Midterm Q1 Exam Review 2020

An observation is _______.

Please select the best answer from the choices provided

• a possible explanation for events using prior knowledge

• always quantitative

• made using any of the five senses

• always qualitative

The experimentation step of scientific inquiry involves _______.

Please select the best answer from the choices provided

• analyzing data

• drawing a conclusion

• choosing variables and controls

• formulating a question

Tags

NGSS.MS-PS1-2

Which characteristic best distinguishes quantitative data from qualitative data?

• its validity

• its repeatability

• its ability to be graphed

• its ability to be recorded

Omar studies the effects of a drought on the depth of water in a pond. He takes a reading of the water depth at the same location in the pond every day for the duration of the drought. Which method of displaying data would he most likely use to show changes in water depth?

• a bar graph

• a line graph

• a data table

• a pie graph

A class was performing an experiment to discover the pH values of some common household substances. The results of three groups are shown in the table below.

Which statement best describes evidence that Group 3’s data are less valid than the data for the other two groups?

• Group 3’s pH value for lemon juice is lower than the values of the other two groups.

• Group 3’s pH value for vinegar is much higher than the values of the other two groups.

• Group 3’s pH value for baking soda does not exactly match the values of the other two groups.

• Group 3’s pH value for milk of magnesia is different from the value obtained by Group 2.

Tags

NGSS.MS-PS1-2

A scientist tracked the summer eating habits of brown bears. His results are shown in the graph below.

If the brown bears’ reliance on leaves increased by 14 percent, how would the combined total of all the percentages be affected?

• It would increase by 14 percent.

• It would decrease to 86 percent.

• It would remain at 100 percent.

• It would change to 114 percent.

Tags

NGSS.MS-LS2-1

Francine makes several measurements of the mass of a metal block. The data set is shown in the table below.

After analyzing this data set, Francine calculates a value of 20.73 g.

Which of these characteristics has been calculated?

• mean

• median

• mode

• range

In an investigation with density, Marcia’s teacher measures the mass and volume of 10 different samples of a substance. The samples are numbered 1 through 10. Then, the teacher makes the graph that is shown below.

What is the independent variable in this investigation?

• mass

• volume

• sample number

• substance density

Tags

NGSS.MS-PS1-2

Which is an example of negative acceleration?

• a snowboarder who increases speed when traveling downhill

• a biker who maintains a constant speed through a race

• a skateboarder who reduces speed when moving up a hill

• a runner who fluctuates speed by increasing and decreasing speed

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?

• negative acceleration of 4 m/s2

• positive acceleration of 4 m/s2

• positive acceleration of 9 m/s2

• negative acceleration of 9 m/s2

Tags

NGSS.HS-PS2-1