Central Idea
100
The Busy Honeybee
Honeybees are important pollinators that help plants grow. As they fly from flower to flower, they collect nectar and spread pollen, which helps plants produce fruit and seeds. A single bee can visit thousands of flowers in a day. Without bees, many plants would not be able to grow properly.
What is the central idea of the text?
A. Bees are dangerous insects.
B. Bees help plants grow by spreading pollen.
C. Bees eat flowers to survive.
D. Bees visit thousands of flowers each day.
B. Bees help plants grow by spreading pollen.
200
How Penguins Stay Warm
Penguins live in cold places, but they have special ways to stay warm. Their feathers are thick and waterproof, keeping the cold water away from their skin. Penguins also have a thick layer of fat under their skin that traps heat. When it's really cold, they huddle together in large groups to share body warmth. These adaptations help penguins survive in icy environments.
What is the central idea of the text?
A. Penguins stay warm in unique ways.
B. Penguins live in cold places with lots of fish.
C. Penguins can fly like other birds.
D. Penguins have thicker feathers that keep them warm.
A. Penguins stay warm in unique ways.
300
The Importance of Recycling
Recycling helps protect the environment by reducing waste. When people recycle paper, plastic, and metal, these materials can be used again instead of being thrown away. Recycling also helps save natural resources like trees and water. If more people recycle, there will be less trash in landfills and less pollution in the air and water.
What is the central idea of the text?
A. Recycling is very easy for most people to do.
B. Throwing away trash is better than recycling.
C. Recycling only works for plastic materials.
D. Recycling helps reduce waste and protect the environment.
D. Recycling helps reduce waste and protect the environment.
400
How Do Cacti Survive?
Cacti are plants that live in dry deserts, where there is very little water. Instead of leaves, they have spines that help keep animals from eating them. Cacti also store water in their thick stems, allowing them to survive long periods without rain. Some cacti can live for many years in the hot desert without needing much water at all.
What is the central idea of the text?
A. Cacti are common plants.
B. Cacti are able to survive in dry environments.
C. Cacti have spines to keep animals from eating them.
D. Cacti do not need a lot of water.
B. Cacti are able to survive in dry environments.
500
The Role of an Astronaut
Many people admire astronauts, but not many know what astronauts really do. Astronauts travel to space to explore and learn more about the universe. They conduct experiments, repair equipment, and study how living in space affects the human body. Astronauts must train for years to prepare for their missions. Astronauts work extremely hard. Their work helps scientists understand space and prepare for future space travel.
What is the central idea of the text?
A. Astronauts work in space to help scientists learn more about the universe.
B. Astronauts travel to explore the moon.
C. Astronauts do not need training before going to space.
D. Astronauts spend all their time in space.
A. Astronauts work in space to help scientists learn more about the universe.