This learning resource is available in interactive and printable formats. The interactive worksheet can be played online and assigned to students. The Printable PDF version can be downloaded and printed for completion by hand.
This audio-integrated reading passage, "The Life of Amphibians," is designed for 4th-grade students to explore the fascinating world of amphibians. It aligns with the Next Generation Science Standards (NGSS) by teaching students about the biological evolution of animals that live both on land and in water. The passage explains key concepts such as the life cycle of amphibians, defining terms like metamorphosis, tadpole, and cold-blooded. Students will learn how amphibians have evolved to live a "double life," starting in water and moving to land. The passage also touches upon their importance in the ecosystem and their role as indicators of environmental health. With a clear and simple tone, this resource helps young learners understand how physical traits and behaviors of organisms are shaped by their environment.
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The life cycle of a frog shows the process of metamorphosis.
What is an Amphibian?
Amphibians are special animals that live two different lives. Their name means "double life" because they start life in water and later move to land. Amphibians are cold-blooded, so their body temperature matches the temperature around them. This means they might be cool in the morning and warmer in the afternoon.
One important feature of amphibians is their moist skin. Their skin is smooth and wet, which helps them breathe. They do not have scales like fish or reptiles. Amphibians need to keep their skin wet, so they usually live near water, such as ponds, streams, or wet forests.
Amphibians go through a big change in their lives called metamorphosis. They are born in water as eggs. When the eggs hatch, baby amphibians, like frog tadpoles, have gills and a tail. As they grow, they lose their gills and grow lungs and legs. Finally, they become adults who can live on land.
There are three main groups of amphibians. Frogs and toads have no tails and can hop. Salamanders and newts have long tails and walk with short legs. Caecilians are less common—they look like worms and have no legs at all.
Most amphibians lay soft eggs in water, not hard-shelled eggs like birds. They are important because they eat insects, become food for other animals, and help show if water is clean. Amphibians are like superheroes with two lives—one as a swimming water baby, and one as a hopping land adult!
Interesting Fact: Frogs do not drink water with their mouths—they soak it up through their skin!
What does 'amphibian' mean?
Double lifeAlways in waterOnly on landBig animal
What do amphibians use to breathe as babies?
GillsLungsSkin onlyMouth
Where do amphibians lay eggs?
In waterOn treesIn soilOn rocks
Why must amphibians keep their skin moist?
To help them breatheTo hop fasterTo keep warmTo see better
What group has no legs and looks like worms?
CaeciliansFrogsToadsSalamanders
What is the effect of metamorphosis?
Body changes formEggs get hardSkin gets dryNo more legs
Frogs drink water through their skin.
TrueFalse
What does 'cold-blooded' mean?
Body matches surroundingsBody always warmHas cold bloodNeeds ice
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