A layer or a group of closely-packed layers containing similar
fossils of similar age is called a stratum.
If you find, say, a high stratum, a low stratum, and a stratum
in the middle, then you've found three different strata.
A. Hydrogen------uses a fuel cell
b. Solar power----harnesses the energy of the sun directly
c. Natural gas---not renewable
d. Hydroelectricity-----can only operate near rivers
Solar power harnesses energy from the sun via photo-voltaic cells. Natural gas is a non-renewable resource because it takes millions of years to create the resource and if it is used up will take millions of years before it is replenished. Hydroelectricity harnesses the power of water to turn turbines to generate electricity.
Sand this is because It takes thousands of years for a rock to turn into sand.
Explanation:
<u>coniferous </u><u>trees</u>
coniferous tree grow in cold regions
they have evergreen leaves
the heart of the tree is soft
<u>deciduous trees</u>
deciduous tree grow in extremely hot regions
they shed leaves once a year
the heart of the tree is soft