Frozen Frogs

The author wrote this selection most likely to explain —

• F. the reasons scientists have been unsuccessful at freezing organs  
• G. how the wood frog survives in harsh conditions
• H. how wood frogs hibernate or migrate to warmer climates
• G. the scientific studies that involve wood frogs

In paragraph 2, the word vital means —

• A. fortunate
• B. common
•  C. necessary
• D. permanent

What can the reader conclude about wood frogs from learning that they hop away after thawing out?

• F. Wood frogs are not truly frozen during winter months.  
• G  Wood frogs have a special process for storing energy.  
• H  Wood frogs have a unique ability to know the temperature.  
• J  Wood frogs are not harmed by the body-freezing process.
  

Which of these ideas is supported by information in paragraphs 5 and 6?

•  A. Water helps the wood frog thaw its limbs.  
• B. The temperature of its surroundings determines how long a wood frog stays frozen.
• C. The time it takes for a wood frog to thaw is equal to the time it takes for the frog to freeze.
• D. The wood frog thaws faster than its surroundings.

The diagram of the wood frog helps the reader understand —

• F. which features can be used to identify a wood frog
• G. which characteristics make wood frogs able to freeze
• H. which temperatures the wood frogs are able to survive in
• J. which studies involving wood frogs have been performed

The reader can infer that the long life span of bristlecone pines is mainly a result of —

• A. their location in the Great Basin
• B. their root systems and outer wood
• C. the actions of park rangers
• D. the soil of the White Mountains

Which words from paragraph 2 help the reader understand the meaning of thrive?

• F. contains little water
• G. can damage
• H.battered by strong winds
• J. grow well

What is the main idea about bristlecone pine trees presented in the selection?

• A. They are found in mountainous areas.
• B. They are able to adapt to extremely harsh conditions.
• C. They are protected by park rules.
• D. They provide scientific clues about their environment.

The information in paragraph 4 helps explain why —

• F. many bristle cones are found in the White Mountains
• G. droughts in the White Mountains can affect the bristle cones
• H. some bristle cones can allow a part of themselves to die
• J. insects succeed in getting through the thick bark of bristlecones

The bar graph included with the selection helps the reader better understand —

• the factors that allow the bristlecone to live for so long
• B. that the life spans of trees can vary greatly
• C. why some regions produce trees that live as long as the bristlecone
• D. that other trees live in an environment similar to that of the bristlecone