Nereididae
Ragworms live in the sea. They hide under rocks. They also live in sand. Birds like to eat them. They are very small. Can you find one in the sand?
Early Reader · Change the reading level on the articleLife Science articles — Page 84
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 84 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Nerium
The oleander is a pretty plant. It can grow into a small tree. It has pink or red flowers. These flowers grow in big groups. The plant is not safe to eat. Do not touch the sap. Do you like bright flowers?
Early Reader · Change the reading level on the articleNerve
Nerves are like tiny cables. They carry messages in your body. They tell your muscles to move. They also tell your brain how things feel. These cables help you every day. Do you know where your nerves are?
Early Reader · Change the reading level on the articleNest
Animals build nests. They use sticks and grass. Some nests are holes in the ground. Nests keep babies safe and warm. They help eggs stay in one place. Do you see a nest near you?
Early Reader · Change the reading level on the articleNettie Stevens
Nettie Stevens was a smart scientist. She looked at tiny worms. She found out why some are boys and some are girls. This helps us learn about life. Do you like to look at tiny things?
Early Reader · Change the reading level on the articleNeural network (biology)
Your brain has tiny parts. These parts talk to each other. They work like a big team. This team helps you think. It helps you learn new things. Can you feel your brain working?
Early Reader · Change the reading level on the articleNeurodegenerative disease
Some parts of the brain can get sick. These parts help us move and think. They may stop working well. This can make it hard to walk. We want to find ways to help. Do you want to learn more?
Early Reader · Change the reading level on the articleNeurolinguistics
Your brain helps you talk. It helps you hear words. It also helps you learn new ways to speak. This is a big job for your head. Scientists study how it works. Do you like to talk?
Early Reader · Change the reading level on the articleNeuroplasticity
Your brain can change. It grows when you learn new things. It can even fix itself. This helps you learn and remember. Your brain works hard for you. Do you want to learn something new today?
Early Reader · Change the reading level on the articleNeuroptera
Some bugs have wings like nets. They are soft and small. They have four wings. Some bugs hide in the sand. They wait for food. These bugs are very old. Do you like bugs?
Early Reader · Change the reading level on the articleNeurospora crassa
This is a red mold. It grows on old plants. It can grow in bakeries too. Scientists use it to learn. It helps us learn about life. Do you like to see mold?
Early Reader · Change the reading level on the articleNeurosurgery
Doctors help fix your brain. They work on your head and spine. They use special tools to help. This helps you feel better. It is very important work. Do you want to be a doctor?
Early Reader · Change the reading level on the articleNeurotoxin
{ "text":\"Some things can hurt your brain. They can hurt your nerves too. These things can come from plants or water. They can also be in some metals. Our bodies try to stay safe. Do you know how we stay safe?\",…
Early Reader · Change the reading level on the articleNeuston
Some tiny things live on water. They stay on the very top. They can be plants or animals. They help feed the birds. It is a busy place! Do you like to look at water?
Early Reader · Change the reading level on the articleNeutrophil
Tiny cells live in your blood. They help keep you well. They find bad germs. Then they eat them up. This helps your body stay strong. Can you feel them working?
Early Reader · Change the reading level on the articleNevus
A nevus is a mark on your skin. It can be a birthmark. Some marks are there when you are born. Others come later. Most of these marks are safe. Do you have a mark like this?
Early Reader · Change the reading level on the articleNew Mexico whiptail
This is a special lizard. It lives in dry places. It is brown with yellow stripes. It eats bugs and spiders. All of these lizards are girls. They can make babies on their own. Do you like lizards?
Early Reader · Change the reading level on the articleNewton Morton
Newton Morton loved science. He liked to find butterflies. Later, he studied how people grow. His work helped us learn. He was a great teacher. Do you like to look at bugs?
Early Reader · Change the reading level on the articleNew World barbet
These birds live in green forests. They have big heads. They eat fruit and bugs. They make homes in tree holes. They are bright and pretty. Can you see their colors? We love to watch them fly.
Early Reader · Change the reading level on the articleNew World quail
New World quails are small birds. They live on the ground. Some have pretty feathers on their heads. They like to walk and run. They eat seeds and bugs. Do you like birds?
Early Reader · Change the reading level on the articleNial O'Glacan
Nial was a doctor from Ireland. He helped many sick people. He traveled to many far places. He worked for a king, too. His work helped others learn. Do you want to be a doctor?
Early Reader · Change the reading level on the articleNiche construction
Animals can change their homes. A beaver builds a dam. This makes a new lake. This helps other living things. It is a big job! Do you like to build things too?
Early Reader · Change the reading level on the articleNicholas Miklouho-Maclay
Nicholas was a man who loved to travel. He went to far places. He lived with new friends in New Guinea. He helped people by being kind. He studied many plants and sea life. Do you like to explore?
Early Reader · Change the reading level on the articleNicobar pigeon
This is a big pigeon. It lives on small islands. Its feathers look green and shiny. It has a white tail. The tail helps the group fly together. Do you like shiny birds?
Early Reader · Change the reading level on the articleNicotinamide adenine dinucleotide
Tiny helpers live in all cells. They carry things inside you. They help your body work. This helps you stay well. We need them to grow. Do you feel strong today?
Early Reader · Change the reading level on the articleNigella sativa
This plant has small black seeds. People use the seeds in food. They add them to bread. They also add them to meat. It makes the food taste good. Do you like black seeds?
Early Reader · Change the reading level on the articleNigerian Dwarf
This is a small goat. It is a tiny breed. These goats can be many colors. They can even have blue eyes. They are very friendly animals. Do you like small goats?
Early Reader · Change the reading level on the articleNight heron
Some birds are called night herons. They like to hunt at night. They wait by the water for food. They eat small fish and frogs. These birds rest in trees during the day. It is fun to watch them! Can you see one?
Early Reader · Change the reading level on the articleNight monkey
Night monkeys live in the trees. They are awake at night. They have very big eyes. These eyes help them see in the dark. They like to eat fruit. Do you like to stay up late too?
Early Reader · Change the reading level on the articleNikolai Vavilov
Nikolai was a man who loved plants. He traveled far to find seeds. He wanted to help people have enough food. He made a big place to keep seeds safe. This helped us grow better crops. Do you like eating plants?
Early Reader · Change the reading level on the articleNile crocodile
The Nile crocodile is a big animal. It lives in Africa. It swims in rivers and lakes. It has very strong teeth. This helps it catch food. It is a very cool animal. Do you like crocodiles?
Early Reader · Change the reading level on the articleNile monitor
The Nile monitor is a big lizard. It lives near rivers in Africa. It can swim very well. It also likes to climb trees. This lizard is very strong. Do you like big lizards?
Early Reader · Change the reading level on the articleNile perch
The Nile perch is a big fish. It lives in many rivers. It is silver with blue color. This fish can grow very large. People catch it for food. It is a very strong fish. Do you like to eat fish?
Early Reader · Change the reading level on the articleNimravidae
These animals looked like cats. They lived a long time ago. Some had long teeth. They were not real cats. They were like fake cats. Do you like big cats?
Early Reader · Change the reading level on the articleNipah virus infection
A tiny germ can make people sick. It can come from bats or pigs. Some people feel a fever or a cough. We can stay safe by being clean. Do not touch sick animals. Can you stay healthy?
Early Reader · Change the reading level on the articleNitrogen fixation
Tiny living things help plants grow. They take things from the air. Then they turn them into food. This helps the soil stay good. This helps all life on Earth. Can you find a green plant?
Early Reader · Change the reading level on the articleNitrososphaeria
Tiny life lives in the sea. They live in the deep water. They help make food for others. They also help the air we breathe. These tiny things matter to us. Can you find them in the water?
Early Reader · Change the reading level on the articleNitrous oxide (medication)
Doctors use a special gas. It helps with pain. You breathe it in through a mask. It works very fast. It helps you feel better. Do you know what doctors use to help you?
Early Reader · Change the reading level on the articleNoctuidae
These are owlet moths. They live all over the world. Some are brown or grey. Some are very bright. Their babies are called caterpillars. They can eat many plants. They help flowers grow. Can you find a moth?
Early Reader · Change the reading level on the articleNodosauridae
These were armored dinosaurs. They had hard bumps on their skin. Some even had spikes. They ate plants for food. They lived a long time ago. Do you like dinosaurs?
Early Reader · Change the reading level on the articleNoise pollution
Loud sounds can be a problem. Machines and cars make much noise. This noise can hurt our ears. It can also make us feel bad. We must try to keep things quiet. Do you like quiet places?
Early Reader · Change the reading level on the articleNon-cellular life
Some tiny things are not like us. They do not have cells. They need a host to live. They can make more of themselves. These things are very small. They are right on the edge of life. Do you think they are alive?
Early Reader · Change the reading level on the articleNon-coding DNA
Our bodies have tiny parts called DNA. Most of our DNA does not make our bodies. It helps our cells work. It tells parts of us what to do. It is like a big book of rules. Do you want to learn more?
Early Reader · Change the reading level on the articleNon-coding RNA
Our tiny cells have many parts. Some parts help build our bodies. They work like small tools. These tools help cells stay healthy. They do many jobs. Do you wonder how they work?
Early Reader · Change the reading level on the articleNorfolk Black
This is a black turkey. It comes from a long time ago. These birds came to Britain from Spain. They are very old birds. We must help them stay safe. Do you like big birds?
Early Reader · Change the reading level on the articleNorovirus
Some germs make your tummy hurt. They can make you throw up. You might have a bad tummy ache. It helps to wash your hands well. Drinking lots of water is good too. Most people feel better in a few days. Do you wash…
Early Reader · Change the reading level on the articleNorth African elephant
A small elephant lived in Africa. It was not very big. People used them in old wars. They are gone now. We can see them in old art. Do you like elephants?
Early Reader · Change the reading level on the articleNorthern giraffe
The northern giraffe lives in Africa. It has long horns on its head. Some have three horns. These giraffes live in dry lands. We must help them stay safe. Do you like tall animals?
Early Reader · Change the reading level on the article