4th Grade Science4.3.7

Spenser Young

Explain that smaller rocks come from the breakage and weathering of bedrock and larger rocks and that soil is made partly from weathered rock, partly from plant remains, and also contains many living organisms. (Core Standard)

Where did all of these small rocks come from?

EVERYWHERE!

• Rocks are hardened minerals from the earth that become broken up and weatherized over time and can turn into all sizes once broken and grinded down!

Rocks IN Dirt

•Overtime rocks will continue to break and grind into smaller rocks and become mixed with soil

But Wait….What is dirt?

• What can we say that soil is made/composed of?

(Predictions):• • • • •

3 Main Ingredients!

• Rocks• Dead Plant Material • Living Organisms

YOU can MAKE Soil (Compost) !

Gather all your organic scraps and allow them to breakdown over a course of time (2weeks minimum)…

…& then you get…

Homemade & Nutrient-rich Compost Soil

Great for garden beds

Acts as an organic fertilizer

Re-uses all parts of mother nature

Re-Cap

• Smaller rocks come from bigger rocks

• Rocks are hardened minerals that break and scatter over time

• Soil is composed of 3 main ingredients:– Rocks, Dead Plant Material, & Living Organisms

Sources

• Pictures provided by .ppt clip art, Flickr, and actual taken photos

• Activity provided by the inspiration from Lowe’s compost making kit