Disaccharide
Some sugars are made of two parts. These parts join together. They can come from milk or cane. This helps our bodies work. We eat these sugars for food. Do you like sweet things?
Early Reader · Change the reading level on the articleLife Science articles — Page 53
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 53 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Disappointment
Sometimes things do not go as we hoped. This feeling is called disappointment. It can make us feel sad. It might last a few minutes or a few days. We all feel this way sometimes. Have you ever felt this way?
Early Reader · Change the reading level on the articleDisc herniation
Your back has soft pads. These pads sit between bones. Sometimes a pad gets a small tear. The soft middle can bulge out. This can make your back hurt. Do you sit up tall?
Early Reader · Change the reading level on the articleDisease vector
Some bugs carry tiny germs. They bite us to eat. The germs move from the bug to you. This can make you sick. We must stay safe. Do you see bugs near you?
Early Reader · Change the reading level on the articleDistributive shock
Sometimes blood does not go to the right spots. It can get stuck in small paths. This makes it hard for your body to work. Doctors help fix this. It is good to stay healthy. Can you stay strong?
Early Reader · Change the reading level on the articleDisturbance (ecology)
Sometimes, things in nature change fast. A big fire can change a forest. A storm can change a field. These changes help new plants grow. This helps many animals find food. Nature is always changing. Can you see…
Early Reader · Change the reading level on the articleDivergent evolution
Animals can change over a long time. Some groups move to new places. They find new food to eat. This makes them look different. A dog and a wolf are like this. Do you see how they are the same?
Early Reader · Change the reading level on the articleDiverticulitis
Sometimes your tummy can hurt. Small bumps can grow in your gut. These bumps can get red and sore. This can make you feel sick. It might hurt your belly. A doctor can help you feel better. Does your tummy ever feel…
Early Reader · Change the reading level on the articleDiving duck
Some ducks like to dive. They go deep under the water. They do this to find food. Their legs help them swim fast. They do not walk well on land. Do you like to swim like them?
Early Reader · Change the reading level on the articleDizziness
Sometimes your head feels funny. You might feel like you are spinning. You might feel off balance. This can happen to many people. It can make you feel sick. It is okay to rest. Have you ever felt this way?
Early Reader · Change the reading level on the articleDmanisi hominins
Long ago, people lived in a new place. They lived near a big lake. They used stones as tools. We found their old bones in the dirt. These bones help us learn about them. Can you imagine living so long ago?
Early Reader · Change the reading level on the articleDmitri Ivanovsky
Dmitri was a plant scientist. He looked at sick plants. He found tiny things that make plants ill. These things are too small to see. They help us learn about life. Can you find tiny things with a lens?
Early Reader · Change the reading level on the articleDNA ligase
Inside you, things are being fixed. Small parts act like glue. They join broken pieces back together. This helps your body stay strong. It is like a tiny repair kit. Do you have a repair kit at home?
Early Reader · Change the reading level on the articleDNA microarray
Scientists use a tiny chip. It has many small spots. These spots hold tiny bits of life. They help us learn about our bodies. This helps us stay healthy. Do you want to see more?
Early Reader · Change the reading level on the articleDNA polymerase
Tiny workers make copies of your life. They build new parts for your body. They read the old parts to know what to do. This helps you grow every day. It is like magic! Can you imagine being so small?
Early Reader · Change the reading level on the articleDNA repair
Our tiny cells have a plan. This plan can get broken. The sun or air can hurt it. Our cells work hard to fix it. This keeps us healthy. Do you want to learn more?
Early Reader · Change the reading level on the articleDNA sequencing
Everything alive has a tiny code. This code is in your body. It tells your body how to grow. We can read this code to help people stay well. It can even help us find old animals. Do you want to learn more?
Early Reader · Change the reading level on the articleDoctor's office
A doctor's office helps you stay well. You go there when you feel sick. The doctor checks your body. They may check how tall you are. It is a safe place to go. Do you feel better after a visit?
Early Reader · Change the reading level on the articleDog crossbreed
Some dogs have two different kinds of parents. These dogs are called crossbreeds. They can look very different. Some are good for work. Others are sweet pets. Do you have a mixed dog?
Early Reader · Change the reading level on the articleDog flea
A flea is a tiny bug. It lives on dogs and cats. It can jump very high. The bug can make pets itchy. We must keep pets clean. It is good to help our pets. Do you have a pet?
Early Reader · Change the reading level on the articleDolly (sheep)
Dolly was a very special sheep. She was made from one cell. This was a big surprise. Scientists learned a lot from her. She helped us learn about life. Do you like sheep?
Early Reader · Change the reading level on the articleDolomedes
Some spiders live near water. They can run on top of a pond. They use their legs to feel for food. They can even catch small fish! These spiders are very cool. Can you find one near a stream?
Early Reader · Change the reading level on the articleDomesticated hedgehog
A hedgehog can be a pet. They are small and cute. They like to eat bugs. They need a wheel to run. This keeps them healthy. Do you like small pets?
Early Reader · Change the reading level on the articleDomesticated quail
Some birds are called quails. They are small birds. People keep them in cages. They can give us eggs. Some even make good pets. Do you like birds?
Early Reader · Change the reading level on the articleDomestication of the horse
Long ago, horses were wild. They lived in the wild. People used them to travel. Horses helped us do work. They are very helpful. Do you like horses?
Early Reader · Change the reading level on the articleDomestic canary
The canary is a small bird. It has a pretty song. Many canaries are bright yellow. They can live in a cage. They like to eat seeds. They are fun to watch. Do you like birds?
Early Reader · Change the reading level on the articleDomestic duck
Ducks live on many farms. They give us eggs to eat. Some ducks also give us meat. They like to swim in water. They can even help grow rice. We can see them in books. Do you like ducks?
Early Reader · Change the reading level on the articleDomestic goose
A goose is a big bird. People keep them as pets. They also keep them for food. Some geese have white feathers. They can lay many eggs. They are very loud too. Do you like geese?
Early Reader · Change the reading level on the articleDomestic pigeon
Pigeons are birds that live with us. They can be pets. They can also carry notes. Long ago, people used them as messengers. Some pigeons look very fancy. Do you see pigeons in your city?
Early Reader · Change the reading level on the articleDominance (genetics)
Some traits hide from us. One trait can cover another. This makes one look stronger. It is like a loud voice. The other trait stays quiet. Do you see this in plants? Can you find it?
Early Reader · Change the reading level on the articleDonald Winnicott
Donald was a doctor for kids. He helped many babies. He thought love is very good. It helps kids grow up well. Do you like to play with toys?
Early Reader · Change the reading level on the articleDorcatherium
A long time ago, these animals lived. They lived in many far places. They liked to eat fruit. This helped them grow. They are gone now. Do you like fruit too?
Early Reader · Change the reading level on the articleDormancy
Some living things take a long rest. They stop growing for a while. This helps them save energy. It can be very cold outside. This rest helps them stay safe. Do you ever rest like that?
Early Reader · Change the reading level on the articleDorudon
The Dorudon was a small whale. It lived in warm seas. It ate small fish. This whale lived a long time ago. It is fun to learn about old animals. Do you like whales?
Early Reader · Change the reading level on the articleDosage form
Medicine comes in many ways. It can be a pill. It can be a drink. It can even be a cream for your skin. This helps you feel better. How do you take your medicine?
Early Reader · Change the reading level on the articleDowitcher
The dowitcher is a bird. It has a long beak. It lives near wet marshes. These birds fly a long way. They look like other birds too. It is fun to see them! Do you like birds?
Early Reader · Change the reading level on the articleDPT vaccine
A shot helps keep us safe. It stops three bad germs. These germs can make you sick. The shot helps your body fight. It is a good way to stay well. Do you like to stay healthy?
Early Reader · Change the reading level on the articleDracaena (plant)
Dracaena are special plants. Some look like big trees. Some have leaves on the ground. They grow in warm places. Many people keep them in homes. They are very pretty. Do you like plants?
Early Reader · Change the reading level on the articleDracaena trifasciata
This is a snake plant. It has long, stiff leaves. The leaves look like snakes. It can live in your house. It does not need much water. It is a tough plant! Do you like plants?
Early Reader · Change the reading level on the articleDraco (lizard)
Some lizards can glide through the air. They use skin like wings to fly. These wings help them move in the trees. They eat small bugs for food. It is fun to watch them go! Can you see them glide?
Early Reader · Change the reading level on the articleDracunculiasis
Small worms can live in water. You can get sick if you drink it. The worm makes a sore on your leg. It takes a long time to leave. We use filters to keep water clean. This helps everyone stay well. Can you help keep…
Early Reader · Change the reading level on the articleDraft horse
These are very big horses. They are very strong. They pull heavy things for us. They help on farms. They are very calm too. Do you like big horses?
Early Reader · Change the reading level on the articleDragonet
Dragonets are small fish. They live on the sandy bottom. They have many bright colors. Some have very long fins. They hide in the sand to stay safe. Do you like bright colors? Can you find a fish in the sand?
Early Reader · Change the reading level on the articleDressing (medicine)
A dressing is a soft pad. It goes on a boo-boo. It helps the skin heal. It keeps germs away. This helps you feel better. Have you ever worn one?
Early Reader · Change the reading level on the articleDromaeosauridae
Some dinosaurs had soft feathers. They were fast runners. They had big claws on their toes. These claws helped them catch food. They look a lot like birds. Do you like dinosaurs?
Early Reader · Change the reading level on the articleDromiidae
Some crabs use sponges as homes. They pick a piece of sponge. They use claws to shape it. They hold it on their backs. The sponge grows with the crab. It is a safe house. Do you like to hide?
Early Reader · Change the reading level on the articleDromornis
These were very big birds. They lived in Australia. They could not fly. They had big legs for running. They ate plants for food. They were giant! Can you imagine a bird that big?
Early Reader · Change the reading level on the articleDrongo
The drongo is a dark bird. It has a split tail. These birds eat bugs. They can make fake sounds to trick others. This helps them get food. Do you like birds?
Early Reader · Change the reading level on the article