Earth and the Solar System · Term 3

The Moon's Phases

Students will observe and explain the predictable pattern of the Moon's phases.

About This Topic

In this topic, Grade 5 students expand their horizons to the entire solar system. They compare the characteristics of the eight planets, distinguishing between the inner rocky planets (Mercury, Venus, Earth, Mars) and the outer gas giants (Jupiter, Saturn, Uranus, Neptune). The Ontario curriculum emphasizes understanding the scale of the solar system and the unique conditions on each planet, such as atmosphere, temperature, and gravity.

Students also learn about other celestial bodies like asteroids, comets, and dwarf planets, and how technology like telescopes and space probes helps us explore these distant worlds. This unit is an excellent way to foster wonder and curiosity about the universe. It also allows for discussions about Canada's significant contributions to space exploration, such as the Canadarm and our astronauts. By comparing other planets to Earth, students gain a deeper appreciation for our planet's unique ability to support life.

This topic comes alive when students can create scale models to visualize the vast distances and size differences between planets.

Active Learning Ideas

Inquiry Circle: The Toilet Paper Solar System

Using a roll of toilet paper as a scale, students place 'planets' at specific distances (sheets) from a starting point (the Sun). This hands-on activity vividly demonstrates how close the inner planets are to each other compared to the massive gaps between the outer planets.

⏱ 45 min·Small Groups

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Gallery Walk: Planet Travel Brochures

Each group is assigned a planet and creates a 'travel brochure' highlighting its features, such as gravity, temperature, and what a 'tourist' would need to survive there. Students rotate to 'book their next vacation,' learning the unique properties of each planet from their peers.

⏱ 60 min·Small Groups

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Think-Pair-Share: The Gravity Jump

Provide a chart showing the gravity on different planets. Ask: 'If you can jump 30cm on Earth, how high could you jump on Jupiter versus the Moon?' Students calculate and discuss in pairs how mass affects gravity and how that would change their daily lives on another world.

⏱ 20 min·Pairs

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Watch Out for These Misconceptions

Common Misconception

The planets are all about the same distance apart.

What to Teach Instead

Most diagrams in books show planets evenly spaced to fit on the page. Teachers should use a scale model activity to show that the outer solar system is much, much larger than the inner part. Seeing the 'empty space' in a hallway or playground model is the best way to correct this.

Common Misconception

Gas giants are like big clouds you could fly through.

What to Teach Instead

Students often think 'gas' means 'empty.' Teachers should explain that while they don't have a solid surface like Earth, the pressure and density of the gases become so intense deep down that they behave more like liquids or solids. A 'pressure' analogy helps students understand these massive structures.

Frequently Asked Questions

What is the main difference between inner and outer planets?

The four inner planets (Mercury, Venus, Earth, Mars) are small, rocky, and have few or no moons. The four outer planets (Jupiter, Saturn, Uranus, Neptune) are massive, made mostly of hydrogen and helium gas or ice, have many moons, and all have ring systems.

Why is Pluto no longer considered a planet?

In 2006, scientists redefined what a 'planet' is. To be a planet, an object must orbit the Sun, be round, and have 'cleared its neighborhood' of other objects. Because Pluto shares its orbit with many other objects in the Kuiper Belt, it was reclassified as a 'dwarf planet.'

How can active learning help students understand the scale of space?

Space is too big to imagine. Active learning strategies like building a scale model in a long hallway or a playground allow students to physically walk the distances between planets. This kinesthetic experience of 'walking for a long time' to reach Neptune vs. a few steps to reach Venus makes the abstract concept of 'vastness' real.

What has Canada contributed to the study of the solar system?

Canada is a world leader in space robotics, most famously with the Canadarm and Canadarm2 used on the Space Shuttle and International Space Station. We also provide sensors for Mars rovers and contribute to international satellite missions that help us understand the planets and monitor Earth's environment.

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