Unit 1 Test Study Guide
Directions: Answer the following on this or another sheet of paper. While this worksheet does not review every topic that will be covered on the Unit 1 Test (You also should use/study the Quiz Study Guide that has the introductory topics), it does present the essential math components you should master for success.
Scientific Notation
Convert to scientific notation or standard form. Keep the number of significant figures the same as the given number.
1.3,456,320______2.4.563 x 10-4______
3.0.0004322______4.3.40 x 101______
5.102.0______6.7.8322 x 100______
Solve the following problems in scientific notation – show all work and round appropriately!
7.8.40x108 x 7.2x10-3______8.7.8x10-4 ÷ 4.51x103______
9.4.50x103 + 7.5x10-2______10.3.3x108–9.72x107______
Significant Figures
Indicate the number of significant figures, and then round each to the number of significant figures specified.
Ex.1.234has 4 significant figures and, rounded to 2 significant figures, is 1.2
11.0.089has ______significant figures and, rounded to 1 significant figure, is ______
12.10,700has ______significant figures and, rounded to 2 significant figures, is______
13.12,700.00has ______significant figures and, rounded to 1 significant figure, is ______
14.0.0009880has ______significant figures and, rounded to 2 significant figures, is ______
Rounding
Report the unrounded answer in the first blank, and then round the final answer correctly in the second blank.
Unrounded Answer Rounded (Final) Answer
Ex. 134.8 + 27.67 = 162.47 162.5
15. 206.5 + 4.002 = ______
16. 6.341 + 102.0 = ______
17. 8.001 – 6.7 = ______
18. 3696.10 – 34.0010 =______
19.1.41 x 22.10 = ______
20.3696.10 x 4.0010 =______
21.0.68 x 2.45 5.912 =______
22.2.1 x 354.98 4.775 =______
23.0.03325 x 1.99992 = ______
Measurements & Estimation
Use the thermometer scale (in C) shown at right to answer the following questions.
24. The thermometer at right reads to which decimal place? ______
25.All measurements should be estimated to which decimal place? ______
26.Estimate the temperature indicated on the thermometer at right. ______
Dimensional Analysis Unit Conversions
Use dimensional analysis to convert the following. Show all work, units, and round your answer correctly.
27.340 µg = ______pg33.7250 mm = ______cm
28.98 cm = ______in34. 9700 nL = ______µL
29.93 oz. = ______g35. 0.3001 m = ______km
30. 176 mg = ______ng36. 25 mg =______cg
31.20 m = ______in.37. 1,560 m = ______mi
32.450 m/s =______mi/hr38.5.70 g/mL =______µg/L
Mark each set of numbers as having a high or low accuracy and precision.
AccuracyPrecision
High Low High Low
Ex: Object measured is 1.0 meter long
1.151.12
1.101.30 ______
39) Object measured is 50 cm length
5248
6041 ______
40) Object measured is 27 mL volume
27.521.8
33.022.8 ______
41) Object measured is 15 cm2 area
13.2113.19
13.2513.22 ______
42) What is the difference between a data table and a graph? What are the “rules” for creating a data table? What are
the five main parts of a graph?
43)A precipitation reaction occurs when you mix solutions of silver and bromide. A scientist wants to see the effect of adding extra silver to the equation. On Tuesday she adds different concentrations of silver solution to a 1.0 M bromide solution and finds the mass of precipitate formed. When she adds 15 g/mL of silver, 24 grams of precipitate are formed. When she adds 25 g/mL of silver, 38 grams of precipitate are formed. When she adds 40 g/mL of silver, 50 grams of precipitate are formed. When she adds 50 g/mL of silver, 61 grams of precipitate are formed.
- Create a table data for this information. – include all components!
- Create a scatterplot graph for this information. – include all components!
44)True (T) or False (F)
1 / Changing the size and shape of pieces of wood would be a chemical change.2 / In a physical change, the makeup of matter is changed.
3 / Evaporation occurs when liquid water changes into a gas.
4 / Evaporation is a physical change.
5 / Burning wood is a physical change.
6 / Combining hydrogen and oxygen to make water is a physical change.
7 / Breaking up concrete is a physical change.
8 / Sand being washed out to sea from the beach is a chemical change.
9 / When ice cream melts, a chemical change occurs.
10 / Acid rain damaging a marble statue is a physical change.
45)Identify the following statements as physical or chemical properties of matter.
a.Iron reacts with oxygen to form rustf. Oxygen is a gas
b.The boiling point of water is 100 °Cg. Argon is not very reactive
c.Baking soda reacts with vinegarh. Nickel has 4 isotopes
d.The metal had a melting point of 95°Ci. Nitrogen is a colorless gas
e.The gas is flammablej. The silver spoons will tarnish and turn dark
46)Readeach scenario. Decide whether a physical or chemical change has occurred and give evidence for your decision. The first one has been done for you as an example
Scenario / Physical or Chemical Change? / Evidence…1 / Yumm! A student removes a loaf of bread hot from the oven. The student cuts a slice off of the loaf and spreads butter on it. / Physical / No change in substance
No unexpected color/temp change or gas given off.
2 / Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen is full of smoke.
3 / You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it.
4 / You blow dry your wet hair.
5 / In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. The carbon dioxide bubbles cause the dough to rise.
6 / You take out your best silver spoons and notice that they are very dull and have some black spots.
7 / A straight piece of wire is coiled to form a spring.
8 / Food color is dropped into water to give it color.
9 / Chewing food to break it down into smaller particles is a __ change, but the changing of starch into sugars by enzymes in the digestive system represents a __ change.
10 / During the show, fireworks explode giving off heat and light.
47)Identify the following statements as physical (intensive/extensive) or chemical properties of matter. (To earn a 10 on standard 1.6)
- Iron reacts with oxygen to form rustf. Oxygen is a gas
- The boiling point of water is 100 °Cg. Argon is not very reactive
- Baking soda reacts with vinegarh. Nickel has 4 isotopes
- The metal had a melting point of 95°Ci. Nitrogen is a colorless gas
- The gas is flammablej. The silver spoons will tarnish and turn dark
48)Review your Measurements & Doubt Worksheet to make sure you know how to make measurements using the tools!
49)Review your quiz!!