Properties of Water AND Some Vocab

Front

Formation of the hydrogen bond:

Back

The nitrogen has a partial negative charge, and the hydrogen attached to the oxygen has a partial positive charge.

Front

Properties of water at an air-water interface enable insects to walk on water due to:

Back

Hydrogen bonds at the water surface create surface tension, allowing deformation without breaking.

Front

Water adheres to xylem in plants, aiding upward movement from roots to leaves.

Back

Water and xylem are both polar; water forms hydrogen bonds with itself and xylem walls.

Front

How do water properties aid in human cooling through sweat?

Back

The high heat of vaporization of water allows the body to remove excess heat by changing from liquid to gas.

Front

Null hypothesis for evaluating extinctions in China (1950-2000):

Back

No significant difference between extinction rates of animals during this period and the background rate.

Front

Investigation of bacterial metabolism in Staphylococcus capitis with glucose. Dependent variable?

Back

pH

Front

Experiment on enzyme function affected by temperature. What must remain constant?

Back

A. Initial substrate concentration

Front

Belding’s ground squirrels make two calls: trill (medium-pitched) and whistle (high-pitched). An experiment tested their responses to these calls. Identify the independent and dependent variables.

Back

Independent: type of alarm; Dependent: percent of squirrels responding.

Front

In an experiment with rat liver cells exposed to radioactive amino acids, the sampling time is shown on the x-axis because:

Back

E. sampling time is the independent variable