For which of the following would the kilometer be the most appropriate unit of measure?
Which of the following would you measure using a balance?
Which of the following would you measure using a graduated cylinder?
You measure the length of a string three times and get values of 34.0 cm,
34.1 cm, and 34.2 cm. The actual length is 39.0 cm. What can you say about your measurements?
If a shoe box measures 6 cm high, 7 cm wide, and 20 cm long, what is its volume?
Scientists have developed models for the structure of atoms because
A(n) significant figure is an approximation of a number based on reasonable assumptions.
Scientists often rely on estimates when they cannot obtain exact numbers.
Percent error calculations are data that do not fit with the rest of a data set.
Accuracy refers to how close a group of measurements are to each other.
A bar graph can be used to display only numerical data.
A graph in which the data points do not form a straight line is a(n) linear
Line graphs display data that show how one variable changes in response to another variable.
Feedback is a type of input.
Output is what happens in a system.
A complex or simple system can be represented in a model.
A model can show your body’s digestive system.
Scientists can use models to predict stability in a system as a result of a change in output or systems feedback.
When you are doing an investigation with glass beakers, there will always be a safety symbol for heating.
Use plastic gloves when handling hot objects.
Wear safety goggles when you are working with chemicals or sharp objects.
When you handle animals, use plastic gloves.
A(n) fire blanket smothers fires.
A graph is a picture of
compare information
In experiments, scientists make changes to one variable, called the
Both linear graphs and
A reliable measurement is both
Temperature and time are examples of
In experiments, scientists make changes to the independent variable, and the data
they collect show what happened to the
these changes.
The
If certain data are not
The
Scientists use models to understand things that they cannot observe
The tick’s life cycle can be shown in a
A system produces a result or
A complex system involves
What should you always do to be safe in the field?
Which of the following rules is important to follow when you are working with chemicals?
What is the first thing you should do in case of a fire in the laboratory?