Science – Reading Comprehension Passages for Grade 4

You can find about “The Water Cycle”, “The Human Heart”, “The Moon”, “The Solar System” and Photosynthesis reading comprehension.  This is a good start for Grade 4 and good reading for 3rd graders.

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You can also find the reading passages here.

The Moon
The Moon is Earth’s only natural satellite. It is about one-quarter the size of Earth and orbits around our planet about once every 27.3 days. The Moon has no atmosphere or water, and its surface is rocky and dusty. It is also home to many craters, mountains, and valleys.

The Solar System

The Solar System consists of the Sun and all the objects that orbit around it, including planets, dwarf planets, moons, asteroids, comets, and other celestial bodies. There are eight planets in our Solar System, and they are divided into two main categories: the inner planets (Mercury, Venus, Earth, and Mars) and the outer planets (Jupiter, Saturn, Uranus, and Neptune). The Solar System is located in the Milky Way galaxy.

The Water Cycle

The water cycle is the continuous process by which water moves from the Earth’s surface to the atmosphere and back again. Water evaporates from the Earth’s surface and forms clouds in the atmosphere. The clouds then move across the sky and release their water back onto the Earth’s surface as precipitation, such as rain or snow. The water cycle is important for maintaining the balance of water on Earth and for supporting life.

Photosynthesis

The water cycle is the continuous process by which water moves from the Earth’s surface to the atmosphere and back again. Water evaporates from the Earth’s surface and forms clouds in the atmosphere. The clouds then move across the sky and release their water back onto the Earth’s surface as precipitation, such as rain or snow. The water cycle is important for maintaining the balance of water on Earth and for supporting life.

The human heart

The human heart is a muscular organ located in the chest that pumps blood throughout the body. It has four chambers: the left and right atria, and the left and right ventricles. The heart is divided into two halves by a muscular wall called the septum. The right side of the heart pumps oxygen-poor blood to the lungs, where it is oxygenated, and the left side pumps oxygen-rich blood to the rest of the body.