1 st Nine Weeks Bellwork Scientific Method What

1 st Nine Weeks Bellwork

Scientific Method �What are the seven steps of the scientific method?

Scientific Method �How do scientists develop a hypothesis? �How do they write their hypothesis?

Scientific Method �Why is it VITAL that you write down every tiny step you take in a procedure?

Observations �When making an observation, you use your five ______. �Name these five…

�What Observations is a QUALITATIVE observation? �What is a QUANTITATIVE observation? �Provide an example for each.

Observations �What kind of observations go into an experiments data table or graph?

Observations �What is an inference?

Observations �Make TWO different inferences about this picture.

Observations �Make THREE different inferences about this picture.

Predictions The pilot of a small plane parachutes out when the engine stalls. Is she more likely to land in water or on dry land? What fact(s) did you use to make your prediction?

Measurement

Measurement Find the volume of each shape:

Mean Find the mean for the following sets of numbers. a. 65, 79, 102, 88 ______ b. 502, 389, 743, 209, 444 _______ c. 98, 133, 56, 124 ______

Measurement A rock was placed into a graduated cylinder containing 100 milliliters of water. The diagram below illustrates the new level of water. What is the volume of the rock? (Use water displacement) Volume of rock: __________

Measurement Find the volume of the broccoli.

Experiments After you do an experiment, what’s one way to communicate your results? a. make a chart b. make a graph c. write a paragraph to explain your conclusion d. all of the above

Experiments You want to do an experiment to find out which kind of soil holds the most water. Before you begin, what should you do? a. Observe the soils and form a hypothesis. b. Find a fourth type of soil to test. c. Draw a conclusion. d. Wet all the soils

Experiment On a walk through the park, you observe squirrels and chipmunks. You would like to learn more about them. You decide to test the problem, “Are squirrels more afraid of people then chipmunks are? ” Based on the problem, write a hypothesis that you could test with this experiment.

Fair Experiments You want to experiment with floating and sinking. You test a piece of clay shaped like a boat. It floats. You test a round rock. It sinks. This experiment has a flaw (error). What is it and how would you fix it?

Fair Experiments You want to test paper-towel brands to see which is the most absorbent. You add 10 tablespoons of water to Brand A and find that it can absorb 2 -1/2 tablespoons. How much water should you add to Brand B? a. 2 -1/2 tablespoons b. 10 tablespoons c. more than 10 tablespoons d. ½ cup

Variables You want to do an experiment to find out which kind of soil holds the most water. Name one variable you will keep the same and one variable you will change in this experiment.

Controlled Variable You set up an experiment to test how a red filter will affect the light from a lamp. You put a red piece of plastic in front of a light. Everything in the room turns red. If you wanted a control for this experiment, it would be: a. a different light with a red filter. b. a different light with a green filter. c. the same light with a green filter. d. the same light with no filter.

Variables You want to test paper-towel brands to see which is the most absorbent. You add 10 tablespoons of water to Brand A and find that it can absorb 2 -1/2 tablespoon. Name the dependent variable in this experiment.

Variables You want to test paper-towel brands to see which is the most absorbent. You add 10 tablespoons of water to Brand A and find that it can absorb 2 -1/2 tablespoon. Name the independent variable in this experiment.

Conclusions You have two equal-sized pots with identical plants. Each plant was watered last week. You pour three cups of water into each pot. In pot A, no water comes out. In pot B, two cups of water come out. What could you conclude from the experiment? a. Plant A needs more water than plant B. b. Pot B absorbs more water than pot A c. Soil A holds more water than soil B d. Water acts differently under different conditions.