# Directions: Choose the Best Answer for the Following Questions

## IPS Name______

Chapter 2 Test

Directions: Choose the best answer for the following questions.

## Section 1: Scientific Method

_____1. A possible explanation for a set of observations is called a(n) ______.

1. variable
2. hypothesis
3. independent variable
4. dependent variable

_____2. A factor that affects the outcome of an experiment is called a(n)_____.

1. variable
2. hypothesis
3. observation
4. prediction

_____3. A bar graph is used to ______data.

1. observe
2. organize
3. analyze
4. all the above

____4.The detergent in Grandma Wright’s Soap Dilemma was considered as the ______during the testing.

1. control group
2. independent variable
3. dependent variable
4. conclusion

_____5. In Grandma Wrights Soap Dilemma, the dependent variable was ______.

1. different detergents
2. type of stain used
3. the volume of detergent used
4. how much of the stain was removed

_____6. In the experimental situation, the group that contains everything accept the variable being tested.

1. experimental group
2. control group
3. research group
4. observation group

_____7. The class period when everybody went back to the labs to read the packets of information about each soap represents the ______step of the scientific method.

1. analysis
2. data collection
3. researching
4. conclusion

_____8. The material that was washed in plain water with no detergent represents the ______for the clothes soap experiment.

1. independent variable
2. experimental group
3. control group
4. dependent variable

_____9. The dependent variable is the ______of the experiment.

1. hypothesis
2. research
3. outcome
4. beginning

_____10. A scientist begins working by trying to explain a natural occurrence that is _____.

1. undetectable
2. observable
3. unstable
4. stable

Questions: Use the scenario below to answer questions 11-15.

Scenario: Suppose you notice an area in your front lawn where the grass is not growing correctly. The rest of your lawn has thick, green grass, but this one area has very sparse grass.What makes that area different from the areas where the lawn is growing nicely? Does one area get more or less sun? What is the soil like? You compared as many likely factors that you can think of. The sparse area is surrounded by several evergreen trees, which drop needles and block much of the sunlight. The soil appears just as rich as the soil in other areas, but the pH is lower. All areas seem to be getting similar amounts of water. The temperature in the shaded area is lower than the areas that are not shaded. You predict that if the pH of the soil were higher, then my grass would grow properly. You decided to test your prediction.You took 200 small pots and used them to grow 200 samples of grass. You split the 200 pots into 5 groups of 40, and you adjusted the pH of the soil with calcium oxide (lime) until the five groups had pH readings of; 3,5,7,9, and 11 respectively. In all of the samples I used the same amount and type of soil and the same type and number of grass seeds. Each sample was kept in the same room with identical conditions as far as light, temperature and water. You took what you found and graphed the grass height versus the ph level on a line graph. You found that higher ph grew the higher grass.

_____11. What is your hypothesis in this scenario?

1. The temperature in the shaded area is lower than the areas that are not shaded.
2. Each sample was kept in the same room with identical conditions as far as light, temperature and water
3. You predict that if the pH of the soil were higher, then my grass would grow properly
4. Does one area get more or less sun?

_____12. What was your dependent variable?

1. grass seeds
2. grass height
3. Ph
4. water

_____13. What was your independent variable?

1. Ph
2. Grass height
3. Water
4. Soil

_____14. How the data analyzed?

1. pie chart
2. bar graph
3. circle graph
4. line graph

_____15. Was there a control group made?

1. Yes
2. No

Section II: Measuring

_____16. What is the length of the following line? ______

1. 7.5 cm
2. 5.5 cm
3. 8.3 cm
4. 12.0 cm

Use the following rectangle to answer 17 and 18.

_____17. What is the length of the square?

1. 2.3 cm
2. 5.6 cm
3. 3.2 cm
4. 8.9 cm

_____18. What is the width of the square?

1. 5.6 cm
2. 3.5 cm
3. 4.7 cm
4. 2.1 cm

_____19. What is the volume of an aluminum cube whose edges are 10 cm long?

1. 10 cm3
2. 200 cm3
3. 30 cm3
4. 1000 cm3

_____20. What is the mass of the aluminum cube? (one cubic centimeter of aluminum has a mass of 2.7 grams)

1. 2.7 grams
2. 270 grams
3. 2700 grams
4. 12 grams

_____21. A good definition of volume is ______.

1. amount of matter in an object
2. the weight of object
3. the amount space an object takes up.
4. The gravitation pull on an object.

_____22. A good definition of mass is ______.

1. amount of matter in an object
2. the weight of object
3. the amount space an object takes up.
4. The gravitation pull on an object.

### Section III: Metric System

_____27. Centi represents ______of the basic unit in the metric system.

1. 100 units
2. 10 units
3. 0.1
4. 0.01

_____28. When converting to smaller units you must move the decimal place to the _____.

1. right
2. left

_____29. When converting to larger units you must ______.

1. multiply
2. divide

_____30. Deka represents ______of the basic unit.

1. 1000 units
2. 10 units
3. 0.001 units
4. 0.1 units

_____31. The metric system is based on ______.

1. 10
2. 100
3. .1
4. 10000

_____32. Milli- represents ______of the basic unit.

1. 10
2. 0.1
3. 0.001
4. 0.01

_____33. Deci- represents______of the basic unit.

1. 10
2. 0.1
3. 0.001
4. 0.0001

In questions 36-40, convert following to the appropriate units.

_____34. 567 mm =______cm

1. .567
2. 5.67
3. 56.7
4. 0.0567

_____35. 9.03 km=______m

1. 0.903
2. 90.3
3. 903
4. 9030

_____36. 8.90 ml=______kiloliter

1. 89000
2. .000890
3. .00000890
4. .0000890

_____37. 7.58 grams= ______Decigram

1. 75.8
2. 758
3. 0.00758
4. 0.758

_____38. 456 grams=______Dekagram

1. 0.456
2. 4.56
3. 45.6
4. 0.00456

_____39.

We have a new guest in our house. He is 0.54 meters long and weighs 4.1 kg. He is our new baby brother! The doctor said the baby should gain about one hundred thirty-six grams per week. At that rate, how much in kilograms will he weigh in 3 months (12 weeks)?
1. 5.0 kg
2. 4.5 kg
3. 5.7 kg
4. 4.1 kg

____40.The boundary between our farm and the farm to the north is 4.3 km. The boundary between our farm and the farm to the south is two hundred thirty-three meters. How much longer, in kilometers, is the boundary with the farm to the north than the boundary with the farm to the south?

1. 4.067 km
2. 2.879 km
3. 6.789 km
4. 1.289 km

_____41. Convert a density of 13.6 g/s to its equivalent in lb/hr.

1. 14.6
2. 478.3
3. 108.0
4. 123.0

_____42. Convert 2.5 kg per second to pounds per hour.

1. 25,908
2. 56,456
3. 12,258
4. 19,845

Section IV: Use the graph below.

_____43. How many millions people switched from MCI to AT&T in 1995?

1. 2 million
2. 3 million
3. 5 million
4. 6 million

_____44. What year below would I need to extrapolate to find the amount the people who switched to AT&T.

1. 1994
2. 1995
3. 1997
##### D.1996

Section V: Use the diagram below.

_____45. What is the volume of the toy dinosaur?

1. 1.0 ml
2. 0.8 ml
3. 0.6 ml
4. 0.9 ml

Scenario: Mr. Wright’s IPS classes were given an experiment to perform. The title of the experiment was “Santa is the Man”. The purpose of the experiment was to calculate the total distance that Santa Clause traveled on Christmas Night. The classes went to the North Pole and gave Santa Clause a GPS to track his sleigh route. The students found that the North Pole was very cold and dark because a winter in the North Pole has 24 hours of darkness. The classes collected the distance traveled by Santa Clause every hour by use of the GPS. In the end, the students measured that Santa traveled 24,853.6 miles in 24 hours. Santa was also very happy because the students gave him a year supply of milk and cookies for helping them with their experiment. Santa replied that the milk and cookies tasted good.

_____46. What sentence below can be best explained as a qualitative observation?

1. The purpose of the experiment was to calculate the total distance that Santa Clause traveled on Christmas Night.
2. In the end, the students measured that Santa traveled 24,853.6 miles in 24 hours.
3. The classes collected the distance traveled by Santa Clause every hour by use of the GPS.
4. The students found that the North Pole was very cold and dark because a winter in the North Pole has 24 hours of darkness.

_____47. What sentence below can best be explained as a quantitative observation?

1. The purpose of the experiment was to calculate the total distance that Santa Clause traveled on Christmas Night.
2. In the end, the students measured that Santa traveled 24,853.6 miles in 24 hours.
3. Santa replied that the milk and cookies tasted good.
4. The students found that the North Pole was very cold and dark because a winter in the North Pole has 24 hours of darkness.

_____48. What sentence below can be best explained as a qualitative observation?

1. The classes went to the North Pole and gave Santa Clause a GPS to track his sleigh route.
2. Santa replied that the milk and cookies tasted good.
3. Santa was also very happy because the students gave him a year supply of milk and cookies for helping them with their experiment.
4. Mr. Wright’s IPS classes were given an experiment to perform. The title of the experiment was “Santa is the Man”.

Section V: Volume by formula: Find the volume for the object below.

_____49. The volume of the object above is______.

1. 245.6 cm3
2. 3,011.4 cm3
3. 1,458.9 cm3
4. 2478.9 cm3