Science - 2019-20
K.8 - Earth and Space Systems: Shadows
The student will investigate and understand that light influences temperature on Earth's surfaces and can cause shadows. Key ideas include
a) the sun provides light and warms Earth's surface;
- make observations and conduct an investigation to determine the effect of sunlight on Earth's surface. Bloom's Level: Understand / Analyze
b) shadows can be produced when sunlight or artificial light is blocked by an object; and
- demonstrate how shadows change as the direction of the light source changes. Bloom's Level: Knowledge / Understand
- describe how shadows occur. Bloom's Level: Understand
- identify sources of light that can produce shadows. Bloom's Level: Understand
- design and build a simple structure that will reduce the warming effect of sunlight on an area or an object. Bloom's Level: Create
- compare the relative temperature of an object in sunlight versus the same object in a shadow.
Repeating patterns in nature, or events that occur together with regularity, are clues to cause and effect relationships.
UNDERSTANDING THE STANDARD
- A shadow is an image of an object created when light
is blocked by that object.
- Shadows can occur whenever light is present.
- People can make shadows.
- Living and nonliving things can make shadows.
What is a shadow?
How is a shadow produced ?
Who or what produces shadows?
How can shadows change?
In order to meet this standard, it is expected that students will
- recognize that sunlight warms Earth's surface.
- identify a shadow.
- describe how shadows occur.
- identify and describe sources of light — sun, electric
lights, and flashlights — that can produce shadows.
- determine that objects in a shadow will be cooler than objects in the sun
- demonstrate that shadows change as the direction of the light source changes.
block - stops or prevents passage of light
electric light - produces light through the flow of electrons; lamps, overhead lights, spotlights, etc.
flashlight - battery operated light
light - allows sight and makes things visible
living things - are composed of cells and require food, water, shelter etc.
non-living things - items which do not require air, water, food and shelter or space to live.
objects- a material that can be seen and touched
shadow - a dark area or shape produced by a body coming between rays of light and a surface
sun- the star around which Earth orbits; produces light andheat