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Physical/Chemical Changes
Acids/Bases
Density
Law of Conservation of Mass
Scientific Inquiry
100
Marshall adds a small amount of sugar to a cup of warm water. The sugar disappears after a short time. What happened to the sugar? What type of change is this?
What is physical change? The sugar dissolved.
100
Red litmus paper turns blue and blue litmus paper stays blue in a solution. The solution is most likely what?
What is a base
100
What is the density of a cube if it has a mass of 2grams and a volume of 1 cubic centimeter?
What is 2g/cm3
100
Which of the following is the correct skeleton equation for the following word equation? Gaseous hydrogen combines with gaseous chlorine to yield hydrogen chloride gas. a. HCl --> H + Cl b. HCl(g) --> H(g) + Cl(g) c. H(g) + Cl(g) --> HCl(g) d. H + Cl --> HCl
What is c.
100
Pie graphs must add up to what percent?
What is 100
200
What two substances react together to form rust?
What is iron and oxygen?
200
What is the best method for a student to identify a solution as an acid or a base?
What is use litmus paper?
200
Using the density equation below, calculate the mass of a 15mL (volume) sample of mercury with a density of 3g/mL? d=m/v
What is 45g/mL
200
A chemical equation is shown below. The element Hydrogen (H) can be best described as 2Zn + 2HCl --> 2ZnCl + H2 + heat
What is a product?
200
If you are looking at data showing a trend over time, what type of graph would you use?
What is a line graph?
300
What are the elements that are combined to make salt? Give their names, chemical symbol, and the equation.
What is sodium and chlorine, Na + Cl --> NaCl?
300
Another name for a base is?
What is alkaline?
300
A block of pine wood has a mass of 30 grams and a volume of 12 cubic centimeters. What is the density of the wood?
What is 2.5g/cm3
300
Which chemical equation best represents the law of conservation of mass? a. Zn + HCl --> ZnCl2 + H2 b. CH4 + 2O2 --> CO2 + 2H2O c. Al4C3 + 3H2O --> CH4 + 4Al(OH)3 d. 2H20 --> H2 + O2
What is b.
300
Which graph would you use to display the following data? To compare the pH of three different fruits
What is a bar graph?
400
What are the four outcomes of all chemical reactions?
What is new bonds, new properties, new substance, new composition
400
A teacher gives the class two unknown red-colored solutions and one red-colored control solution that is an acid. A student concludes that since both unknown solutions are red colored, those solutions must also be acidic. What could have led to an error in the student’s process that led to this wrong conclusion?
What is the students did not measure the pH of the solution?
400
A man has a 50.0 cm3 bottle completely filled with 163 g of a slimy green liquid. What is the density of the liquid?
What is 3.26g/cm3
400
What number should go in place of the question mark to balance the following equation? 4Fe + 3O2 --> ?Fe2O3
What is 2?
400
The group that does not receive the independent variable is called what?
What is the control group
500
Give four specific examples of physical changes and four specific examples of chemical changes.
What is ......
500
What are two types of indicators used to determine the pH of a substance?
What is phenolpthalein (chemical indicators), pH meter, pH paper, etc.?
500
Find the density of a rock that has a mass of 10g and a volume of 12g.
What is 0.83333?
500
Read the equation. 2Ca + O2 --> 2CaO What can the product of this reaction be classified as? (mixture, element, etc.)
What is a compound?
500
A farmer wants to know how a new fertilizer affects the growth of plants. List the independent, dependent, and two controls variable for this experiment.
What is ......