Northern mockingbird
This bird is a mockingbird. It can copy many sounds. It can even copy noises from machines! It eats fruit and bugs. It is a very smart bird. Do you like to sing songs?
Early Reader · Change the reading level on the articleLife Science articles — Page 85
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 85 of 116
Explore related Science Lab activities about plants, animals and ecosystems or the human body, each at five reading levels.
Northern pintail
The pintail is a large duck. It has a long tail. The male has a brown head. The female is brown too. They swim in shallow water. They eat plants and bugs. Can you see the long neck?
Early Reader · Change the reading level on the articleNorthern shoveler
This duck has a big bill. It looks like a spoon. The bird swims in circles. It finds food in the water. It is a very busy bird. Do you like ducks?
Early Reader · Change the reading level on the articleNorthern storm petrel
These are tiny sea birds. They live on the big ocean. They eat small fish and snacks. They fly like little bats. These birds are very cute. Do you like birds?
Early Reader · Change the reading level on the articleNosebleed
Sometimes your nose may bleed. This can happen if you pick your nose. It can also happen if the air is dry. Most nosebleeds stop on their own. You can pinch your nose to help. Have you ever had a nosebleed?
Early Reader · Change the reading level on the articleNostril
You have two holes in your nose. They help you breathe air. Tiny hairs inside keep you safe. They stop dust from going in. We use them to smell things, too. Can you smell a flower?
Early Reader · Change the reading level on the articleNothofagus
These are special trees. They live far away. They grow in many places. These trees can be very old. They help make big forests. Do you like trees?
Early Reader · Change the reading level on the articleNothofagus fusca
The red beech is a tall tree. It grows in New Zealand. The tree stays green all year. Its wood is very strong. People use it for floors. It is a lovely tree. Do you like trees?
Early Reader · Change the reading level on the articleNothofagus menziesii
The silver beech is a tree. It grows in New Zealand. It can live for a very long time. Its bark is a pretty silver color. It is a special treasure. Can you find a silver tree?
Early Reader · Change the reading level on the articleNothosaurus
A long ago animal lived in the sea. It was a large reptile. It had long toes with skin between them. It used its tail and feet to swim. It used its teeth to catch fish. Can you swim like a sea animal?
Early Reader · Change the reading level on the articleNotonectidae
Some bugs swim on their backs. They are called backswimmers. They live in ponds and lakes. They hunt for food in the water. These bugs can even fly! Do you want to find one?
Early Reader · Change the reading level on the articleNotopteridae
Some fish look like long knives. They live in warm water. They swim by moving a long fin. This helps them move back and forth. Some fish even guard their eggs. Can you find a picture of one?
Early Reader · Change the reading level on the articleNotostraca
These little bugs look like tadpoles. They live in shallow water. They have many tiny legs. These bugs have been around a long time. They eat small things on the bottom. Can you find them in a pond?
Early Reader · Change the reading level on the articleNotosuchia
These were old kinds of crocs. They lived on dry land. Some had hard skin like an armadillo. Some had snouts like a duck. They ate plants and meat. They were very special. Do you like old bones?
Early Reader · Change the reading level on the articleNotoungulata
Some old animals lived in South America. They looked like many things. Some were small like rabbits. Some were big like rhinos. They lived a long time ago. Do you like old animals?
Early Reader · Change the reading level on the articleNuclear envelope
A tiny wall holds the center of a cell. This wall has many small holes. They let things move in and out. This wall helps keep the cell safe. It is very small. Can you imagine something so tiny?
Early Reader · Change the reading level on the articleNuclear medicine
Doctors use special tools to see inside you. They use tiny bits of light. These bits show how your body works. It helps them find where you are sick. This helps you get well. Can you imagine seeing inside your body?
Early Reader · Change the reading level on the articleNuclear transfer
Scientists can make a copy of a living thing. They take a tiny part from one cell. They put it into a new egg. This can help make a new animal. It worked for a sheep named Dolly. Do you think that is neat?
Early Reader · Change the reading level on the articleNucleic acid structure
Tiny parts make up your body. These parts look like long twists. They hold many secrets about you. They help you grow every day. It is like a tiny book. Do you want to learn more?
Early Reader · Change the reading level on the articleNucleolus
A tiny part lives in your cells. It helps make things your body needs. It makes small parts that help you grow. This part is very important for life. We need it to stay well. Do you have tiny parts in you too?
Early Reader · Change the reading level on the articleNucleotide
Tiny bits make up your body. These bits build your DNA. They also give you energy. You get them from food. Your body can make them too. They help you grow. Do you want to learn more?
Early Reader · Change the reading level on the articleNudibranch
Sea slugs are bright and pretty. They live in the salt sea. They do not have shells. Some look like little dragons. They can be many colors. Can you find one in the water?
Early Reader · Change the reading level on the articleNumbat
The numbat is a small animal. It has stripes on its back. It likes to eat tiny bugs. These bugs help it stay full. The numbat lives in Australia. It is a special friend to see. Do you like stripes?
Early Reader · Change the reading level on the articleNuthatch
Nuthatches are small birds. They live in trees. They can climb down trunks upside-down. They use strong bills to eat nuts. This helps them find food. Do you like birds?
Early Reader · Change the reading level on the articleNutrient
Food helps us live. It helps us grow big. It also helps us stay strong. All living things need it. Plants and animals need it too. Do you like to eat healthy food?
Early Reader · Change the reading level on the articleNyctereutes
These animals live in Asia. They look like small dogs. They eat fish and birds. They also eat roots from the ground. These animals can change what they eat. They are very clever. Do you like dogs?
Early Reader · Change the reading level on the articleNymphaea
Water lilies live in the water. Their leaves float on top. They have pretty flowers too. These plants help shade the pond. They are very nice to see. Do you like water lilies?
Early Reader · Change the reading level on the articleNymphaeaceae
Water lilies are pretty plants. They live in the water. Their leaves float on top. Their flowers grow too. They help the water look nice. Do you like seeing them?
Early Reader · Change the reading level on the articleNymphaea nouchali var. caerulea
This is a blue water lily. It lives in lakes and rivers. Its leaves float on the water. Long ago, kings loved these flowers. They are very pretty to see. Do you like blue flowers?
Early Reader · Change the reading level on the articleNymphaea thermarum
This is a tiny water lily. It lives in warm water. The plant has small white flowers. It was almost gone forever. Now we found more of them! Can you find a flower?
Early Reader · Change the reading level on the articleNymphalidae
Many butterflies are in this group. They have bright wings. They use only four legs to stand. Their other two legs are small. Some look like dead leaves. Can you find a butterfly?
Early Reader · Change the reading level on the articleNypa fruticans
The nipa palm grows by the sea. Its trunk stays under the mud. Only the leaves grow up. The seeds float on the water. They can grow in new places. People use the leaves for roofs. Do you like to see plants by the ocean?
Early Reader · Change the reading level on the articleOakmoss
Oakmoss is a tiny plant. It grows on tree bark. It looks like small, bushy clumps. It can smell sweet and woody. People use it to make perfume. Do you like sweet smells?
Early Reader · Change the reading level on the articleObstructive shock
Your blood moves in a loop. Sometimes something blocks the way. This can make it hard to breathe. It can also make you feel weak. Doctors work fast to help. Can you imagine how much your heart works?
Early Reader · Change the reading level on the articleOccipital lobe
Your brain helps you see. This part is at the back of your head. It looks at colors and shapes. It tells you where things are. It is very important for your eyes. Do you like to look at bright colors?
Early Reader · Change the reading level on the articleOccupational injury
Some people get hurt at work. This can happen to hands or backs. It can happen from falls. People use tools to stay safe. We want everyone to be okay. Do you know about safety rules?
Early Reader · Change the reading level on the articleOccupational medicine
Some doctors help people at work. They keep workers safe and well. They help if someone gets hurt. This helps everyone stay strong. It is a very good job. Do you want to be a doctor?
Early Reader · Change the reading level on the articleOceanic dolphin
Dolphins live in the sea. They swim very fast. They use sounds to find things. They eat fish and squid. Mothers care for their babies. Do you like dolphins?
Early Reader · Change the reading level on the articleOcean surface ecosystem
Many things live on the ocean surface. Some float like tiny islands. Seaweed and snails stay on top. Fish eat these small things. This helps all the sea life. It is a busy place! Can you see them?
Early Reader · Change the reading level on the articleOcellated turkey
This bird is a turkey. It has green and bronze feathers. It has blue spots on its tail. These spots look like eyes. It lives in warm lands. Do you like bright colors?
Early Reader · Change the reading level on the articleOcelot
The ocelot is a wild cat. It has many spots. It lives in the forest. It likes to swim and climb trees. It hunts at night. Can you see its spots?
Early Reader · Change the reading level on the articleOchetellus glaber
This ant is very small. It is black or brown. It likes to live in trees. It can also live in your home. It looks for food to eat. Do you see ants near you?
Early Reader · Change the reading level on the articleOcimum tenuiflorum
This plant is holy basil. It has a strong smell. The leaves can be green or purple. People use it in tea. It also goes in tasty food. Do you like plants that smell good?
Early Reader · Change the reading level on the articleOctodon
Some small animals live in the mountains. They are called degus. They have gray fur and big ears. They live in tunnels in the ground. These animals like to eat plants. Do you like to dig in the dirt?
Early Reader · Change the reading level on the articleOdobenocetops
This was a small whale. It lived in the sea long ago. It had two long tusks. These tusks looked like big teeth. The whale used its mouth to suck up food. Can you imagine a whale with tusks?
Early Reader · Change the reading level on the articleOilbird
This bird flies at night. It lives in dark caves. It eats sweet fruit for food. It makes loud clicking sounds to find its way. This helps the bird fly in the dark. Do you like to fly in the dark?
Early Reader · Change the reading level on the articleOkapi
The okapi is a special animal. It lives in the deep woods. It has stripes like a zebra. These stripes help it hide. It has a very long tongue for eating. Do you like stripes?
Early Reader · Change the reading level on the articleOkapi Wildlife Reserve
Many animals live in a big forest. It is a safe home for okapis. They live near big trees and rivers. This place helps many birds and apes. We must help keep it safe. Do you like animals?
Early Reader · Change the reading level on the article