Science Fusion OH Unit 1 Lessons 3 and 4

Juan hypothesizes that some birds fly south to locations with warmer weather and blooming flowers during the winter months. Which procedure should Juan use to test his hypothesis?

• Set up observation posts in the south to verify the time of year that birds arrive.

• Tag the birds with transmitters and track their movement.

• Survey northern and southern residents about the birds in their areas.

• Observe the direction the birds fly when they depart in the winter.

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• The result of the experiment is not conclusive. Shakira should repeat the experiment.

• The graph does not support the original hypothesis. Shakira should revise the hypothesis and design a new experiment.

• The graph supports the hypothesis. Shakira should conduct several more trials to increase the accuracy of her data.

• The downward curve supports the hypothesis. Shakira should present her results to the class.

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Scientific investigations include many different steps. After which step in a scientific investigation might a scientist use results to reject an existing hypothesis and form a new hypothesis?

• Analyze data.

• Follow a procedure.

• Identify variables.

• Review safety practices.

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Why might a scientist choose to do fieldwork instead of a laboratory experiment?

• She needs to observe organisms under natural conditions.

• She needs a large amount of control.

• He needs to make exact measurements using large equipment.

• He needs to change one or more variables at a time.

In chemistry, scientists classify some elements as metals. Which property of the metal copper can a scientist identify through observation alone?

• It has a low electrical resistance.

• Its density is 8.96 g/cm.

• It has a metallic, golden-brown color.

• It is a good conductor of heat.

Students compete in a short race at a track meet. Which of the following is an example of a qualitative observation?

• the colors of the students' faces as they ran

• the distance ran by a student in meters

• the time passed from start to finish in seconds

• the heart rate of a student in beats per second

The volume of regularly-shaped objects can be found by measuring each side and multiplying. The volume of a box can be calculated using the following equation:

V = l x w x h

V is volume, l is length, w is width, and h is height. Which of the tools shown below would be best suited to making these measurements?

• 
• 
• 
• 

Rigby uses a pendulum to study oscillations. He measures the amount of time it takes for the pendulum to complete a full swing. What would be the best way to record the time of the pendulum swing?

• 3500 ms

• 0.0035 ks

• 3.5

• 3.5 s

What property is a spring scale used to measure?

• weight of an object

• flexibility of an object

• mass of an object

• size of an object

Many tools can be used to measure the volume of a liquid. Which tool gives the most precise measurement of liquid volume?

• beaker

• test tube

• measuring cup

• graduated cylinder