Dichotomous Key for Leaf Classification 1. a. Compound leaf
b. Simple leaf
2. a. Palmate (lobed leaves that radiate from a central point).
b. Pinnate (leaflets on either side of a stem).
3. a. Leaflets taper to pointed tips..
b. Oval leaflets with rounded tips...
4. a. Leaf veins branch out from one central point...
b. Leaf veins branch off of main vein in the middle of the leaf
5. a. Leaf is heart-shaped
b. Leaf is star-shaped
6. a. Leaf has jagged (toothed) margin.
b. Leaf has smooth (untoothed) margin..
go to 2
.go to 4
Aesculus
.go to 3
Carya
Robinia
go to s
go to 6
Cercis
Liquidambar
Betula
Magnolia
O
Smooth
Serrated
Undulated
Lobate

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

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