---
title: Ascertain the approximate gravitational acceleration at the lunar su… — The Moon · tree and pragmatics
description: Ascertain the approximate gravitational acceleration at the lunar surface relative to that of the Earth. Exam question 3 of lesson 6 «The Moon» of the space course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Exam question 3 · The Moon

<!-- .ven lang=en -->
Ascertain the approximate gravitational acceleration at the lunar surface relative to that of the Earth.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you · **What happens:** ascertain · **To what, where:** approximate gravitational acceleration, lunar surface relative

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This is exam question 3 of lesson 6 «The Moon» of the space course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/space/6-the-moon/#e3).

## The question {#question}

```conllu
# sent_id = question:space:6-the-moon:e3:1
# text = Ascertain the approximate gravitational acceleration at the lunar surface relative to that of the Earth.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
3	approximate	approximate	ADJ	JJ	Degree=Pos	5	amod	_	_
4	gravitational	gravitational	ADJ	JJ	Degree=Pos	5	amod	_	_
5	acceleration	acceleration	NOUN	NN	Number=Sing	1	obj	_	_
6	at	at	ADP	IN	_	10	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
8	lunar	lunar	ADJ	JJ	Degree=Pos	10	amod	_	_
9	surface	surface	NOUN	NN	Number=Sing	10	compound	_	_
10	relative	relative	NOUN	NN	Number=Sing	1	obl	_	_
11	to	to	ADP	IN	_	12	case	_	_
12	that	that	PRON	DT	Number=Sing|PronType=Dem	10	nmod	_	_
13	of	of	ADP	IN	_	15	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	Earth	Earth	PROPN	NNP	Number=Sing	12	nmod	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the approximate gravitational acceleration |  | the lunar surface relative to that |  |  | vn discover-84 «NP V NP»: agent=Agent acceleration=Topic |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Approximately one half

```conllu
# sent_id = question:space:6-the-moon:e3:o1:1
# text = Approximately one half
1	Approximately	approximately	ADV	RB	_	2	advmod	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	half	half	NOUN	NN	Number=Sing|NumForm=Word|NumType=Frac	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
Approximately equal

```conllu
# sent_id = question:space:6-the-moon:e3:o2:1
# text = Approximately equal
1	Approximately	approximately	ADV	RB	_	2	advmod	_	_
2	equal	equal	ADJ	JJ	Degree=Pos	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Approximately one sixth

```conllu
# sent_id = question:space:6-the-moon:e3:o3:1
# text = Approximately one sixth
1	Approximately	approximately	ADV	RB	_	2	advmod	_	_
2	one	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
3	sixth	sixth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Approximately twice as great

```conllu
# sent_id = question:space:6-the-moon:e3:o4:1
# text = Approximately twice as great
1	Approximately	approximately	ADV	RB	_	2	advmod	_	_
2	twice	twice	ADV	RB	NumForm=Word|NumType=Mult	4	advmod	_	_
3	as	as	ADV	RB	_	4	advmod	_	_
4	great	great	ADJ	JJ	Degree=Pos	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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