1.Which mineral is used in making cans and is found mainly in Australia?

hematite

bauxite

tektite

magnetite

2.Smelting is the major method used to refine and enrich which of the following?

oil

coal

iron ore

uranium ore

3.Which of the following is an example of sustainable use of natural resources?

harvesting huge populations of fish from a fishing shoal

clear-cutting a forest

planting multiple crops together on a field and harvesting them at different times

continuously strip mining coal deposits in an area

Alichen is an organism that structurally appears to be a single organism. but a lichen is actually two different organisms—a fungus and green algae—living together as one organism. the fungal partner derives its nutrition from the photosynthesizing algae. how does a lichen differ in its photosynthetic activity from elysia chlorotica, the sea slug that’s considered to be a photosynthesizing animal? a. in lichens, the fungi photosynthesize on their own, while elysia chlorotica forms a relationship with a photosynthesizing plant. b. in lichens, the relationship with the algae lasts throughout the life cycle, but in elysia chlorotica, the relationship occurs only during the immature juvenile stage of the slug’s life cycle. c. lichens can photosynthesize only because of the living algal partner, while elysia chlorotica incorporates chloroplasts from algae into its cells. d. in lichens, the association between the fungi and algae is permanent, while elysia chlorotica associates with a photosynthesizing organism only when it requires food.

What is a cordon and where is it found

What was the land like over 500 million years ago? what was under the sea?