Dall's porpoise
This is a big porpoise. It lives in the cold ocean. It is mostly black and white. It swims very fast. It makes a spray of water. Do you like to swim too?
Early Reader · Change the reading level on the articleLife Science articles — Page 51
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 51 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Damselfish
Damselfish are small fish. They live in warm water. They like to hide in rocks. They eat tiny things in the sea. These fish are very busy. Do you like to watch fish?
Early Reader · Change the reading level on the articleDaniel David Palmer
A man named Daniel started a new way to help bodies. He thought moving the back could help people feel well. He taught many others how to do this. This work is still used today. Do you know a doctor?
Early Reader · Change the reading level on the articleDaniel Lambert
Daniel Lambert was a very large man. He lived a long time ago. He was very strong and liked animals. He was a kind man to people. He was famous for his size. Can you imagine being that big?
Early Reader · Change the reading level on the articleDanionin
These are small fish. They live in fresh water. Some have bright colors. They have spots or stripes. Many live in Asia. You can see them in tanks. Do you like colorful fish?
Early Reader · Change the reading level on the articleD'Arcy Wentworth Thompson
D'Arcy was a man who loved nature. He studied how animals look. He used math to help him. He saw patterns in plants and fish. This helps us learn about our world. Do you like to look for patterns?
Early Reader · Change the reading level on the articleDarwin's finches
These are special birds. They live on islands. They have many different beaks. Some beaks are big. Some beaks are small. The beaks help them eat food. Do you like birds?
Early Reader · Change the reading level on the articleDarwin's frog
This is a special frog. It lives in the rain forest. The daddy frog carries the babies in his throat. He keeps them safe there. This helps the babies grow. Do you like frogs?
Early Reader · Change the reading level on the articleDaughter
A daughter is a girl in a family. She is the child of a mother and father. A son is a boy. A daughter is a girl. We all belong to a family. Do you have a sister?
Early Reader · Change the reading level on the articleDavid Ausubel
David was a man who studied minds. He wanted to help kids learn. He said we learn from what we know. This helps new ideas stick. It makes school fun for you. Do you like to learn new things?
Early Reader · Change the reading level on the articleDavidson Black
A man named Davidson Black found old bones. He looked for them in China. These bones were from long ago. They helped us learn about people. He worked very hard. Do you like to look for old things?
Early Reader · Change the reading level on the articleDavid Vetter
A boy named David lived in a bubble. This bubble kept him safe. It kept tiny germs away. He lived a very different life. His family loved him very much. Can you imagine living in a bubble?
Early Reader · Change the reading level on the articleDavid Wechsler
David Wechsler was a smart man. He helped people learn. He made tests to see how we think. These tests help us understand our minds. His work still helps us today. Do you like to learn new things?
Early Reader · Change the reading level on the articleDead leaf mantis
Some bugs look like dry leaves. They hide in the trees. This helps them stay safe. It is a fun trick to see. Can you find one?
Early Reader · Change the reading level on the articleDeafness
Some people cannot hear sounds. They may use sign language to talk. They may use tools to help them hear. These tools can be small. Some tools even use bright lights. It is a special way to live. Do you know sign…
Early Reader · Change the reading level on the articleDeathstalker
The deathstalker is a yellow scorpion. It lives in hot deserts. Its sting can hurt a lot. We must be careful around it. It is a very special animal. Have you ever seen a scorpion?
Early Reader · Change the reading level on the articleDebridement
Doctors help boo-boos heal. They take away bad skin. This helps good skin grow back. It can help a burn. It can help a bite. It helps you feel better. Can you imagine that?
Early Reader · Change the reading level on the articleDecapitation
A head can be lost from a body. This can happen by accident. It can also be a way to punish people. This is a very sad thing. It stops the body from working. Do you see how much the body needs its head?
Early Reader · Change the reading level on the articleDecomposer
Some tiny things help the earth. They break down dead things. This makes good food for plants. It helps plants grow big and strong. We need them to stay healthy. Do you like to look at plants?
Early Reader · Change the reading level on the articleDeep-sea community
Many animals live in the deep sea. It is very dark down there. It is also very cold. Some fish live in the dark. They find food in new ways. It is a busy place! Can you imagine living there?
Early Reader · Change the reading level on the articleDe-extinction
Some animals are gone. People want to bring them back. They use special ways to do this. It can help our world. Do you think it is a good idea?
Early Reader · Change the reading level on the articleDefibrillation
A machine helps a heart beat. It gives the heart a small shock. This helps the heart find its way. It can help people stay well. It is a very helpful tool. Do you want to learn more?
Early Reader · Change the reading level on the articleDefoliant
Some sprays make leaves fall off. This helps pick crops like cotton. It can also kill weeds in a yard. We must use these sprays with care. They can hurt the water or animals. Do you see leaves on your trees?
Early Reader · Change the reading level on the articleDehydration
Your body needs water to work. You lose water when you sweat. You also lose water when you breathe. It is important to drink water. This keeps you feeling good. Do you drink enough water?
Early Reader · Change the reading level on the articleDeinocheirus
This was a big dinosaur. It had very long arms. It also had big claws. It ate plants and fish. It lived a long time ago. Do you like big dinosaurs?
Early Reader · Change the reading level on the articleDeinonychus
A dinosaur called Deinonychus lived long ago. It was fast and strong. It had a big, sharp claw on its foot. This helped it hunt for food. It might have had soft feathers too. Can you imagine seeing one?
Early Reader · Change the reading level on the articleDeinosuchus
A giant lived long ago. It looked like an alligator. It was very, very big. It had strong teeth for eating. It lived in the water. Do you think it was scary?
Early Reader · Change the reading level on the articleDeinotheriidae
These animals looked like big elephants. They had long legs. They had special teeth for eating plants. Their bottom teeth curved down like hooks. They were very large. They lived a long time ago. Can you imagine…
Early Reader · Change the reading level on the articleDeinotherium
A long time ago, there lived a big animal. It looked like a large elephant. It had long teeth that grew down from its chin. These animals liked to eat leaves. They were very, very big. Do you think you could see one?
Early Reader · Change the reading level on the articleDéjà vu
Have you felt something before? It feels like you are in a dream. You might think you saw it once. But you did not! Your brain is just playing a trick. It is a funny feeling. Have you felt this too?
Early Reader · Change the reading level on the articleDelichon
These are small birds. They are blue and white. They build nests out of mud. They eat tiny bugs in the air. They live in many places. Do you like to watch birds?
Early Reader · Change the reading level on the articleDeltoid muscle
The deltoid is a muscle. It is on your shoulder. It makes your shoulder look round. It helps you lift your arm. It helps you move your arm fast. Can you lift your arm up high?
Early Reader · Change the reading level on the articleDemersal fish
Some fish live on the bottom. They stay near the sand or rocks. They look for food in the mud. This helps them eat. They are very good at hiding. Can you find them?
Early Reader · Change the reading level on the articleDemoiselle crane
The demoiselle crane is a tall bird. It is a small crane. It likes to dance and play. These birds fly to warm places in winter. They can be very graceful. Do you like to dance too?
Early Reader · Change the reading level on the articleDemosponge
Sponges live in the sea. They come in many shapes. Some are very big. Some are bright colors. They can live a long time. We use some for baths. Do you like sponges?
Early Reader · Change the reading level on the articleDendrite
Small parts in your body talk to each other. These parts look like tiny trees. They catch messages from other cells. This helps your body work well. It is very cool! Do you have tiny trees in your brain too?
Early Reader · Change the reading level on the articleDendritic cell
Some tiny cells help your body. They act like little messengers. They find germs in your skin. Then they tell your body to fight. This keeps you healthy. Can you stay strong?
Early Reader · Change the reading level on the articleDendrochronology
Trees have lines inside them. Each line is one year. These lines show how old a tree is. They also tell us about the weather. We can learn from the wood. Can you see the lines in a tree?
Early Reader · Change the reading level on the articleDental avulsion
Sometimes a tooth can fall out. This can happen if you fall. You must see a dentist fast. They can help put it back. A dentist can help you. Have you ever lost a tooth?
Early Reader · Change the reading level on the articleDental braces
Braces help make teeth straight. They use small parts to push teeth. This helps your teeth fit well. They can even be clear. Braces can help you smile. Do you have straight teeth?
Early Reader · Change the reading level on the articleDental extraction
A dentist can pull a tooth. This helps if a tooth hurts. It can also make room for new teeth. The dentist makes the area numb first. Then, they use tools to lift the tooth out. Have you ever lost a tooth?
Early Reader · Change the reading level on the articleDental floss
Floss is a thin string. It cleans your teeth. It gets in small spots. A brush cannot reach there. It helps keep your mouth healthy. Do you floss your teeth?
Early Reader · Change the reading level on the articleDental implant
A dentist can help you. They use a tiny screw. It goes into your bone. This helps hold a new tooth. It makes your smile strong. Do you like to smile?
Early Reader · Change the reading level on the articleDental plaque
Tiny germs live in your mouth. They make a sticky layer. This layer can stay on your teeth. It can hurt your teeth and gums. We must brush them away every day. Do you brush your teeth?
Early Reader · Change the reading level on the articleDentist
A dentist helps your mouth. They look at your teeth. They also look at your gums. They keep your smile bright. This helps you stay healthy. It is good to visit them. Do you brush your teeth?
Early Reader · Change the reading level on the articleDentition
Your teeth help you eat. They come in many shapes. Some teeth cut your food. Some teeth grind your food. This helps us stay strong. Do you have baby teeth?
Early Reader · Change the reading level on the articleDeodorant
Some things help us smell good. They stop smells from our skin. We put them in our armpits. They help us stay fresh. It is a smart way to feel clean. Do you use them?
Early Reader · Change the reading level on the articleDeoxyribose
A tiny sugar is in you. It is in your DNA. DNA helps your body grow. This sugar is very small. It helps your DNA stay soft. It is part of life. Do you like science?
Early Reader · Change the reading level on the article