Names __________________________________________ period____________ date____________
Hypotheses and conclusions
Part A: Descriptions
1. What are the characteristics of a good hypothesis?
2. What are the characteristics of a bad hypothesis?
3. What are the characteristics of a good conclusion?
4. What are the characteristics of a bad conclusion?
Part B: Hypotheses
Indentify each as a good or bad hypothesis based on the descriptions in part A.
Good Hypothesis
Bad Hypothesis
1,
1.
2.
3.
4.
5.
Amount of sun exposure will increase the growth of a tomato plant.
Bacterial growth may be affected by temperature.
Clouds are more beautiful on winter days than on summer days
Female guppies prefer brightly colored males.
If temperature is related to the rate of metabolism in animals, then raising the ambient temperature will
cause an increase in animal metabolism.
6. Antibiotics are better than antibacterial products.
7. Plant growth may be affected by the color of the light.
8. Salt in soil may affect plant growth.
9. Tail wagging means a dog is happy.
10. Temperature may cause leaves to change color.
Part B: Conclusion
Based on the table below, identify the good (true or supported by evidence) conclusions and bad (false or
unsupported by evidence) conclusions for the data based on the descriptions from part A.
Good Conclusion
1,
Bad Conclusion
1. Air is the least dense material
2. Alcohols are less dense than water.
3. All metals have similar densities
4. Although water and ice are both H2O, they have different densities.
5. Aluminum is a commonly used metal in industry.
6. An unknown metal can be identified according to its density
7. Balsa wood floats in water
8. Density is mass/ volume
9. Five substances would float in water.
10. Gases float so they must have higher densities
11. Gold is expensive because it is the most dense
12. Ice and ethanol both float in water
13. If placed in a cylinder, the order from bottom to top would be water, methanol, ethanol, wood, ice.
14. If placed in a cylinder, the order from bottom to top would be water, methanol, ethanol, ice, wood.
15. Lead and gold are the most dense substances
16. Lead can be dangerous if consumed.
17. Most substances can be identified by their densities.
18. Solids are always more dense than liquids
19. The density was determined for ten substances
20. The unit for density is g/cm3