CFA 01 Scientific Process

What is a hypothesis?

• A hypothesis is the right answer to an experiment.

• A hypothesis is the wrong answer to an experiment.

• A hypothesis is a possible explanation for an observation.

• I don't know.

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

The summary at the end of an experiment that explains the results. 

• conclusion
• procedures
• materials
• responding variable

What is an observation for this picture?

• The man is scared
• The man is going to get eaten
• There is a man in a kayak
• The man is paddling fast

What skill is a scientist using when she listens to the sounds that whales makes.

• making hypothesis
• Interpreting data
• drawing conclusions
• making observations

Tags

NGSS.MS-LS1-8

Shannon is wondering why her skin is red and itchy after taking her bubble bath. Which stage of the scientific method is she in?

• Question or Problem

• Forming a Hypothesis

• Drawing a Conclusion

• Analyzing Data

Brian is measuring the weight of each rat and writing it down on a chart. Which stage of the scientific method is this?

• Hypothesis

• Collecting Data

• Question or Problem

• Conclusion

A student performed an activity with soil and water. The table below show the kind of soil that was added to each of two cans. After the soil was added, holes were made in the bottom of each can. Then a total of 200 milliliters of water was added to each can. The water that dripped from each can was collected for one minute. Which of the following is an observation in this experiment?

• Sunlight heats water in clay faster than water in sand.

• Plants grow better in clay than in sand.

• Water flows through sand faster than clay

• Insects are more active in sand than in clay.

A student makes a model of a volcano using paper and glue. The student's teacher puts on goggles and an apron. The teacher pours baking soda and vinegar into the volcano model. For 30 seconds, a white substance bubbles and expands from the volcano.

Which observation allows the student to conclude that a chemical reaction occurred?

• A white substance bubbled and expanded.

• Something happened in 30 seconds.

• The teacher wore goggles and an apron.

• The volcano was made from paper and glue

Tags

NGSS.MS-PS1-2