-ABLE WORDS
If something can be avoided, it is ________.
Avoidable
This extinct bird was famous for living on Mauritius.
dodo
The word ________ means "lived or was present in the past."
existed
Choose the correct answer: Scientists **have studied / have been studying** extinct animals.
have studied
An article gives facts about the dodo and explains why it became extinct.
inform
Someone you can depend on is ________.
Dependable
This extinct animal looked somewhat like a zebra and had stripes toward the front of its body.
quagga
Humans, elephants, whales, and dogs all belong to this group of animals.
mammals
Choose the correct answer: Scientists **have discovered / have been discovering** many fossils over the years.
have discovered
A poster says, "Protect endangered animals before it is too late!"
persuade
A baby animal that is very cute is ________.
Adorable
If people use animals or natural resources unfairly for their own benefit, they ________ them.
exploit
If an animal experienced pain or difficulty, we can say that it ________.
suffered
Complete: Scientists ________ (study) the effects of climate change for several years.
have been studying
A funny story tells about a woolly mammoth getting lost in a modern city.
entertain
Someone who gets excited very easily is ________.
Excitable
A species that is at serious risk of disappearing is ________.
endangered
The mixture of gases surrounding Earth is called the ________.
atmosphere
Complete: Researchers ________ (discover) several new species in this region.
have discovered
A science article explains how changes in Earth's atmosphere affected animals in the past.
inform
A sofa that feels good to sit on is ________.
Comfortable
A protected place where animals can live safely is called a ________.
sanctuary
Something that is unusual or uncommon can be described as ________.
rare
Which sentence focuses more on the **duration of an activity**? A. Scientists have studied the mammoth. B. Scientists have been studying the mammoth for three years.
B
An article explains the dangers facing endangered species and then tells readers, "Everyone must help protect their habitats."
persuade