Unit 1 Science Skills. Practice Test

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1 Unit 1 Science Skills Practice Test

2 Betty woke up early one Saturday morning to head to her favorite activity basketball! She had an 8:00 AM game, and she didn t want to be late. In fact, she packed all of her gear into the car the night before. She scraped the frost off of the windows then drove to the court. Inside, she took out her basketball and started to dribble. It thudded on the floor and would barely bounce. What the heck?! Scenario

3 Question 1 What type of observation did Betty make about the basketball? A. quick observation B. qualitative observation C. questioning observation D. quantitative observation

4 Betty swapped out basketballs, then finished the game. Her team won, but she couldn t stop thinking about that flat basketball. Scenario It was fine the night before, she even dribbled it on the driveway a bit before putting it in the car. She decided to check it out when she arrived home. To her surprise, when she was home, it bounced just fine on the driveway again!

5 Question 2 Noticing that the ball only bounced high some of the time is a(n). A. inference B. observation C. hypothesis D. claim E. theory

6 Betty thought that her ball must have a slow leak, but it was almost brand new. And why would it go back to bouncing once she arrived home? Was it the floor? Was it the leather? Was it the temperature? Scenario She decided to conduct an experiment. She asked the coach if she could borrow all of the team basketballs for the night. Betty was going to do a little test

7 Question 3 Which of these would be a proper question or problem statement for Betty s experiment? a. Will basketballs bounce after being left in a car overnight? b. Do basketballs bounce in the cold? c. Does cold affect rebound height? d. What are the effects of cold temperature on basketballs? e. What are the effects of cold temperature on basketball rebound height?

8 Betty marked each ball with a number then dropped each one from the same height and measured how high it bounced. Her best friend recorded a video so they could do slow-motion playback and use the black marks on the garage door to calculate the rebound height in inches. They dropped each ball 3 times and then used a calculator to compute an average bounce height for each ball. Scenario

9 Scenario Bounce Height in Inches Avg Here is the data the girls recorded at the start of the test.

10 Question 4 Bounce Height in Inches Avg Is there a significant difference in the bounce height between the 6 balls tested? Explain.

11 The girls decided that the balls had close enough rebound heights that they could use them for the test. Scenario That night, they placed 3 basketballs into Betty s car overnight, and left 3 balls in her bedroom overnight. It was forecasted to be below freezing again, just like it was when Betty s ball went flat.

12 Question 5 What was the hypothesis for this experiment? A. If a basketball is too old, then it will not rebound very well. B. If a basketball is too warm, then it will not rebound very well. C. If a basketball is too cold, then it will not rebound very well. D. If a basketball is too cheap, then it will not rebound very well.

13 Question 6 What was the independent variable for this experiment? A. temperature of the basketballs B. age of the basketballs C. size of the basketballs D. rebound height of the basketballs

14 Question 7 What was the dependent variable for this experiment? A. temperature of the basketballs B. age of the basketballs C. size of the basketballs D. rebound height of the basketballs

15 Question 8 The three basketballs stored overnight in the bedroom were the. A. controlled variables B. independent variables C. dependent variables D. control group

16 Question 9 Which of the following possible variables should be controlled for this experiment? Choose all which apply. A. Temperature of the basketballs B. Age of the basketballs C. Size of the basketballs D. Brand of the basketballs E. Rebound height of the basketballs F. Time of day to conduct test G. Location of testing

17 Scenario The next morning, the girls tested the basketballs again in the same spot next to the garage door.

18 Bounce Height in Inches Stored in Car Stored in Bedroom Avg Scenario Here is the data the girls recorded the next morning.

19 Question 10 Which variable should be placed on the vertical axis of a graph of this data? A. temperature B. time C. rebound height D. trial number

20 Question 11 Which type of graphic would be BEST for analyzing this data? A. Line graph B. Bar graph C. Pie chart D. Data table

21 Average Rebound Height Scenario Betty s graph looked like this s in Car s in Bedroom

22 Question 12 Which of these claims would be accurate, based on Betty s data? A. Basketballs do not bounce as high when they are cold as when they are warm. B. Basketballs do not bounce as high when they are small as when they are large. C. Basketballs do not bounce as high when they are old as when they are new. D. Basketballs do not bounce as high on concrete as on wood floors.

23 Question 13 Would this experiment be a fair test? A. Yes, because only the storage location was changed. B. Yes, because Betty compared two groups of basketballs. C. Yes, because each group had three basketballs. D. All of the above are correct

24 The results of this experiment inspired Betty to conduct another test, but this time she wondered if leather or synthetic covers on the basketballs made a difference in the rebound height. She read online that synthetic covers on basketballs have a thickness of 0.9 millimeters when measured with a micrometer.

25 Question 14 If the thickness is 0.9 millimeters, what would be the equivalent measurement in meters?

26 Question 15 When Betty used the Internet to determine the thickness of synthetic basketballs, what type of knowing did she use? A. Science B. Legend C. Culture / Media D. Personal Experience

27 Question 16 Using the photo below, categorize each statement as evidence or inference. A.This girl is competing in the Olympics. B.The basketball has both orange and light yellow sections. C.The girl s uniform says USA. D.The girl s mouth is open. E.The girl was attempting to make a layup. F. There was a large crowd watching this game.

28 Question 17 When Betty tried this new experiment, the results did not turn out the way she thought. Synthetic basketballs actually bounced a lot better in the cold than leather-covered ones. This didn t make sense because all NBA games use leather basketballs. What is the best thing to do if the experiment isn t going the way you thought it would? A. Change your hypothesis to match the results. B. Keep going with the experiment C. Change your question to match the results. D. Change your results to match the hypothesis.

29 Scenario Betty decided to track the rebound height of both types of balls over a whole week. She recorded the data in her journal and it looked like this: Mon Tue Wed Thu Fri Sat Sun synthetic leather

30 Question 18 What type of graph would be best to use for analyzing this data? a. Line graph b. Bar graph c. Circle Graph d. Data Chart e. Histogram

31 Question 19 Betty also thought that the synthetic basketballs may have just slightly less mass than the leather ones. She decided to mass both basketballs. A.Graduated Cylinder B.Petri Dish C.Flask D.Stopwatch E. Thermometer F. Triple Beam Balance Which of the following pieces of equipment would be best to use?

32 Question 20 What is the mass of this basketball? a. 424 g b. 244 g c g d. 424 kg e. 244 kg

Standard 3.1 The student will plan and conduct investigations in which

Teacher Name: Tammy Heddings Date: April 04, 2009 Grade Level: 3-6 Subject: Science Time: 30 minutes Concept: Scientific Investigation Topic: Variables SOLs: Standard 3.1 The student will plan and conduct