Graphing

Which statement is supported by the data in the table?

• Populations do not vary from month to month

• The populations are highest in September.

• The grasshoppers increased in length in July.

• Seasonal variations may affect populations

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

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• 2

• 3

• 4

Tags

NGSS.MS-PS3-1

Which statement is a valid conclusion regarding tooth decay?

• As sugar intake increases, the acidity in the mouth decreases, reducing tooth decay.

• As sugar intake increases, tooth decay increases in Europe and the Americas, but not in Africa and Southeast Asia.

• The greater the sugar intake, the greater the average number of decayed teeth.

• The greater the sugar intake, the faster a tooth decays.

Tags

NGSS.MS-PS1-2

The greatest difference between the incidence of measles and the incidence of bacterial pneumonia occurred in

• 1940

• 1950

• 1960

• 1970

A student measures his pulse rate while he is watching television and records it. Next, he walks to a friend’s house nearby and when he arrives, measures and records his pulse rate again. He and his friend then decide to run to the mall a few blocks away. On arriving at the mall, the student measures and records his pulse rate once again. Finally, after sitting and talking for a half hour, the student measures and records his pulse rate for the last time.

Which graph below best illustrates the expected changes in his pulse rate according to the activities described above?

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• 4

Tags

NGSS.MS-PS3-5