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Harper Experimental Design 7th Grade
Test Description: Questions covering all of experimental design topics Lessons 1-5.
Instructions: Answer all questions to get your test result.
1) When doing scientific experiments, how many independent variables should the experiment have?
A
0
B
2
C
1
D
3
2) The independent variable can be described as
A
the data you are measuring
B
something that remains constant throughout the experiment
C
the part of the experiment used as a comparison
D
the one thing that is tested
3) The experiments dependent variable is also described as
A
the variable used as a comparison
B
the one thing changed and tested
C
the data that is measured during or after the experiment
4) All good fair experiments should have
A
all of these
B
an experimental group
C
1 independent variable
D
a control group
5) After an experiment has been completed, which should be done next?
A
send your data to the US president
B
throw the experiment out
C
repeat the experiment
6) Students want to test weed control cloth on their garden and section their garden into 4 parts; each gets a different weed cloth. 10 peppers were planted in each section, and all other growing conditions remained the same. What is the ind. variable
A
the health of the pepper plants at the end of the investigation
B
the type of soil in the garden sections
C
the type of weed control cloth
D
number of weeds in each section at the end of the investigation
7) Students want to test weed control cloth on their garden and section their garden into 4 parts; each gets a different weed cloth. 10 peppers were planted in each section, and all other growing conditions remained the same. What is the dep. variable
A
number of weeds in each section at the end of the investigation
B
the type of soil in the garden sections
C
type of weed control cloth
D
health of the pepper plants at the end of the investigation
8) A light bulb manufacturer plans to introduce a new type of energy efficient bulb. Which comparison is most helpful in determining if the new bulb meets the goal of decreased energy usage?
A
the spectrum of light produced by each bulb
B
the average number of hours the bulbs stay lit
C
the brightness of the bulb
D
the amount of electricity consumed to light each bulb
9) What type of graph is best to use if showing a comparison of data?
A
bar graph
B
circle graph
C
line graph
10) A student hypothesized that a mouse would learn to run through a maze faster if food was at the end of the maze. Which tool will best help the student determine if the speed of the mouse improved?
A
spring scale
B
metric ruler
C
pan balance
D
stopwatch
11) WHich tool would be best to measure the MASS of an object?
A
scale
B
graduated cylinder
C
hand lens
D
balance
12) Which of these is the best example of a product that results from adaptive engineering?
A
a water sprinkler activated by a timer
B
a system for planting different crops each year
C
a farm tool with a curved blade
D
a genetically modified plant species that resists pests
13) Students timed how long it took a beetle to travel across surfaces covered with different materials. All the surfaces were the same length. They calculated the average speed of the beetle and recorded the results. What is the independent variable?
A
length of each surface
B
speed of the beetle
C
time the beetle spent traveling across each surface
D
material that covered each surface
14) An engineer builds a new machine that cuts glass. The machine holds a sharpened mineral that is used to cut the glass. Which test will best determine if the new machine works?
A
test the machine using different thicknesses of glass
B
test the machine at different speeds
C
test the machine at different times of the dat
D
test the machine using different people
15) Students need to measure the rate at which water flows through different soil types. The students have a graduated cylinder. Which other tool will best help students perform this investigation?
A
meter stick
B
stopwatch
C
thermometer
D
measuring cup
16) Students wanted to measure the volume of a small screw. What tool would be best?
A
graduated cylinder
B
ruler
C
balance
D
beaker
17) A student wanted to measure the volume of a box. What tool would be best?
A
scale
B
graduated cylinder
C
ruler
D
balance
18) A student wanted to heat 200 ml of water. What tool would be best?
A
thermometer
B
beaker
C
microscope
D
graduated cylinder
19) A student wanted to measure the temperature of boiling water. What tool?
A
thermometer
B
beaker
C
stop watch
D
flask
*select an answer for all questions
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