Lab Safety
Properties of Matter
Calculating density, mass, and volume
Scientific Method
Percent Error
100

Can you eat or drink in the lab?

No

100

A ____ has a definite shape

Solid

100

What is the equation for density?

D=m/v

100

What is a hypothesis?

An educated guess

100

What is the equation for percent error?

% error=accepted value-experimental value /accepted value

200

If glass breaks in the lab, what should you do?

Tell the teacher

200

At what temperature does water boil?

100°C/212°F

200

What is the equation for volume 

V=m/d

200

The Method of gathering information by using your senses is called a _____

Observation

200

An object has a mass of 35.0 grams. On Anthony’s balance, it weighs 34.85 grams. What is the percent error of his balance?

0.43%

300

Can you wear dangling jewelry in the lab?

No

300

Temperature where a solid turns into a liquid is what?

Melting point

300

What is the equation for mass?

M=DxV

300

What is a control in an experiment?

Anything that does not change

300

Lucas estimated the weight of his pet rabbit, Blu, to be 5.55 pounds. Blu’s actual weight is 4.75 pounds. Find the percent error.

15.8%

400

What kind of shoes do you wear in the lab?

Closed toed shoes

400

True/False

Mass is the measure of how much matter an object has

True


400

A cricket ball has a density of 0.8 g/cm3 and a mass of 165 grams. Find the volume of the cricket ball

V=206.25

400

Does the independent variable change in an experiment?

No.

400

A student measures that a piece of string is 2.6 cm, but the actual length of the string is 2.9 cm. What is the student's percent error?

10.3%

500

Why do you wear goggles in the lab?

To protect your eyes from harmful chemicals 

500

Rusting is a _____ change

Chemical

500

A piece of carbon has a density of 2.2 g/cm3 and a volume of 70 cm3. Find the mass of the piece of carbon

M=154

500

Name the steps of the scientific method

Question, Research, Hypothesis, Experiment, Data Analysis, and Conclusion

500

A reaction between one mole of sodium and one mole of chloride should yield 42 grams of sodium chloride. In your experiment, the actual yield is 32.73 grams. Calculate the percent error of your experiment.

22.07%

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