) Mare is preparing an experiment using 3 cups, one made of paper, one of plastic and one of glass. She plans on pouring 50 ml of hot water from a pitcher into each of the 3 cups and record the temperature in 5 minute intervals. What is the independent variable in this investigation?

a. the time interval between measurements
b. the amount of water in each cup
c. the initial temperature of the water in the cups
d. the material the cups are made of

2) What question is mare most likely investigating?

a. what effect does temperature have on rate of evaporation?
b. which material makes the best insulator ?
c. how quickly do different amounts of water cool?
d. how longs does it take for 50 ml of water to reach room temperature

3)What would be the best way fro mara to display results of this investigation?

a. a pie chart
b. a stem and leaf plot
c. a line graph
d. venn diagram

1-B

2-B
3-C

I will be happy to critique your thinking.

I agree on 1 and 2, on 3 none are good methods. I would have used a bar chart. I suppose a line chart is a near relative, but I wouldn't use it.

The independent variable is D (The material the cups are made of). An independent variable is what is changed! The amount of water in each cup is the same...50mL, so that is the control group.

1) The independent variable in this investigation is d. the material the cups are made of.

2) Mare most likely investigating c. how quickly do different amounts of water cool?

3) The best way for Mara to display the results of this investigation would be c. a line graph.

1) The independent variable in this investigation is (d) the material the cups are made of. The independent variable is the one that the researcher controls or manipulates. In this case, Mare is using three different materials for the cups (paper, plastic, glass) and measuring the temperature of the water in each cup at regular intervals. By changing the material of the cups, Mare can observe any differences in the rate of temperature change.

To determine the independent variable in an investigation, you should identify the factor that the researcher intentionally changes or manipulates.

2) Based on the setup of the experiment, Mare is most likely investigating (d) how long does it take for 50 ml of water to reach room temperature. In this case, Mare is recording the temperature of the water in each cup at regular intervals to observe how quickly it cools down. By comparing the cooling rates of the water in cups made of different materials, Mare can determine which material allows the water to cool the fastest.

To determine the question being investigated, you should analyze the purpose or goal of the experiment based on the details provided.

3) The best way for Mare to display the results of this investigation would be (c) a line graph. A line graph is commonly used to show changes over time, which fits well with the experiment's focus on temperature changes at 5-minute intervals. Mare can create a line graph with the x-axis representing time intervals and the y-axis representing temperature. Each material (paper, plastic, glass) can be represented by a different line, allowing for easy comparison of the cooling rates.

To determine the best way to display the results, you should consider the type of data being collected and the most appropriate graph or visual representation for that data.