The Practice of Science #3 2.1/1.5

Fernando is comparing magnets by counting the number of steel paper clips each will pick up. He concludes that some magnets are stronger than others.

Which of these observations provides evidence to support his conclusions?

• All the magnets were different sizes.

• The magnets were not all the same color.

• None of the magnets picked up all the paper clips.

• Some magnets picked up more paper clips than others.

Tabia drew this picture of what she observed after putting a pencil in a glass of water.

Which of these supports the conclusion that the light rays are bent as they pass from

the air to the water?

• Some of the water evaporated during the experiment.

• Cracks in the glass make the pencil appear to be broken.

• She takes the pencil out of the glass and it is in

  one straight piece.

• Changing the temperature of the water does not change

  the result.

Tags

NGSS.MS-PS4-2

Arnell is learning about magnets. Which of the following is the best example of an

evidence-based scientific observation about magnets that can be tested?

• A magnet will not pick up plastic paper clips.

• Magnetic force is similar to the force of gravity.

• People love to use magnets on their refrigerators.

• Magnets will no longer be used in one hundred years.

Jose wants to create an excellent science fair project for the school competition. In order for his project to be valid, which of the following must happen?

• The project must include his opinions.

• The results must be based on evidence.

• The project must prove his predictions correct.

• The results must be based on personal opinion.

One scientific method includes developing a prediction, testing the prediction under controlled conditions, and deciding whether the collected data supports the prediction. Which of the following is most likely to follow the steps of the scientific method?

• Using a computer model

• Reviewing past experiments

• Making observations in the field

• Carrying out an experiment in the lab

Tags

NGSS.MS-PS1-2

Jose want to do a science fair project on turtles. He wants to know when you are more likely to see a yellow-bellied slider (a water turtle) out of the water.

What type of an investigation will he conduct?

• An observational study where he goes out and observes turtles in nature.

• An experiment where he controls what time turtles are out of the water.

• A model where he creates a model of when turtles are out of the water.

• An experiment where he controls how much light turtles are exposed to in nature.

The poster in a classroom shows the steps of a scientific method.

Which statement is TRUE about this scientific method?

• It should be considered as a guideline.

• It lists the steps in order of importance.

• It should always be followed in the same order.

• It lists all the steps for every scientific investigation.

Scientists study many different things. What is true of all scientific investigations?

• All scientists use the same tools to solve problems.

• All scientists use different methods to answer questions.

• All scientists use the same steps in the same order to solve problems.

• All scientists use organized methods to answer questions and solve problems.