Experimental Design
Measurement & Equipment
Random
CER
Data Tables & Graphing
100
Which variable is purposely changed during an investigation?
Independent Variable
100
What measuring tool should I use to measure the length of my pencil? What units would I represent this measurement in?
Ruler, Centimeters
100
Is the following a qualitative or quantitative observation?
The bird has blue feathers.
Qualitative
100
Which part of our CER explains how the evidence supports the claim?
Reasoning
100
A student investigates how the amount of fertilizer affects plant height. Which variable should be placed on the Y-axis of the graph?
Plant height (DV)
200
Factors that are kept the same throughout an investigation are called:
Constants
200
A student wants to determine how long it takes a ball to roll down a ramp. Which tool should be used to collect the data?
Stopwatch
200
A bar graph has what type of data on the x-axis?
Qualitative
200
A student writes the following claim:
As the time a phone is used increases, the battery % decreases.
Draw a sketch of what you would expect this graph to look like.
200
A students compares the average height of plants grown in three different soil types. Which graph would be most appropriate?
Bar graph
300
Why should scientists change only one variable at a time?
To make the investigation fair
300
Two students measure 50 mL of water. Student A uses a graduated cylinder while student B uses a beaker. Which student is likely to have a more reliable measurement?
Student A
300
What type of relationship does the following graph show?
Positive
300
A graph has the trendline equation:
y = 17.3x + 15
What is the slope?
17.3
300
A student investigates how study time affects quiz scores. Which variable should be placed on the x-axis?
Study time (IV)
400
Students wanted to see how the volume of a helium balloon would change when the balloon was placed in rooms with different temperatures. What would be an appropriate control in this investigation?
Room temperature
400
What must you do before you find the mass of an object on an electronic balance?
Press the tare button
400
I need a graph to show the relationship between the amount of water used and plant growth. What kind of graph should I use?
scatter plot
400
Write a claim that best represents the relationship between the variables shown on the graph below.
As the temperature increases, the volume increases.
400
Look at the following graph. Identify the slope (with units).
7.9 %/hour
500
Students wanted to see how the volume of a helium balloon would change when the balloon was placed in rooms with different temperatures. Write a problem question for this investigation.
How does the temperature of the room affect the volume of the balloon?
500
A student wants to measure how far a toy car travels in 10 seconds. What equipment would they need to make the appropriate measurements?
ruler/meter stick & stopwatch
500
Why do scientists use multiple trials and averages when conducting an investigation?
To improve the reliability of results
500
A student collected the following data to determine how the temperature of water affected the dissolving time of sugar. The student claims that as the temperature increases, the dissolving time decreases. Provide evidence to support their claim. (2 sentences)
The slope is -3 s/oC. When the temperature increased from 20 oC to 40 oC, the average dissolving time decreased from 70 s to 40 s.
500
Below is a graph of position of a car over time. In which time interval did the car show the greatest increase in position?
Between 4 and 5 seconds