Science Skills

7. Which of the following statements is the best example of a testable hypothesis?

• Why do light bulbs produce so much heat?
• Ultraviolet radiation does not cause skin cancer.
• How many different light bulbs have been produced?
• If a light bulb is blue then it will produce a darker shadow than a red light bulb.

8. A student is using a beaded chain to create waves on a desktop. In the first trial, the student moves the chain slowly, stops, then draws the resulting wave. In the second trial, the student moves the chain quickly, stops, then draws that resulting wave. What is the independent variable in this experiment?

• The resulting wave
• The beaded chain
• The speed the student moves the chain
• The number of trials

9. Joe wants to test the effects of different light bulbs on shadow darkness. While setting up his experiment he makes sure to set each light bulb the same distance from the screen, uses the same outlet for each bulb, and uses the same object to produce the shadows for each trial. Which phrase below best describes this part of the experiment?

• Analyzing results
• Forming a hypothesis
• Collecting data
• Setting up constants

10. Noelle hypothesizes that wax has a higher melting point than chocolate. How can Noelle test her hypothesis?

• Heat samples of wax and chocolate and use a stopwatch to time how long it takes them to melt.
• Heat equal masses of wax and chocolate and measure their temperatures.
• Use Mohs Hardness Scale to test how easily wax and chocolate can be scratched.
• Measure the volume and weight of samples of wax and chocolate and calculate their densities.

11. Students are using red, blue, and green color filters to combine them in order to see which colors they can produce. The students shine the flashlights through the filters onto the screen from 30cm away. After each color combination, students record the color that they observe on the screen. The dependent variable is:

• The different color filters
• The colors they observed on the screen
• The flashlights
• The distance away from the screen

12. If you were running an experiment to determine the temperature at which beans sprout the fastest, what would be the independent variable?

• The number of beans you plant
• The height of the sprouts you grow
• The amount of water you give the beans
• The temperature at which each bean is kept

13. A science experiment was conducted in which four plants of the same type were given varying hours of sunlight for one week. At the conclusion of the experiment, the final growth of the plant was recorded. The scientist also recorded her observations of the color of the leaves of each plant to evaluate the health of it based on the varying hours of sunlight. What was the independent variable?

• Plant growth
• Color of the leaves
• Type of plant
• Height of the plant (cm)
• Amount of sunlight

14. A science experiment was conducted in which four plants of the same type were given varying hours of sunlight for one week. At the conclusion of the experiment, the final growth of the plant was recorded. The scientist also recorded her observations of the color of the leaves of each plant to evaluate the health of it based on the varying hours of sunlight. What was the dependent variable?

• Plant growth
• Color of the leaves
• Type of plant
• Height of the plant (cm)
• Amount of sunlight

15. A science experiment was conducted in which four plants of the same type were given varying hours of sunlight for one week. At the conclusion of the experiment, the final growth of the plant was recorded. The scientist also recorded her observations of the color of the leaves of each plant to evaluate the health of it based on the varying hours of sunlight. What was the qualitative data?

• Plant growth
• Color of the leaves
• Type of plant
• Height of the plant (cm)
• Amount of sunlight

16. A science experiment was conducted in which four plants of the same type were given varying hours of sunlight for one week. At the conclusion of the experiment, the final growth of the plant was recorded. The scientist also recorded her observations of the color of the leaves of each plant to evaluate the health of it based on the varying hours of sunlight. What was the quantitative data?

• Plant growth
• Color of the leaves
• Type of plant
• Height of the plant (cm)
• Amount of sunlight