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Science
Grade 2-3
Sun Moon Day Night and Shadows for Young Scientists Cheat Sheet
A printable reference covering the Sun, Moon, day, night, shadow direction, shadow length, and light sources for grades 2-3.
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This cheat sheet helps young scientists understand why we have day and night, why the Moon changes position, and how shadows form. Students need these ideas to explain what they see in the sky and on the ground each day. It connects everyday observations to simple science patterns. The goal is to help students use words, pictures, and evidence to describe the Sun, Moon, and shadows.
Key Facts
- The Sun is a star that gives Earth light and heat.
- Day happens on the side of Earth facing the Sun, and night happens on the side facing away from the Sun.
- Earth spins once in about 24 hours, which makes one day and one night.
- A shadow forms when an object blocks light from a light source.
- Shadow direction is opposite the light source, so if the Sun is in the east, the shadow points west.
- A low Sun makes a long shadow, and a high Sun makes a short shadow.
- The Moon does not make its own light because it reflects light from the Sun.
- The Sun appears to move across the sky because Earth is spinning.
Vocabulary
- Sun
- The Sun is the star closest to Earth and the main source of light and heat for our planet.
- Moon
- The Moon is a natural object that moves around Earth and reflects sunlight.
- Day
- Day is the time when your part of Earth is facing the Sun.
- Night
- Night is the time when your part of Earth is facing away from the Sun.
- Shadow
- A shadow is a dark shape made when an object blocks light.
- Light source
- A light source is something that gives off light, such as the Sun, a lamp, or a flashlight.
Common Mistakes to Avoid
- Saying the Moon makes its own light is wrong because the Moon reflects light from the Sun.
- Thinking the Sun really moves around Earth each day is wrong because Earth spins and makes the Sun appear to move.
- Drawing a shadow toward the Sun is wrong because shadows point away from the light source.
- Expecting shadows to stay the same all day is wrong because the Sun’s position in the sky changes as Earth spins.
- Calling every dark place a shadow is wrong because a shadow must be made by an object blocking light.
Practice Questions
- 1 A tree has a shadow that is 12 feet long in the morning and 4 feet long at noon. How many feet shorter is the noon shadow?
- 2 Earth takes about 24 hours to spin once. How many hours are in 2 full spins of Earth?
- 3 A flashlight shines from the left side of a toy car. Which side of the toy car will the shadow appear on?
- 4 Explain why a shadow is longer when the Sun is low in the sky than when the Sun is high in the sky.