Question 1 (5 points)

A lab technician needs the weight of a substance. The technician weighs the substance once and records the result. The same substance is weighed again with a different result. To be sure, the technician decides to measure the weight several times and find the average weight. What type of error is the technician experiencing?

a	Gross error
b	Systematic error
c	Observational error
d	Random error

Question 2 (5 points)

A lab technician needs the weight of a substance. The technician places the substance on a scale without first checking to see if the instrument is calibrated correctly. The technician records the weight and later finds that there is an error. What type of error is the technician experiencing?

a	Gross error
b	Systematic error
c	Observational error
d	Random error

Question 3 (5 points)

Look at the image below showing the distance across a leaf. The ruler shows inches as the smallest unit of measure. If a person looks at the length of the leaf from position 2, what type of error is being experienced if it is already known that the true length of the leaf is inches?

a	Gross error
b	Systematic error
c	Observational error
d	Random error

Question 4 (5 points)

A researcher weighs an object 4 different times. The true weight of the object is 5 g. The researcher finds that the weights differ by as much as 1.2 g, but the average weight is 3.9 g. Describe the accuracy and precision of the weights.

a	High accuracy/ high precision
b	High accuracy/ low precision
c	Low accuracy/ high precision
d	Low accuracy/ low precision

Question 5 (5 points)

A researcher weighs an object 4 different times. The true weight of the object is 5 g. The researcher finds that the weights all differ by as much as 1 g and the average weight is 4.8 g. Describe the accuracy and precision of the weights.

a	High accuracy/ high precision
b	High accuracy/ low precision
c	Low accuracy/ high precision
d	Low accuracy/ low precision

Question 7 (5 points)

Look at the two images below. The image on the left is a 3-dimensional structure. The image on the right is a 2-dimensional representation of the same object. Which of the following describes the image on the right?

a	The plan of the structure
b	The front elevation of the structure
c	The side elevation of the structure
d	The top elevation of the structure

Question 8 (5 points)

Look at the two images below. The image on the left is a 3-dimensional structure. The image on the right is a 2-dimensional representation of the same object. Which of the following describes the image on the right?

a	The plan of the structure
b	The front elevation of the structure
c	The side elevation of the structure
d	The top elevation of the structure

Question 11 (5 points)

You want to hire a landscaper to plant new shrubs and flowers in the front of your house. Before agreeing to the work, you need to see an image of what the finished result should look like. Which of the following is the most appropriate means to represent the work?

a	A plan view of the area to be landscaped
b	A front elevation view of the area to be landscaped
c	A side elevation view of the area to be landscaped
d	A sheet of graph paper showing the x-y coordinates of the locations of the plants

Question 12 (5 points)

Suppose you need to measure the length of a trailer to be pulled behind a vehicle. Which of the following should you use to determine the length?

a	A ruler using inches
b	A ruler using centimeters
c	A tape measure using feet
d	A scale using kilograms

Question 13 (5 points)

Suppose you need to have a fence built in the shape of a rectangle to be used as a kennel for a very large dog. You need to make a drawing of where the fence will be constructed. What is the most appropriate means to visually represent the fence?

a	Use a blank drawing program on a tablet
b	Use a sheet of graph paper to represent the plan view of the structure
c	Use a sheet of paper and draw the front elevation of the fence
d	Try to draw a 3-dimensional view of the fence