Tom’s Report p21-23

Did you read the directions and his notes?

1. Title: Best container for soup and hot drinks

2. Problem/Question: Which type of container will keep a liquid hot?

3. Tom’s Hypothesis: If we put hot water in four different containers and measure their heat loss for 150 minutes, then the containers with a vacuum will keep the water hot the longest because heat won’t transfer through the air.

4. Independent variable: type of container

5. Dependent Variable: temperature

6. Control:1st container

2nd container

3rd container

4th container

Silver layer Silver layerVacuum

CONTROL!! Vacuum

Tom’s Report

7. Procedure (Step by step!)

1. Get 4 different containers

1. Silver layer

2. Silver layer and vacuum

3. Regular

4. Vacuum

2. Put 400 ml of water that is 100 degrees Celsius in each of them.

3. After 10 minutes, record the temperature in each container. Record again at 20, 30, 40, 60, 90, 120, 150 minutes.

Tom’s Report

8. Comparison of four containers chart

Time (min) Container 1

Container 2

Container 3

Container 4

0 100 100 100 100

10 99 100 97 99

20 95 99 94 98

30 91 99 91 97

40 88 98 88 97

60 83 97 82 95

90 74 96 75 94

120 67 95 68 93

150 65 94 65 92

Conclusion Tom wanted to know which container

would keep heat the longest. He put hot water (100ºC) in 4 different containers and measured their heat loss for 150 minutes. He thought that the containers with the vacuum would keep the heat the longest. He was right because the container with the silver layer did just as poorly as the control, losing 35°C total, while the containers with a vacuum lost less than 10°C total. In conclusion, the containers with the vacuum will keep water hot the longest.

Scientific Method Review and Study Guide

Basic Science Principles

1.A - Science is a way of knowing that can be used by anyone, not just scientists. Anyone can do science.

2.D - Scientific findings and principles are based on observable evidence

3.C - Scientists will revise what they know over time with new information and technology

4.B - There are many different ways to solve a problem or do an experiment in science. Scientific discoveries are made in many different ways

5. D – They are all watching examples of diffusion

6. B – Compare both tomatoes

7. Independent Variable – Type of Light

8. Dependent Variable – Growth of plant

9. Control – Plant in the backyard/sunlight

10.Hypothesis – If I grow plants in artificial light and sunlight, then the plants in the sunlight will grow faster than those under artificial light because plants need sunlight to survive.

11.Variables changed? 2 (light source and location)

12.No, because she changed more than one variable (same water, same time, but diff light and diff location)

13. Scientific method stepsa. Pose a question – Ask a question about something

observed (must be measurable)

b. Make a Hypothesis – try to answer the question using background knowledge/observations

c. Experiment – Test the hypothesis. Controlled experiment.

d. Analyze Data – determine results based on data. Use data tables and graphs

e. Conclusion – Summarize experiment and results. Answer the initial question.

14. May had the most candy sales

15. June and December had the lowest candy sales

16. December-16, June-34 so total =50 candies

b

17. June had the highest rainfall in Berlin

18. London had the most rainfall in October

19. London had less than 40mm of rain in February