Focus On Life Science: California Grade 7

Lesson 1: Geologic Time and Mass Extinctions

Standards Check

1.
Which of these can affect climate and organisms? 4.b
A)volcanoes
B)global warming
C)global cooling
D)all of the above
2.
What is believed to have caused mass extinction at the end of the Cretaceous Period? 4.b
A)global cooling
B)volcanic activities
C)asteroid impacts
D)floods
3.
Climate is the pattern of __________ in an area over many years. 4.b
A)plants
B)weather
C)rain
D)sun
4.
What is the name of the gas in car exhaust that helps heat up our atmosphere? 4.b
A)carbon dioxide
B)oxygen
C)water vapor
D)hydrogen
5.
A direct result of global warming, as opposed to an indirect result, is __________. 4.b
A)increased flooding
B)melting glaciers
C)coral bleaching
D)increased global temperatures
6.
Order the divisions of geologic time from the longest to the shortest. 4.g
A)epochs, periods, eras, eons
B)eons, epochs, eras, periods
C)periods, epochs, eras, eons
D)eons, eras, periods, epochs
7.
What occurs at the end of a geologic era? 4.b
A)a comet hitting Earth
B)a flood
C)an extinction
D)a mountain-building event
Grade 7
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