earth science

Symplocos thwaitesii

Symplocos thwaitesii is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Symplocos thwaitesii rather than just read about it. In short: Symplocos thwaitesii, or the buff hazelwood, is a rainforest tree growing in eastern Australia. Seen in tropical, sub-tropical and warm temperate rainforests, often in gullies.

Key takeaways

Symplocos thwaitesii belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Symplocos thwaitesii to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Symplocos thwaitesii from memory before moving on to harder problems.

Reference excerpt

Symplocos thwaitesii, or the buff hazelwood, is a rainforest tree growing in eastern Australia. Seen in tropical, sub-tropical and warm temperate rainforests, often in gullies. Occasionally it grows in cooler situations such as at Monga National Park. The range of natural distribution is from Orbost (37° S) in the state of Victoria up the east coast of New South Wales to the Atherton Tableland (17° S) in tropical Queensland.

Description A small to medium-sized tree, up to 30 metres tall and 80 cm in diameter. Usually much smaller, particularly in New South Wales where it is mostly seen between 6 and 12 metres in height. In Victoria it can grow to 22 metres high, with a trunk diameter of 57 cm. The trunk is straight and cylindrical, without buttresses or fluting. The bark is fairly smooth; dark brown in colour. Sometimes with vertical rows of bumps. Flaking plates of bark and vertical cracks may be seen on larger trees.

Leaves Leaves alternate, firm, heavy and toothed, but not toothed at the base. The leaf serration is more evident and more widely spaced than in the white hazelwood. The leathery leaves "rattle" together when a branch is shaken. The leaf shape is elliptic or wide lanceolate 12 to 18 cm long to a short leaf tip. Leaf venation is easily noticed, particularly on the underside. Net veins are not clearly evident above the leaf, better seen under the leaf. The paler coloured midrib is sunken on the top leaf surface, and raised under the leaf. The leaf stalk is 10 to 15 mm long, flattened on the top side and but rounded underneath.

Flowers and fruit The greenish white flowers form on racemes; occasionally the flowers turn bluish-black. Flowering occurs between the months of September to December, although these trees may flower at other times such as between May and June. Flowers are relatively large, 9 to 15 mm long, giving rise to an alternative common name large-flowered hazelwood. Another distinguishing feature is that the flowers of the similar white hazelwood are on panicles, not racemes as is the case in this species. The fruit is a drupe, 12 to 14 mm long, purplish-black and egg-shaped, maturing in January to March. The five sepals persist on the fruit, but not the floral bracts. The fruit is eaten by the green catbird. Fresh seed should be used for regeneration, after the removal of the aril.

References

Floyd, A. G. (1989). Rainforest Trees of Mainland South-eastern Australia (1st ed.). Port Melbourne: Elsevier Australia - Inkata Imprint, copyright Forestry Commission of New South Wales (published 1 December 1989). p. 397. ISBN 0-909605-57-2. Retrieved 4 August 2009. (other publication details, included in citation) Symplocos thwaitesii at NSW Flora Online Retrieved 4 August 2009

Illustrations

Worked examples

Example 1 — a first encounter with Symplocos thwaitesii

Start with the simplest possible case. Write down what Symplocos thwaitesii claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Symplocos thwaitesii before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Symplocos thwaitesii ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Symplocos thwaitesii

In research: Symplocos thwaitesii appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Symplocos thwaitesii in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Symplocos thwaitesii is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ericales of Australia, Flora of New South Wales, Flora of Queensland, so understanding it makes those chapters shorter.
In everyday life: Look for Symplocos thwaitesii outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Symplocos thwaitesii in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Symplocos thwaitesii means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Symplocos thwaitesii out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Symplocos thwaitesii in simple terms?

Symplocos thwaitesii, or the buff hazelwood, is a rainforest tree growing in eastern Australia. Seen in tropical, sub-tropical and warm temperate rainforests, often in gullies.

Why does Symplocos thwaitesii matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Symplocos thwaitesii?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Symplocos thwaitesii.