Bellwork1st Nine Weeks

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?

Scientific Method

When making an observation, you use your five ______.

Name these five…

Observations

What 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.

Observations

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?

Predictions

Measurement

Find the volume of each shape:

Measurement

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 ____________

Mean

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.

Measurement

After you do an experiment, what’s one way to communicate your results?

a. make a chartb. make a graphc. write a paragraph to explain your conclusiond. 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

Experiments

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.

Experiment

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 tablespoonsb. 10 tablespoonsc. more than 10 tablespoonsd. ½ cup

Fair Experiments

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.

Variables

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.

Controlled Variable

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.

Variables

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 Ac. Soil A holds more water than soil Bd. Water acts differently under different conditions.

Conclusions