Chemical or Physical
Experiments
Properties of Matter
Density
Unit 1 Misc.
100

Is a melting popsicle a chemical or physical change? 

Physical Change 

100

During our bath bomb experiments, the gas produced did not extinguish the flame. True or False

False 

100

Which is denser Helium (He) or Nitrogen (N)?

Nitrogen

100

What is the formula for density?

D=M/V

100


Which unit would you use for the weight of an elephant?

Kilograms

200

Is burning wood a chemical or physical change?

Chemical Change 

200

A boiling pot of water with its lid off is an example of what type of system? 

Open System

200

What is the flammability of Methane?

Increase a flame 

200

You have a rock with a volume of 15 cm3 and a mass of 45 g. What is its density?

3 g/cm3

200

Draw an example of a closed system

First and best wins 

300

Is digesting food a chemical or physical change? 

Chemical Change

300

A metal thermos full of coffee with a lid on a bench at a hockey game is an example of what type of system?

Closed System 
300

Which gas makes up the largest percentage of air? 

Nitrogen

300

Solve for density of an unknown substance 

Mass = 200 grams

Volume = 25 cm3

8 g/cm3

300

Which unit would you use to measure the volume of a liquid in a teaspoon of vanilla? 

Milliliters (mL)

400

Is a nail rusting a chemical or physical change? 

chemical change 

400

We placed the bath bomb ingredients into a test tube and placed the ingredients inside the soda bottle. Then we caused the reaction and weighed the bottle closed and open. 

In that experiment, we learned that?  

That the gas is not a new matter 

400

Which gas has the lowest boiling point? 

Helium (He)

400

A golden-colored cube is handed to you. The person wants you to buy it for $100, saying that is a gold nugget. You pull out your old geology text and look up gold in the mineral table, and read that its density is 19.3 g/cm3. You measure the cube and find that it is 2 cm on each side, and weighs 40 g. What is its density? Is it gold? Should you buy it?

5.0 g/cm3, No, and No.

400

What is the difference between a qualitative and a quantitative observation? 

Qualitative describes the quality of an object such as color or scent.  

Quantitative describes a quantity such as mass of an object of the height of an object expressed as a number. 

500

Dissolving sugar and Kool-Aid mix into water is an example of chemical or physical change. 

Physical Change 

500

The fact that NaHCO3 +  C₆H₈O₇ + H2O make CO2 and not Argon or Nitrogen gas is an example of which law of science?

The Law of Conservation of Mass 

500

Carbon dioxide is ________ than air and will _________ a flame. 

denser, extinguish 

500

You decide you want to carry a boulder home from the beach. It is 30 centimeters on each side, and so has a volume of 27,000 cm3. It is made of granite, which has a typical density of 2.8 g/cm3. How much will this boulder weigh?

1 pound = 453.6 grams 

The result is that the mass is 75,600 grams. That is over 165 pounds.

500

List out and write the definitions of Control, Dependent, and Independent variables. 

Control - do not change

Dependent - responds to change

Independent - the one you do change 

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