Soil
Where do you find soils?
on the Earth's crust
Rocks come from ____.
Magma
Toasting is chemical true or false?
True
What are thermal conductors?
Thermal conductors are materials that transfer heat easily, allowing thermal energy to move through them efficiently.
What are chemical reactions?
a process that transforms one or more substances into different substances
How soils form?
from the gradual breakdown of rocks through weathering
Where do you find rocks?
You can find rocks in various locations such as quarries, riverbanks, beaches, and even your own backyard.
Is evaporation and condensation physical or not?
Both evaporation and condensation are classified as physical changes, as they involve changes in the state of matter without altering the chemical composition of the substance.
What are electrical conductors?
materials that allow electricity to flow through them easily
Example of non chemical reaction
melting ice, tearing paper, boiling water, and dissolving sugar in water
What happens without soil?
Biodiversity, ecosystems, water filtration, and carbon sequestration
When was the first rocks formation?
4 billion years old
when was the first physical change
Middle Ages
Why metal is a good conductor?
their atoms have a large number of "free" or delocalized electrons that can move easily throughout the metal.
Give examples of chemical reaction.
burning wood (combustion), iron rusting (oxidation), and digesting food (breakdown of large molecules)
What are soils?
Biologically active and porous medium
what happens without rocks
no soil for plants to grow in, no water for animals to drink, and no way for nutrients to be recycled.
when was the first chemical change
Seventeenth and eighteenth centuries
Is a fabric a good or bad conductor? Explain your answer.
Fabric is a bad conductor of electricity and heat, which is why it is considered a good insulator. This is because the fibers in fabric do not have free-moving electrons and the weave traps air, which is also a poor conductor.
why is cooking a chemical reaction
heat causes the food's molecules to break down and recombine into new substances with different flavors, textures, and colors
When was the first soil forming?
Around 500 million years ago
why do we need rocks
Learning about earth materials, structure, and systems
is burning of wood a chemical change or physical
Burning wood is a chemical change because it results in the formation of new substances, such as carbon dioxide, water vapor, and ash, through a process called combustion.
Why fabric is a bad conductor?
its fibers trap air
How baking soda becomes a chemical reaction?
when it combines with an acid or is heated, causing it to break down into new substances