Nature of Science

Why is it important for scientists to repeat their experiments?

• Repeating helps scientists to change their data.

• Repeating helps scientists to verify their results.

• Repeating helps scientists to get their data faster. 

• Repeating helps scientists to get the results they want. 

Von used three different types of bubblegum to make a bubble. He made a 5 cm bubble with bubblegum X. He made a 7 cm bubble with bubblegum Y. He made a 3 cm bubble with bubblegum Z. Which statement is a personal opinion about the bubblegum?

• Bubblegum X made a 5 cm bubble.

• Bubblegum Z made the smallest bubble.

• Bubblegum Y is the best choice for making bubbles.

• Bubblegum Y made a bubble 2 cm bigger than bubblegum X.

The teacher has assigned students to research the chemical make-up of the atmosphere of Jupiter. What is the best way to conduct this research?

• The students should create a model of Jupiter and its moons.

• The students should make a survey and ask friends for their opinions.

• The students should make a survey and ask friends for their opinions.

• The students should design an experiment following the scientific method.

A scientist is testing the effect of water with different amounts of sugar on plant growth. All plants will undergo the same procedure, except for the amount of sugar added to the water.

Which is the control group?

• Group W

• Group X

• Group Y

• Group Z

A student rolls one marble down a ramp and measures, in centimeters (cm), how far the marble travels before coming to a stop.

How could the student turn this investigation into an experimental investigation?

• Repeat the investigation with three trials at different ramp heights.

• Repeat the investigation 3 times, but with measurements in inches (in).

• Repeat the investigation with three trials using marbles of equal size and weight.

• Repeat the investigation 3 times, but with marks along the bottom of the ramp every 20 cm.