Bellringer Fri, 9/28

4 Minutes3 Minutes2 Minutes1 Minute30 Seconds10987654321Time’s Up!

In your own words… take a guess…• What is a law?• What is a theory?

The Scientific Method

College Readiness Standards - Science

Interpretation of Data (IOD)

Scientific Investigation (SI)

Evaluation of Models, Inferences, and

Experimental Results (EMI)

13-15

201 Select a single piece of data (numerical or nonnumerical) from a simple data presentation (e.g., a table or graph with two or three variables; a food web diagram).

202 Identify basic features of a table, graph, or diagram (e.g., headings, units of measurement, axis labels).

What to look for…Graphs MUST have all of the following:

1.Title

2.X-axis (independent variable)(Manipulated)

3.Y-axis (dependent variable) (Responding)

4.Labels of x/y axis and units

5.Plotted Data

6.Colors or Legend if necessary

6%

20%

27%

31%

7%7%

2%

iPhone User Age Distribution

13-1718-2425-3435-4950-5455-6465+

PIE GRAPHTitle Section Label

or Ledger

Percent Labels

BAR GRAPH

0

5

10

15

20

25

TREES IN CENTRAL PARK

ElmSycamoreSweet GumPine

Type of Tree

Num

ber o

f Tre

es

Title

Section Label or Ledger

Labels

Y ax

is

X axis

LINE GRAPH Title

Labels

Y ax

is

X axis

1 2 3 4 5 60

10

20

30

40

50

60

70

80

Temperature in New York City

Days

Tem

pera

ture

(°F

)Units of

Measurement

SCATTER GRAPH Title

Labels

Y ax

is

X axis

Title

Labels

Y ax

is

X axis

Histogram

Let’s Practice!!

Table 1

Flower Species

Pollen quantity (mg) per anther

Anther quantity per

flower

Stamens covered with

pollen (%)A 4.8 11 26B 7.9 18 26

Certain species of flowers attract more bees than others with the scent of their pollen. The pollen is found on a structure within the flower called the anther, which is located on top of a structure called the stamen. Flowers typically have multiple anthers and stamens. Bees carry pollen from the flowers on their legs. The bees move from flower to flower collecting pollen. Some of this pollen falls from their legs. This depositing of pollen causes crosspollination to occur (fertilization of the other flowers). Three studies were conducted to study this process.

Study 1For two flower species (A and B), pollen quantity per anther in milligrams (mg), anther quantity per flower in number, and percentage of stamens covered with pollen were recorded (see Table 1).

IOD 201

Study 2The researchers hand-pollinated flowers from a third species, Species C. They also observed the Species C plants being cross-pollinated by the bees in the area. All flowers were observed for 2 years. The scientists recorded the results in Table 2.

Table 2Cross-pollination of Species C flowers Results from:

Hand-pollinated flowers

Bee-pollinated flowers

Flowers that reproduced 30 11

Flowers reproducing after 1 year 9 33

Flowers reproducing after 2 years 7 14

Total flowers produced after 2 years

45 39

IOD 201

1. In Study 2, the bee pollinated flowers continued to reproduce as time went on. How many of these flowers total were produced after 2 years?

a. 11 b. 45c. 39d. 40 Table 2

Cross-pollination of Species C flowers Results from:

Hand-pollinated flowers

Bee-pollinated flowers

Flowers that reproduced 30 11

Flowers reproducing after 1 year

9 33

Flowers reproducing after2 years

7 14

Total flowers produced after 2 years

45 39

IOD 201

2. Based on the results provided in Table 2, if the flowers were hand pollinated, how many would be reproducing after 1 year?

a. 14b. 9c. 7d. 33

Table 2Cross-pollination of Species C flowers Results from:

Hand-pollinated flowers

Bee-pollinated flowers

Flowers that reproduced 30 11

Flowers reproducing after 1 year

9 33

Flowers reproducing after2 years

7 14

Total flowers produced after 2 years

45 39

IOD 201

1. According to Table 1, flower species B had what number of anthers per flower?

a. 11b. 18c. 7.9d. 4.8

Table 1

Flower Species

Pollen quantity (mg) per anther

Anther quantity per

flower

Stamens covered with

pollen (%)

A 4.8 11 26B 7.9 18 26

IOD 201

IOD 202

Time (sec)

Position (cm)

0.50 421.00 671.80 1062.50 179

Students in a summer science class studied the motion of a battery-powered toy car. For the three experiments they conducted, the toy car was allowed to move freely across the smooth surface of a lab table.

Experiment 1During the first experiment, students measured the position of the 58 g toy car with 3 cm width wheels after it had moved in a straight line for different amounts of time. The data for this experiment is given in Table 1.

Table 1

0.5 1 1.8 2.50

50

100

150

200

Position vs. Time Graph for a 58g Toy Car

Time (s)

Posi

tion

(cm

)

IV DV

IV

DV

Experiment 2In the second experiment, students changed the mass of the car and measured its position after 1.50 seconds. The toy car’s wheels were 3 cm in width. The data for this experiment is given in Figure 2.

IOD 202

0

20

40

60

80

100

120

140

160

180

15 35 55 75 95

Car Mass (g)

Po

sit

ion

(cm

)Po

sitio

n (c

m)

Figure 2IV

DV

IOD 202

Experiment 3Students altered the width of the wheels in the third experiment and measured the position of the 58 g toy car after 2.50 seconds. The data for this experiment is given in Table 3.

Wheel Width (cm)

Position (cm)

3 1084 1085 1086 108

Table 3

4 5 60

20406080

100120

Position vs. Wheel With of a 58 g Toy Car

Wheel Width (cm)Po

sitio

n (c

m)

IV DV

IV

DV

IOD 202

1. What units were used to measure Car Mass in Figure 2?a. gb. secc. cmd. none of the above

0

20

40

60

80

100

120

140

160

180

15 35 55 75 95

Car Mass (g)

Po

sit

ion

(cm

)Po

sitio

n (c

m)

Figure 2

IOD 202

2. What is the interval used for position in Figure 2?a. 10 cmb. 20 cmc. 30 cmd. 40 cm

0

20

40

60

80

100

120

140

160

180

15 35 55 75 95

Car Mass (g)

Po

sit

ion

(cm

)Po

sitio

n (c

m)

Figure 2

IOD 202

Time (sec)

Position (cm)

0.50 421.00 671.80 1062.50 179

Wheel Width (cm)

Position (cm)

3 1084 1085 1086 108

Table 1

0

20

40

60

80

100

120

140

160

180

15 35 55 75 95

Car Mass (g)

Po

sit

ion

(cm

)Po

sitio

n (c

m)

Figure 2

Table 3

3. Which data representation lists position as the dependent variable?a. Table 1b. Figure 2c. Table 3d. Both tables and figure 2

Table or GraphIV

IV

IV

DV

DV

DV

4 Minutes3 Minutes2 Minutes1 Minute30 Seconds10987654321Time’s Up!

What does the graph below say?