Grade 10 History of Life on Earth

The calculation of the age of an object by measuring the proportions of the radioactive isotopes of certain elements is 

• relative dating
• radiometric dating
• uranium dating
• isometric dating

Tags

NGSS.HS-PS1-8

A radioisotope's _________________ is the time it takes for one half of the mass of the radioisotope to change into another substance.

• half-twist
• day-life
• half-life
• change over

Tags

NGSS.HS-PS1-8

The oldest known fossils of multicellular organisms were found in rocks older than the 

• Cambrian period
• Precambrian period
• Hadeon Era

Tags

NGSS.MS-LS4-1

How long ago did the dinosaurs become extinct?

• a century ago

• 60 mya

• Dinosaurs became extinct 65 mya.

is this statement TRUE OR FALSE:

"The Earth was struck by an asteroid from outer space (at the Yucatan Peninsula off Mexico). This caused massive fires, earthquakes and tsunamis, as well as dust clouds that blocked the sun, so photosynthesis was severely reduced and global climate changed. Few animals survived, and these diversified to fill the vacant niches and multiplied to repopulate the earth. The mammals and flowering plants became the dominant life forms after the last mass extinction. "

• TRUE

• FALSE

HOW OLD IS THE EARTH WE LIVE IN?

• 4,6 billion years old

• 2000 YEARS OLD

• 5 BILLION YEARS OLD

Relative Dating is:

• Uses the radioactive material in rocks to determine when rocks were formed or the age of the rock. The radioactive elements in rocks decay slowly over time – known as radioactive decay.

• Looks at the comparative depths of fossils in rock to ascertain which are oldest and which are most recent.

which fossil is this?

• ammonite fossil

• trilobite

We are in the crisis of the sixth mass extinction large amounts of valuable oxygen and release smoke and carbon dioxide resulting in global warming and climate change; illegal hunting and habitat destruction. who is the cause?

• pollution

• climate

• animals

• humans

Tags

NGSS.MS-ESS3-4

What provides evidence about the history of life on Earth, and shows how organisms change through time?

• fossil record

• index fossil

• geologic time scale

• half-life

Tags

NGSS.MS-LS4-1