Big Idea 1 & 2 Review

You are given a bag but you cannot look inside the bag. You can, however, feel and smell what is inside the bag. Which of the following is NOT an observation about what is in the bag?

• The object is bumpy.

• The object smells like candy.

• The object is a sphere.

• The object is bubble gum.

Tags

NGSS.2-PS1-1

Erin conducted an experiment. She was trying to find out if different types of music affected the rate of a person’s heart. Her hypothesis was that classical music would slow down a person’s heart rate. Each person listened to five different songs for one minute each. Each person’s pulse was taken after listening and recorded. Based on her results, Erin concluded that a person’s heart rate did slow down when the person listened to classical types of music.

What is missing from Erin’s experiment?

• Question

• Hypothesis

• Control

• Data

Which of the following is a testable question?

• What color is the best to paint with?

• What animal makes a good pet?

• What is the best flavor of soft drink?

• What causes some metals to rust?

Tags

NGSS.MS-PS1-2

Ellie conducts an investigation to determine if size or weight affect how fast objects fall. Her experiment includes repeatedly dropping a basketball and a golf ball at the same time. After many trials, she determines that both balls land at the exact same time. Why would Ellie’s experiment be valid?

• It includes her opinion.

• It is based on evidence.

• It uses objects that move.

• It proves her predictions are correct.

Tags

NGSS.MS-PS2-2

Two students were testing paper airplane designs. One plane had straight wings, while the other had bent wings. The students stood side by side and threw their planes at the same time. They did this six times and measured how far each plane flew in meters. Of the following options, which would be the best way to determine if their results are valid?

• Have other friends try the same experiment.

• Throw the planes in different locations.

• Throw with their eyes shut.

• Bend the wings on both planes.

Tags

NGSS.MS-PS2-2

Joe is performing an investigation using several earthworms. He places a rectangular box under a bright lamp and covers one-half of the box so that it is shaded. He then puts the earthworms into the box on the side that is still brightly lit. Later, Joe notices that all of the earthworms have crawled over to the shaded side of the box. Based on his investigation, which of the following is an observation and NOT a personal opinion?

• Earthworms are afraid of light.

• Earthworms like staying together.

• Earthworms move away from light.

• Earthworms like living in the ground.

Why should scientists write down their experimental procedures?

• So that the exact experiment can be repeated by others and the results compared.

• So that the experiment can be changed by others to get different results.

• So that the data will help people make decisions.

• So that the data will prove their hypotheses correct.

For her science fair project, Marcy is investigating how levels of carbon dioxide affect plant growth. Which of the following is most important for Marcy to do?

• She needs to make sure her results match her predictions.

• She needs to make sure that her results contain both words and numbers.

• She needs to make sure that the explanation of her results is based on evidence.

• She needs to make sure her results get published so that everyone can read them.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Becky is doing an experiment to find out whether mold grows faster on specific types of yogurt. She has four different types of yogurt. She places them out on the same counter. Every day, Becky examines each yogurt for signs of mold growth. She then records her observations. Which variable is Becky changing in the experiment?

• the type of mold

• the type of yogurt

• the amount of light each yogurt receives

• the amount of time each yogurt is left out

Scientists include controls in their experiments. Why is a control important?

• It helps scientists share results.

• It helps scientists form their personal opinions.

• It helps scientists record their repeated observations.

• It helps scientists compare their results to a standard.

Tags

NGSS.MS-PS1-2