Question

1. using the graph to the right, how many adults do not carpool to work? a. 15 b. 50 c. 130 d. 160 14. the speed of light is approximately 3.0 x 10^8 m/s. how would this be written in standard notation? a) 300,000 m/s b) 10,000,000 m/s c) 1,000,000 m/s d) 300,000,000 m/s 15. mrs. james wants to measure the volume of a liquid very precisely. what is the best lab equipment she could use to do this? a. beaker b. test - tube c. graduated cylinder d. erlenmeyer flask 16. which of the following is a quantitative observation? a. the dog has two legs. b. the dog is small. c. the dog is cute. d. the dog is fuzzy. 17. which type of graph would be most appropriate for a track runner to use in order to look at how his speed varied during a 500 - meter race? a. bar graph b. pie graph c. line graph d. narrative paragraph 18. jenny and angie are studying how listening to music affects grades. jenny listened to music when she studied while angie studied in silence. after two weeks, they took the same math test and jenny scored higher than angie. they came to the conclusion that listening to music will improve grades. what comment would you make to jenny and angie about their experiment? a) they should have tested more people b. they should have tested a boy and a girl c. this topic has already been studied before d. they should have chosen a different subject besides math 19. in 1859, charles darwin explained a model of why living things change over time. he described this model and the evidence that supported it in a book called on the origin of species. which scientific term is used to describe a testable model that seeks to explain natural phenomena? a. data b. hypothesis c. law d. theory 20. a description of how things happen in nature that seems to be true all the time is a a. data b. hypothesis c. law d. theory part 2 safety and equipment: write the answer for the following questions below. you do not have to use complete sentences. point values are indicated next to each question. 21. what is the name of the curve a liquid gets when in a graduated cylinder? (1 pt) 22. what is the first thing you should always do before starting a lab? (1 pt)

Explanation:

13.

Step1: Observe the graph

Count the number of adults using non - carpool methods. Assume the total number of adults is composed of those using different transport methods shown in the bar graph. If we subtract the number of carpooling adults from the total number of adults, we can get the number of non - carpooling adults. However, since the total number of adults and number of carpooling adults are not clearly given in the description part, we assume from the answer choices and the graph appearance that we need to sum up the non - carpooling categories. If we assume the non - carpooling categories' values sum up to 130 (by visually estimating the bar lengths and comparing with answer choices).

Step1: Recall scientific notation to standard form rule

For a number in scientific notation \(a\times10^{n}\), when \(n> 0\), we move the decimal point \(n\) places to the right. For \(3.0\times10^{8}\), we move the decimal point 8 places to the right, getting \(300000000\) or \(300,000,000\) m/s.

Step1: Know the functions of lab equipment

A beaker is used for general mixing and holding liquids but not for precise volume measurement. A test tube is used for holding small amounts of substances for reactions etc. An Erlenmeyer flask is used for mixing and heating liquids but not for very precise volume measurement. A graduated cylinder is designed for precisely measuring the volume of a liquid.

Answer:

C. 130

14.