Scolecophidia
Some snakes live in the dirt. They are very small. They look like worms. These snakes like to hide in the ground. They eat tiny bugs. Do you like looking for bugs in the dirt?
Early Reader · Change the reading level on the articleLife Science articles — Page 100
Read about living things, from cells and plants to animals and the human body. Choose an article below; its reading controls let you move between the available levels.
5,533 public articles · Page 100 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Scoliosis
Your spine is the bones in your back. Sometimes, the spine curves to the side. It might look like the letter S. This can make your back hurt. Some people wear a brace to help. Do you know where your spine is?
Early Reader · Change the reading level on the articleScolopendra gigantea
This is a very big centipede. It lives in the dark woods. It likes to hide under rocks. It eats many small animals. It can be a bit scary. Can you find it?
Early Reader · Change the reading level on the articleScolopendridae
Some big bugs have many legs. They are called centipedes. Most have many pairs of legs. Some have no eyes at all. They live in the dirt. They are very neat to see. Do you like bugs?
Early Reader · Change the reading level on the articleScombridae
Some fish swim very fast. They live in the deep blue sea. These fish help feed many people. They have smooth bodies to move well. We can see them in the ocean. Do you like to eat fish?
Early Reader · Change the reading level on the articleScops owl
These are small owls. They are brown like tree bark. This helps them hide. They hunt for food like bugs and mice. They make soft whistling sounds. Do you like owls?
Early Reader · Change the reading level on the articleScorpaenidae
Some fish have sharp spines. These fish live in the sea. They can sting you. This helps them stay safe. We must be careful around them. Do you like looking at fish?
Early Reader · Change the reading level on the articleScotoplanes globosa
The sea pig lives in the deep sea. It is a small, white animal. It has many long legs. It uses its legs to walk on the floor. It eats bits of food that sink down. Do you think it is cute?
Early Reader · Change the reading level on the articleScreamer
Screamers are big birds. They live in South America. They have long legs and big feet. These birds eat plants in the water. They make very loud calls. Can you make a loud sound?
Early Reader · Change the reading level on the articleScreaming
A scream is a very loud sound. It happens when we push air out fast. We might scream when we are sad or mad. It can also show we are happy. It is a way to tell people how we feel. Have you ever made a loud scream?
Early Reader · Change the reading level on the articleScreening (medicine)
Doctors use tests to check our health. These tests find problems early. They help us stay well. They can check our eyes or ears. This helps us stay strong. Do you go to the doctor for checkups?
Early Reader · Change the reading level on the articleScurvy
Our bodies need special food to stay strong. We get this from fruit and greens. Without it, we feel very tired. Our skin and gums can get sore. Eating oranges helps us feel better. Do you like eating fruit?
Early Reader · Change the reading level on the articleScutigera coleoptrata
The house centipede is a tiny bug. It has many long legs. It can run very fast. It eats other small bugs. This helps our homes stay clean. Have you seen one?
Early Reader · Change the reading level on the articleScutosaurus
This was a big lizard. It had hard plates on its skin. These plates were like armor. It lived a long time ago. The lizard was very heavy. Can you imagine a lizard that big?
Early Reader · Change the reading level on the articleScyliorhinidae
These sharks are called catsharks. They live on the bottom of the sea. Many have spots or stripes. They are not bad for people. Some lay eggs in small cases. These look like little purses. Do you want to see one?
Early Reader · Change the reading level on the articleScylla serrata
This is a big mud crab. It lives in the sea. Its shell is green or brown. It has lots of meat inside. We must be kind to them. Can you see the crab?
Early Reader · Change the reading level on the articleScyphozoa
True jellies live in the sea. They look like little cups. They use stinging parts to catch food. They can be very big and colorful. These jellies are very cool. Do you like the ocean?
Early Reader · Change the reading level on the articleSea anemone
A sea anemone lives in the sea. It has many long arms. These arms help it catch food. Some fish live near them for safety. They look like bright flowers. Do you like bright colors?
Early Reader · Change the reading level on the articleSea apple
The sea apple is a bright animal. It lives in the deep blue sea. It has many soft, feathery arms. These arms catch tiny food from the water. It can even swell up to grow big! Do you like bright colors?
Early Reader · Change the reading level on the articleSea eagle
Sea eagles are big birds. They live near water. They like to eat fish. These birds are very strong. They can help us learn about nature. Do you like big birds?
Early Reader · Change the reading level on the articleSeagrass
Seagrass is a plant in the sea. It grows in big green beds. These beds give food to sea life. It helps the ocean stay healthy. We need to help it grow. Do you like the sea?
Early Reader · Change the reading level on the articleSeagrass meadow
Green grass grows under the sea. It lives in shallow water. Many fish hide in the grass. It helps keep our air clean. It is a busy home for sea life. Do you like the ocean?
Early Reader · Change the reading level on the articleSea krait
The sea krait is a striped snake. It lives in the ocean. It also likes to be on land. It swims with a flat tail. It lays eggs on the shore. This snake is very shy. Do you like snakes?
Early Reader · Change the reading level on the articleSea lamprey
The sea lamprey is a strange fish. It has a round mouth. It looks like a sucker. This fish eats other fish. It can be a pest in big lakes. Do you think it looks scary?
Early Reader · Change the reading level on the articleSea lettuce
Sea lettuce is a green plant. It lives in the sea. It looks like a green leaf. Many animals eat it. Some people eat it too. It can be in a soup. Have you seen green seaweed?
Early Reader · Change the reading level on the articleSea lion
Sea lions live in the ocean. They have small ears on their heads. They use long flippers to swim. They can even walk on four legs! They eat a lot of food. Do you like to swim like a sea lion?
Early Reader · Change the reading level on the articleSea-Monkeys
Sea-Monkeys are tiny pets. They live in salt water. You add eggs to the water. Then the little pets hatch. They are fun to watch grow. Do you want to see them swim?
Early Reader · Change the reading level on the articleSea pen
A sea pen lives on the sea floor. It looks like a soft plant. It stays in the sand. It eats tiny bits of food from the water. It can even glow in the dark! Do you like the sea?
Early Reader · Change the reading level on the articleSea slug
Sea slugs live in the ocean. They are like snails without shells. Some are very bright colors. This helps them stay safe. They have many shapes and sizes. Can you find a colorful one?
Early Reader · Change the reading level on the articleSea snail
Sea snails live in the ocean. They move very slowly. Most have a hard shell. The shell is like a small house. It helps keep them safe. Do you like looking at shells?
Early Reader · Change the reading level on the articleSeasonal tropical forest
Some forests have wet and dry times. It rains a lot in the wet season. Then it gets very dry. Some trees lose their leaves when it is dry. This helps the forest stay healthy. Do you like the rain?
Early Reader · Change the reading level on the articleSea spider
A sea spider lives in the ocean. It has very long legs. It looks like it has no body. The legs are much bigger than its body. They help it walk on the sea floor. Do you want to see one?
Early Reader · Change the reading level on the articleSea toad
The sea toad lives in the deep sea. It stays near the bottom. It has a very big mouth. Some can even walk on the floor. It uses a light to find food. Do you want to see them?
Early Reader · Change the reading level on the articleSebastinae
Some fish live in the deep sea. They are called rockfish. They have sharp spines on their bodies. These spines can sting you. They live in many big oceans. We can see them in the water. Do you like to look at fish?
Early Reader · Change the reading level on the articleSecondary metabolite
Plants and bugs make special things. These things help them live. Some help a plant stay safe. Others can help people feel better. We use them as medicine. Do you like to explore nature?
Early Reader · Change the reading level on the articleSecond messenger system
Cells use tiny signals to talk. A signal hits the outside of a cell. It cannot get inside alone. So, it makes a second signal. This new signal moves inside the cell. It tells the cell what to do. Can you imagine tiny…
Early Reader · Change the reading level on the articleSecretin
Your body has a tiny helper. It works in your tummy. It helps keep things safe. It stops things from being too sour. This helps you eat food. It is very smart! Can you feel your tummy work?
Early Reader · Change the reading level on the articleSedative
Some things help us feel calm. They slow down our brain. They help us rest. Doctors use them to help people feel less scared. They can also help us sleep. Do you know how you feel when you are calm?
Early Reader · Change the reading level on the articleSeed dispersal
Plants move their seeds to new places. Some seeds fly in the wind. Some seeds float on water. Some seeds stick to animal fur. This helps new plants grow far away. It is like a long trip! Can you find seeds in your yard?
Early Reader · Change the reading level on the articleSeed plant
Some plants make seeds. These seeds grow new plants. You see them in many places. Many trees have them. They help our world grow. Can you find a seed?
Early Reader · Change the reading level on the articleSelaginella
Some plants can come back to life. They curl up into brown balls. This happens when it is dry. Then they get water. They turn green and grow again. Do you like green plants?
Early Reader · Change the reading level on the articleSelf-control
You can choose how to act. Sometimes you want a treat right now. But you can wait to be healthy. This helps you reach your goals. It is like a muscle that gets strong. Can you try to wait today?
Early Reader · Change the reading level on the articleSelf-replication
Some things can make copies of themselves. Small parts of your body do this. They make more parts to help you grow. This is how life works. It is very cool! Can you find things that grow?
Early Reader · Change the reading level on the articleSemnopithecus
These monkeys are gray. They have black faces. They live in trees and on the ground. They eat leaves and fruit. They like to live in groups. Do you like monkeys too?
Early Reader · Change the reading level on the articleSensory neuron
Your body has tiny messengers. They tell your brain what you feel. They help you smell food. They help you see light. They help you taste sweets. These messengers help you stay safe. Do you feel the air on your skin?
Early Reader · Change the reading level on the articleSentience
Some animals can feel things. They feel happy or sad. They can feel pain too. This helps them stay safe. We should be kind to them. Do you feel things too?
Early Reader · Change the reading level on the articleSepal
A flower has small green parts. They are like a little coat. They keep the flower safe in a bud. They also hold up the petals. These parts help the plant grow. Do you see them on a flower?
Early Reader · Change the reading level on the articleSepsis
Sometimes germs make our bodies feel very sick. They can make your heart beat fast. You might feel very hot or cold. It is important to see a doctor. Doctors help you get better. Do you feel well today?
Early Reader · Change the reading level on the article