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Question paper unit3 June2017

Explain structural isomerism and the different types that exist (i.e....

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Paper Reference

Applied Science

Unit 3: Science Investigation Skills –

Teacher/Technician notes and guidance –

Confidential

Part P

June 2017

31619H

Instructions

• This document contains confidential information for centres on the preparation

and administration of the Part A practical investigation.

• This document should be opened once it is received to allow centres to prepare

for the Part A practical investigation.

• This document is confidential. It must be stored securely and must not be

disclosed to learners.

• This document should not be returned to Pearson.

Pearson BTEC Level 3 Nationals Extended Certificate

Turn over

P52311A

2 P52311A

Guidance for Teachers/Tutors

Set task

The set task requires learners to carry out a practical investigation in Part A and then complete a taskbook in Part B.

Both Part A and B of the task must be completed in the assessment period timetabled by Pearson.

The teacher/technicians notes provided in this document give information on the method for the practical investigation. It is the responsibility of centres to resource and trial the practical investigation prior to it being undertaken by learners in the assessment period.

Any assessment material not required by learners for submission must be collected and held securely by the Exams Office until the EAR deadline at which point they may be recycled or destroyed.

Part A Practical investigation

Learners must not see the teacher/technician notes. A separate Part A will be available for learners at the beginning of the assessment period.

The Part A task brief provides all the necessary information for learners to conduct the practical investigation and includes a notes page for learners to record their results/observations.

Centres will be required to supervise learners when they carry out the investigation.

Teachers cannot provide guidance during the practical investigation. The practical investigation may take up to three hours depending on the nature of the investigation and it should be completed in the first section of the assessment period.

Learners may work in pairs to conduct the practical investigation, however they must record their set of results/observations independently.

Once learners have completed the practical investigation, teachers must keep the Part A taskbook containing learner results/observations secure.

This must be returned to learners when they start Part B in the third week of the assessment period.

Learners will need to refer to their results/observations obtained from Part A when they complete Part B.

4 P52311A

Learners will measure and record:

the height of the plants
the pH of the compost
any relevant observations.

Method for measuring the height of the plants

Cut each plant off at compost level.
Measure the height of each plant using a 30 cm ruler.

Method for measuring the pH of the compost

Fill a boiling tube to a depth of 2 cm with compost from module tray A.
Add distilled water to the boiling tube until it is two thirds full.
Place a bung in the boiling tube and shake ten times.
Place a pH probe in the boiling tube and record the pH.
Rinse the pH probe with distilled water.
Repeat steps 1-5 with compost from module trays B-F, using a clean boiling tube each time.

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P51723A

Instructions

• Part A contains material for the completion of the preparatory work for the

set task.

• Part A should be undertaken over approximately 3 hours across a period of

2 weeks (term time) as timetabled by Pearson.

• Part A is specific to each series and this material must only be issued to learners

who have been entered to undertake the task in the relevant series.

• Part B materials for the set task will be issued prior to the start of the

supervised assessment period according to the guidance in the specification.

• This taskbook should not be returned to Pearson.

Applied Science

Unit 3: Science Investigation Skills

Part A

Write your name here Surname Other names

31619H

June 2017 Paper Reference

Pearson BTEC Level 3 Nationals Extended Certificate

3 P51723A Turn over

Set Task Brief

Please read the following brief carefully before completing the practical investigation.

You must observe safe practice when carrying out the practical investigation.

You are an assistant groundskeeper for a small, inner city nature reserve.

You have been asked to investigate how pH affects plant growth.

You have been given six module trays, labelled A-F.

Each module tray contains soil taken from different areas of the nature reserve.

Each module tray was sown with ten seeds that were left to grow.

Safety information

You may have allergies to plants. Take necessary precautions and make sure you wash your hands after carrying out the investigation.

You will measure and record:

the height of the plants
the pH of the soil
any relevant observations.

Method for measuring the height of the plants

Cut each plant off at soil level.
Measure the height of each plant using a 30 cm ruler.

Method for measuring the pH of the soil

Fill a boiling tube to a depth of 2 cm with soil from module tray A.
Add distilled water to the boiling tube until it is two thirds full.
Place a bung in the boiling tube and shake ten times.
Place a pH probe in the boiling tube and record the pH.
Rinse the pH probe with distilled water.
Repeat steps 1-5 with soil from module trays B-F, using a clean boiling tube each time.

4 P51723A

Record your results/observations in the space provided.

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Answer ALL questions in Section 1 and Section 2. Write your answers in the spaces provided.

SECTION 1

1 (a) Record your experimental results of pH, plant height and average plant height in a suitable table, using the space provided. (3)

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(b) State two other observations you made about the plants you measured. (2)

....................................................................................................................................................................................................................................................................................

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(f ) Plot a line graph of average plant height against soil pH. (3)

(g) Describe, using the graph, how the change in soil pH affected the height of the plants you measured. (3)

(Total for Question 1 = 18 marks)

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(b) Your colleague used a quadrat to estimate grass cover in each area.

The percentage grass cover for the three areas is shown in the table.

area grass cover %

1 25

2 80

3 30

(i) Give two reasons why the grass cover might be different in each area. (2)

(ii) Your colleague carries out an investigation into grass cover in the small, inner city nature reserve every year.

Their results from previous years meant they expected area 1 to have 35% grass cover.

Complete the table. (1)

grass cover % no grass cover %

observed

expected 35

(iii) Determine, using the chi squared test, if the results are consistent with those expected.

Use X

O E

E

−

∑

( )

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The chi squared distribution table is given.

degrees of freedom

1 3.

2 5.

3 7.

4 9.

5 11.

Show your working. (5)

(Total for Question 2 = 14 marks)

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Question 4 begins on the next page

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SECTION 2

4 Reactivity of metals.

A more reactive metal will displace a less reactive metal in solution.

This displacement reaction can release thermal energy.

Part of the reactivity series of metals is shown.

increasing reactivity

magnesium zinc lead copper

You have been asked to write a plan to investigate whether the displacement reactions between these metals and different metal salt solutions release thermal energy.

The metal salt solutions are magnesium sulfate, zinc sulfate, lead nitrate and copper sulfate.

Your plan should include the following details:

a hypothesis
selection and justification of equipment, techniques or standard procedures
health and safety associated with the investigation
methods for data collection and analysis to test the hypothesis including:
- quantities to be measured
- number and range of measurements to be taken
- how equipment may be used
- control variables
- brief method for data collection analysis. (12)

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