Asking About Life
Life Scientists study things that were once living, diseases that are not inherited by humans, and __________.
Environmental Problems
add; divide
An explanation that matches many hypotheses but may still change
Compound Light Microscope
Scientific Methods
Life scientists work
The steps of scientific methods are _____ _______ used in the same order.
Not Always
A limitation of scientific models
Life scientists use kilograms when measuring an object's ____
Mass
An explanation that is based on prior scientific research or observations and that can be tested
Hypothesis
Life scientists study
A control group and one or more experimental groups that differ by the variable
Essential parts of a controlled experiment
The three types of scientific models
Physical, Mathematical, & Conceptual
A microscope that that focuses a beam of electrons to magnify objects
Electron Microscope
Controlled Experiment
Scientific investigations usually start with a question
Observation limits what scientists can study by ______
Tells you exactly what to expect in certain situations
Law
The measure of the surface of an object
Area
A factor that changes in an experiment in order to test a hypothesis
Variable
To determine a percentage, one must take the selected amount and _____ by the _____ amount.
divide; total
Scientific knowledge ________ because scientists conduct new experiments to test new hypotheses, then share their results and building upon new knowledge.
Changes
Scientific knowledge is built as scientists ____ and ____ hypotheses, models, theories, & laws.
SI units are almost always based on
the number 10
The ____ of a liquid is usually described in liters.
Volume