Bungee Barbie Graph

Sorry about the shadow! Here is a sample of how to set up your graph.  You need lots of extra space to predict how many rubber bands you need to give Barbie or Ken a fun yet safe bungee jump.

Answers to Practice Test

Practice Test Chapter 1

Answers

1. 

Problem:  Galen wanted to discover the best insulator for keeping drinks cold.

Manipulated Variable:  Different types of insulating materials.

Controlled Variables:  Original temperature of the water, original temperature of the glass, same time in the Sun, same size of glass, same type of thermometer, 1 cm thick of each insulation, and 250 mL of water in each glass.

Quantitative Data:   Any of the final temperatures.  The temperature in the aluminum foil insulation was 18 degrees C after 30 minutes.

2.  To measure the volume of a liquid precisely you would use a graduated cylinder because it is divided up into 1 mL units.

3.  Mass is a measure of the amount of matter (atoms) in an object or substance.  Weight is a force determined by gravity’s affect on the mass of an object.  Weight is mass x gravity.  The units for mass are grams.  The units for weight are Newtons (kg x m/s²).

As gravity increases, so does weight.  As gravity decreases, weight decreases.  There may be no change in mass (no atoms gained or lost).

If I have a mass of 20 kg on Earth and I snapped my fingers and went to the Moon, my mass would stay the same (I haven’t gained or lost molecules).  My weight would go down because the Moon has a smaller gravitational pull than the Earth.  I would weigh about 44 pounds on Earth and about 7.3 pounds on the Moon.

4.  The graph shown below has uneven intervals on the x-axis for distance.  If you don’t make intervals equal, the trend shown in the graph (the slope of the line) will not match your data.