Collecting & Analyzing Data

A scientist collected the following data on algal growth during an experiment:
Which of the following conclusions could be drawn from the data? 

• Algae multiply most rapidly at 35°C.
• Algae multiply most slowly at 20°C.
• Algae multiply most slowly at 10°C.
• Algae multiply most rapidly at 20°C.

Incorrect measurements, improperly recording data, and not using variables correctly are types of __.

• bias
• cause
• effect
• error

Tags

CCSS.HSS.IC.B.3

In science, we call a mistake in an experiment an _____.

• oopsy
• error
• excellent idea
• independent variable

What conclusion can you draw from this line graph?

• For the most part, the older the teenagers get, the more likely they are to have a cell phone.
• Older teens have less cell phones.
• People in their thirties have the least cell phones.
• No one should own a cell phone.

Inferences are

• never made by scientists.
• questions that are made by studying conclusions or predictions.
• conclusions or predictions that are made by studying observations.
• exactly the same as observations

Directions: Select the correct graph.
Mikey had two mice that were about the same age and weight. Mikey fed each of the two mice a different feed for a month. He measured how much the mice weighed every two days until the month was over. Mikey's results showed that although both mice gained weight over the month, mouse 2 gained more weight than mouse 1.Which graph below best shows these results?

• 1
• 2
• 3
• 4

Tags

CCSS.8.EE.B.5

Sean enjoys studying the stars. He used a photometry tool to calculate several stars' apparent magnitudes (how bright a star looks in the sky). He then researched the stars' distances from Earth. He recorded his results in the table below.
What conclusions can Sean draw from his chart?

• A star's apparent magnitude increases as its distance from Earth increases.
• A star's apparent magnitude decreases as its distance from Earth increases.
• A star's apparent magnitude decreases if it is very close to another star.
• A star's apparent magnitude is not directly related to its distance from Earth.

Mr. Swanson's science class used a thermometer to measure the outside temperature each day throughout the school year.
They used their results to make the graph below.

Which month had an average daily temperature of around 41 degrees?

• May
• April
• December
• March

The pictures below show a field that is being studied over time. In the field, there are rabbits (red circles) and foxes (blue circles). What conclusion can be drawn from these observations?

• The number of foxes decreases as the number of rabbits increases.
• The number of rabbits and foxes remains constant over time.
• The number of foxes remains constant while the number of rabbits decreases.
• The number of foxes increases while the number of rabbits decreases.

Dr. Peterson does an experiment to research the growth rate of mice. He has two groups of mice. He feeds one group a type of food and adds chemical A, which is supposed to increase growth rate. The other group he feeds the same food without chemical A added. His research shows that chemical A increases growth rate by 30%. He does the experiment 4 times and comes up with the same result each time.
Dr. Peterson concludes that chemical A does increase the growth rate of mice. Is Dr. Peterson's conclusion supported by scientific knowledge? 

• Yes; any study that involves a percentage is based on scientific knowledge.
• Yes; his conclusion is supported by evidence from his experiment.
• No; science cannot be used to research small animals such as mice.
• No; scientific knowledge never comes from research or experiments.