Are you my mother?

In paragraph 1, the words about the first 18 hours describe

• when chicks and ducklings learn to walk

• how long the experiment lasts for

• how long mother birds care for their young

• when imprinting happens

Imprinting happens when a baby bird makes an ___________ bond with its mother.

A chick peeps rapidly when

• it first sees its mother

• its mother is removed

• its mother is returned

• it is following its mother

Which words best replace an immediate bond in paragraph 2?

• a close tie

• a clear understanding

• an instant connection

• a sudden friendship

In paragraph 3, the words or even suggest what is stated is

• clear to see

• natural

• uncertain

• unusual

To measure how upset a chick is, scientists

• count the number of peeps a chick makes

• see how close a chick stays to its mother

• time how long it takes a chick to imprint

• record which objects make the chick fearful