Quizizz #4 (2021) Living Enviornment

How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?

• 3 mL

• 4 mL

• 10 mL

• 11 mL

If a control group is not included in an experiment, it would be difficult to

• formulate a hypothesis for the experiment

• make observations about the experimental group

• record data in a data table

• draw a valid conclusion

An experiment was set up to determine the effect of nitrates, a pollutant, on the number of chloroplasts present in euglena. Five tanks were set up, each with euglena and a different concentration of nitrate solution: 0%, 0.5%, 1.0%, 1.5%, and 2.0%.

The tanks were placed in a sunny location where each tank received the same amount of light.

Which statement is a possible hypothesis for this experiment that could be supported by the results of this experiment?

• If the average number of chloroplasts in euglena decreases, will less nitrate be needed in each tank?

• If the nitrate concentration is increased, then the euglena will have a lower average number of chloroplasts.

• If the number of euglena in a tank increases, will more nitrates be produced?

• If the nitrate concentration is decreased, then more light will reduce the average number of chloroplasts in euglena.

An experiment was set up to determine the effect of nitrates, a pollutant, on the number of chloroplasts present in euglena. Five tanks were set up, each with euglena and a different concentration of nitrate solution: 0%, 0.5%, 1.0%, 1.5%, and 2.0%.

The tanks were placed in a sunny location where each tank received the same amount of light.

Which statement correctly identifies a variable in this experiment?

• The independent variable is the concentration of nitrate solution used.

• The dependent variable is the number of euglena placed in the tanks.

• The independent variable is the amount of sunlight.

• The dependent variable is the number of tanks used.

Which statement is best supported by the data in the chart?

• After exercise, the nonathletic students had a lower heart rate than the athletic students.

• After exercise, the heart rates of the athletic students returned to resting pulse in four minutes.

• During exercise, both groups of students had the same increase above their resting pulse.

• During exercise, the athletic students had a higher heart rate than the nonathletic students.

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Which graphed line best represents this data?

• 
• 
• 
• 

Students were asked to determine if they could squeeze a clothespin more times in a minute after resting than after exercising. An experiment that accurately tests this question should include all of the following except

• a hypothesis on which to base the design of the experiment

• a large number of students

• two sets of clothespins, one that is easy to open and one that is more difficult to open

• a control group and an experimental group with equal numbers of students of approximately the same age

The histogram shows data from how many students?

• 6

• 7

• 10

• 27

The analysis of data gathered during a particular experiment is necessary in order to

• (1) formulate a hypothesis for that experiment 
• (2) develop a research plan for the experiment 
• (3) design a control for the experiment 
• (4) draw a valid conclusion for that experiment

Tags

NGSS.MS-PS1-2