hypothesis
A variable in an that is purposely Changed by the experimenter is called an
Independent variable
When you explain or make sense of your observations you are making an
Inference
Which layer of the Earth is the thickest
Mantle
Something You observe with your own eyes is called an
Observation
Which layer of the earth is made melted iron and nickel
Outer core
The steps scientists use to figure out why things happen the way they do is called an
Scientific method