Unit 1 Scientists at Work

What tool measures mass? And what is the unit of measure for mass?

• Graduated Cylinder, mL

• Balance, g

• Spring Scale, N

• Measuring tape, cm

Which of the following is a testable question (may be more than one)?

• Which flavor ice cream is the best?

• Does more rain fall near the ocean, or inland?

• Does Tupperware or sandwich bags keep fruit fresher longer?

• Are soft or firm pillows better?

What is the first step in the scientific method and the engineering design process?

• Plan/Design Experiment

• Analyze Data

• Hypothesis

• Question/Problem

What is an hypothesis

• A detailed plan or design in which to carry out experiments.

• A testable question

• An educated guess or prediction on what you believe the outcome will be.

• Drawing conclusions on the data collected during an experiment.

Tags

NGSS.MS-PS2-2

What is the volume of the marble?

• 56 mL

• 2 mL

• 50 mL

• 6 mL

Sarah wanted to see if she could throw a baseball or a softball farther. What would be the dependent variable in this experiment?

• the weight of the baseball and softball

• the type of ball she is throwing

• the distance she throws each ball

• the starting point where Sarah throws the ball

Tags

NGSS.MS-PS2-2

Sarah wanted to see if she could throw a baseball or a softball farther. What would be the independent variable in this experiment?

• the weight of the the baseball and softball

• the type of ball she is throwing

• the distance she throws each ball

• the starting point where Sarah throws the ball

Sarah wanted to see if she could throw a baseball or a softball farther. What would 4 control variables be in this experiment?

• Starting Point

• Place thrown

• Time thrown

• The force used to throw the ball

• The way the ball is thrown (overhand, underhand, taking a step into it or no step)

Zack is conducting an experiment to test if large eggs break easier than medium eggs. After testing one of each egg, he found the large egg broke easier than the medium egg. What can he do next to prove his results are valid?

• Create a graph to communicate data

• Draw conclusions about his hypothesis

• Repeat the exact same steps and see if he gets the same results

• Try a new experiment with large and medium eggs

Tags

NGSS.MS-PS2-2

Carly's rabbit eats 1 cup of lettuce every day. She wanted to test to see if the rabbit preferred other vegetables to lettuce. She decided to give the rabbit three choices and see which it ate the most of. She gave it one cup of lettuce, one cup of carrots, and one cup of broccoli. What is the control group in this experiment?

• 1 cup of lettuce

• 1 cup of carrots

• 1 cup of broccoli