Look at these details from a paragraph about skunks. Skunks use their claws when they fight. Skunks spray to chase other animals away. Skunks can bite hard with their sharp teeth. Choose the main idea that ties all the details together.

Look at these details from a paragraph about Wisconsin. Many Wisconsin cheeses are made from cow's milk. Wisconsin uses a lot of milk to make butter. Wisconsin uses milk to make different kinds of ice cream. Choose the main idea that ties all the details together.

Look at these details from a paragraph about maps. Sailors use maps to find their way at sea. Using maps, park rangers can help find lost hikers. Pilots can use maps to plan their flights. Choose the main idea that ties all the details together.

Look at these details from a paragraph about bird nests. Bird nests are sometimes seen on traffic lights. Bird nests have been spotted in old shoes. Some birds make nests in mailboxes. Choose the main idea that ties all the details together.

Look at these details from a paragraph about spiderwebs. Spiderwebs do not break in heavy winds. A spiderweb is powerful enough to catch and hold many insects. Spiderwebs can last through hard rain. Choose the main idea that ties all the details together.

Look at these details from a paragraph about baseball players. Baseball players have to run around bases quickly to score. Baseball players sometimes have to run to catch a ball hit into the air. Baseball players sometimes need to chase other players to tag them out. Choose the main idea that ties all the details together.

Look at these details from a paragraph about corn. It takes a lot of space for corn to grow well. A lot of water is needed to grow large ears of corn. Corn must get enough sunlight to grow tall. Choose the main idea that ties all the details together.

Look at these details from a paragraph about mirrors. People in Egypt used copper mirrors over three thousand years ago. Around 2000 BCE, people in Central America made mirrors from shiny stones. In 1835, Germans started making the first glass mirrors. Choose the main idea that ties all the details together.

Look at these details from a paragraph about . Sailboats are powered by the wind pushing against a sail. Motorboats are pushed forward by their motors. People use oars or paddles to row rowboats. Choose the main idea that ties all the details together.

Look at these details from a paragraph about trombones. You have to blow trombones hard for the horns to make music. Trombones have long slides that need to be moved to play notes. Strong arms are needed to hold the large trombone horns. Choose the main idea that ties all the details together.

Read the text. Learning from Pen Pals Pen pals are friends who live far apart but write letters to each other. It's exciting for pen pals to get letters in the mail from another city or country. More importantly, pen pals learn about each other's lives. They may share ideas about their families, pets, and favorite foods. They also may tell each other about special places and events in their towns. Through words and pictures, pen pals make each other's worlds a little bit bigger. What is the central idea (main idea) of the passage?

Read the passage. Smartphones a woman looking at a phone Smartphones are phones that are used for more than making calls and sending messages. People count on them for getting directions and finding information on the internet. People also have fun listening to music, taking pictures, and playing games on their phones. On the other hand, smartphones have some downsides. They can make it hard to keep your mind on important things, like studying. Some people even text during meals, or when spending time with their family. Driving while using a phone puts people in danger. Smartphones are useful, but they can cause problems if not used safely and politely. What is the main idea of the passage?

Read the passage. Baby Kangaroos a kangaroo with its baby A female kangaroo has a special fold of skin that forms a pouch. The pouch is like a large pocket on its stomach. When a baby kangaroo, or joey, is born, it climbs into its mother's pouch. At birth, a joey is only about one inch long. It needs to stay in the pouch so it can grow more. After several months, the joey has grown enough to leave the pouch for short periods of time. By the time the joey is ten months old, it is ready to leave the pouch for good. What is the main idea of the passage?

Read the passage. The Power of Exercise a woman stretching Why should you exercise? When you exercise, you lower your chances of getting sick. For example, exercise makes your heart healthier and your body stronger. It improves your mood and can make you feel calm. Regular exercise helps you think more clearly, so you can get more done during the day. Exercise can even help you sleep better at night. Regular exercise can make your life better in so many ways! What is the main idea of the passage?

Read the passage. What Would Life Be Like Without Gravity? an apple being tossed in the air Gravity is the force that makes things fall to Earth. You can't see or touch it, but without gravity, life on Earth would be quite different. Everything would simply float away. If you jumped up, you would fly off into space. If you threw a baseball, it would never come down. Gravity is also the force that keeps the Earth orbiting around the sun. So, without gravity, the Earth might float away, too. What is the main idea of the passage?

Read the passage. Wild West Boomtowns gold nuggets In 1848, a few builders discovered gold in California. Hearing the news, many people moved out West in a hurry. This push west for gold was called the Gold Rush. Thanks to the Gold Rush, small towns grew into big and busy ones almost overnight. These fast-growing towns were called boomtowns. Only a few people got rich searching for gold. Others made money by selling things like food and clothing to people in the boomtowns. What is the main idea of the passage?

Read the passage. It's Simple! It's Magic! white-gloved hands holding a black hat and a wand A good magic trick makes people believe they are seeing something amazing. But magic doesn't have to be hard to look real. One easy trick is to "bend" a spoon. First, hold the spoon's handle inside your hands with the end of the handle under your thumbs. Push the spoon's bowl down on the table. Next, let the handle slide down inside your hands. Since your hand is covering part of the handle, it will look like the spoon is bent. What is the main idea of the passage?

Read the passage. Pet Cats The cats we keep as pets today were once wild animals. Thousands of years ago, rats and mice followed humans, hoping to find scraps of food to eat. Wild cats wanted to hunt the rats and mice. So, they started spending more time around humans, too. The cats ate well, and the people were happy to have them killing pests. Later, cats were taken on ships to hunt the mice there, too. Sailors welcomed cats on board and brought them to other parts of the world. After some time, people were used to having cats around. They wanted to keep them as pets, not just hunters. What is the main idea of the passage?

Read the passage. Rabbits and Hares a brown hare Rabbits and hares are part of the same animal family. They both have long ears, short tails, large eyes, and strong teeth. Because they look so similar, rabbits and hares are often mistaken for each other. However, even though rabbits and hares look alike, they have different habits. Rabbits live in large family groups. On the other hand, hares mostly live alone. Rabbits live in underground tunnels and will run underground to hide. In contrast, hares live above the ground. The two animals even eat different kinds of foods. Rabbits like soft foods like grass, while hares prefer harder foods such as bark. What is the main idea of the passage?

Text 1 British mystery author Agatha Christie was part of a real-life mystery. In December of 1926, Christie went missing. Her car was found near a cliff. After eleven days, the famous author was found at a hotel. She had signed in under a false name. Her doctors suspected she suffered from a rare type of memory loss. Text 2 Agatha Christie was a famous British mystery writer. Christie published sixty-six novels and fourteen short-story collections. She also published one play. Her mystery novels have sold billions of copies, making her one of the best-selling writers of all time. Which sentence best combines the main ideas of both texts?