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Lesson 6

 Earth Comparisons

Learning Objective:

• Students will get a chance to compare things that are greater than, less than, or equal to.
• Students will compare the Earth to other planets.
• Students will list planets according to the greatest size to the smallest size.

Year 7

Activity:

Move the class in groups of 4-6 students. Let students brainstorm of what kind of objects could the compare that are in the classroom. Some suggestions: get a collection of pencils, crayons, shoes, the tallest student to the shortest and so on. Let each group rank the items from smallest to largest, (less than to greater than). Have each group tell the class why they came up with the answers they got or have each student write their answers of why their group got what they got.

Next let each student or group go to Cyber Astronomy (http://www3.wx.js.cn/collect/sun/index.html) where they can look up and compare the sizes of each planet in our solar system. The students should complete the worksheet (html) 

 

Outcomes
Measurement and Geometry

• Students compute the perimeter, area and volume of common geometric objects and use the results to find measures of less common objects. They know how perimeter, area, and volume are affected by changes of scale.
• Students know the Pythagorean Theorem and deepen their understanding of plane and solid geometric shapes by constructing figures that meet given conditions and by identifying attributes of figures.
• identify and construct basic elements of geometric figures, (e.g., altitudes, midpoints, diagonals, angle bisectors, and perpendicular bisectors; central angles, radii, diameters, and chords of circles) by using compass and straightedge
• use formulas routinely for finding the perimeter and areas of basic two-dimensional figures and the surface area and volume of basic three-dimensional figures, including rectangles, parallelograms, trapezoids, squares, triangles, circles, prisms, and circular cylinders