Physical Science

What is the first step in the scientific method?

• Ask a question

• Hypothesis

• Conclusion

• Analyze data

A student wants to perform a science experiment about plants. He wants to know if a certain type of soil will make plants grow taller. Each pot will receive a different type of soil, but will get the same type of seed, water amount, and sunlight amount.What is the Independent Variable in this story?

• Amount of sunlight

• How tall the plant will grow

• Amount of water

• Type of material the plant is growing in

This bar graph shows the number of cheeseburgers sold at McYummies drive thru last week. Study the graph and answer the following question.

What was the maximum number of burgers sold, and on which day was this?

• 30 burgers on Tuesday

• 60 Burgers on Thursday

• 20 Burgers on Thursday

• 25 Burgers on Monday

Why do many experiments include several trials instead of a single trial?

• Repetition of trials increases the accuracy of the results

• Repetition of trials decreases the sample size of the experiment.

• Repetition of trials makes data easier to analyze.

• It is not necessary to repeat trials

The factor in an experiment that will be changed. 

• dependent variable
• independent variable
• controlled variable
• inferences 

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method
• recipe
• data collection
• metric system

The test of a hypothesis is called a

• control
• dependent variable
• conclusion
• experiment

The name of the information that you get from your experiment (you organize it into charts and graphs).

• observations
  conclusion
• data
• variables
• hypothesis

Jennifer wanted to study the effect of sunlight on plant growth. So she decided to expose 10 identical plants to various amounts of sunlight each day (2 hours, 3 hours, 4 hours, 5 hours, and 6 hours). After one month, she measured the weight of the plants. What was the independent variable?

• Hours of sunlight

• Plant weight

• Type of plant

Jennifer wanted to study the effect of sunlight on plant growth. So she decided to expose 10 identical plants to various amounts of sunlight each day (2 hours, 3 hours, 4 hours, 5 hours, and 6 hours). After one month, she measured the weight of the plants. What was the control?

• Hours of sunlight

• Plant weight

• Type of plant