Laboratory Apparatus and Instruments
26 Grade 7 Integrated Science questions on Laboratory Apparatus and Instruments, with worked marking schemes. 26 questions are available on this topic in full.
Question 1
3 marksA learner is given a beaker, a thermometer and a stopwatch to investigate how the temperature of heated water changes with time. State the use of each of the three apparatus in this investigation.
(3 marks)
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1 markWhich instrument would a learner use in the laboratory to measure the mass of a solid sample?
A. Thermometer
B. Beam balance
C. Stopwatch
D. Measuring cylinder
(1 mark)
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1 markWhich instrument is used to measure temperature in the laboratory?
A. Beam balance
B. Ruler
C. Thermometer
D. Spring balance
(1 mark)
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1 markWhich of the following is used to transfer small amounts of liquid?
A. Dropper (pipette)
B. Funnel
C. Flask
D. Beaker
(1 mark)
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4 marks(a) Name the laboratory apparatus used to measure the volume of a liquid accurately. (1 mark)
(b) State the use of each of the following apparatus:
(i) Bunsen burner (1 mark)
(ii) Test tube (1 mark)
(iii) Beam balance (1 mark)
(4 marks)
Marking scheme
(a) Measuring cylinder (or burette/pipette). (1 mark) (b) (i) Bunsen burner - used for heating substances/providing a flame. (1 mark) (ii) Test tube - used for holding small amounts of substances during experiments/reactions. (1 mark) (iii) Beam balance - used for measuring the mass of substances. (1 mark)
Question 6
3 marksState the International System of Units (SI unit) for each of the following:
(a) Temperature
(b) Mass
(c) Length
(3 marks)
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4 marks(a) Name the laboratory apparatus used for each of the following:
(i) measuring the volume of a liquid accurately; (ii) heating substances over a flame. (2 marks)
(b) State the use of a Bunsen burner and name the fuel it commonly uses. (2 marks)
(4 marks)
Marking scheme
(a) (i) Measuring cylinder (a burette or pipette may be used for greater accuracy); (ii) test tube (held with a test-tube holder and heated using a Bunsen burner). (2 marks) (b) A Bunsen burner is used to heat substances/produce a flame in the laboratory; it commonly uses gas (e.g. cooking gas/LPG or biogas) as fuel. (2 marks)
Question 8
1 markA learner is asked to measure exactly 25 mL of water for an experiment. Which apparatus should the learner use to get the most accurate volume?
A. Beaker
B. Measuring cylinder
C. Conical flask
D. Test tube
(1 mark)
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1 markWanjiku wants to get the hottest part of a Bunsen burner flame for heating. Which type of flame should she use?
A. A smoky yellow flame
B. A yellow luminous flame
C. A flickering orange flame
D. A blue non-luminous flame
(1 mark)
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4 marksThe diagram description below refers to a Bunsen burner.
(a) State the function of the air hole.
(b) Explain what happens to the flame when the air hole is fully closed.
(4 marks)
Marking scheme
(a) The air hole controls/regulates the amount of air (oxygen) mixing with the gas before combustion (1 mark) — accept: opening it increases air supply (1 mark). (b) When the air hole is closed, little air enters, so the gas burns incompletely (1 mark) producing a yellow, luminous, sooty/wavy flame that is not very hot (1 mark).
Question 11
1 markA beam balance is used to measure
A. temperature
B. mass
C. volume
D. length
(1 mark)
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1 markA tripod stand is used together with a wire gauze to
A. measure temperature
B. support a container during heating
C. store chemicals
D. filter a mixture
(1 mark)
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1 markDuring a science lesson, a teacher heats a small amount of liquid directly over a Bunsen burner flame. Which piece of apparatus is MOST suitable for holding the liquid while it is being heated?
A. Watch glass
B. Test tube
C. Volumetric flask
D. Measuring cylinder
(1 mark)
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1 markA learner needs to pick up a hot evaporating dish from a wire gauze. Which apparatus should be used to hold it safely?
A. A spatula
B. A dropper
C. A pair of scissors
D. A pair of tongs
(1 mark)
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3 marks(a) Name the apparatus used to measure the volume of a liquid accurately in the laboratory.
(b) When reading the volume, explain how the learner should position the eye to avoid an error.
(3 marks)
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1 markA Bunsen burner is used in the laboratory to
A. measure mass
B. hold liquids
C. heat substances
D. filter mixtures
(1 mark)
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1 markWhich laboratory apparatus is best suited for separating solid particles from a liquid mixture using filter paper?
A. Filter funnel
B. Beaker
C. Measuring cylinder
D. Gas jar
(1 mark)
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1 markThe correct way to read the volume of a liquid in a measuring cylinder is to
A. read from above the cylinder
B. read at eye level at the bottom of the meniscus
C. read at the top of the meniscus
D. tilt the cylinder and read
(1 mark)
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1 markWhich apparatus is used together with a Bunsen burner and a wire gauze to support a beaker during heating?
A. Test-tube rack
B. Tripod stand
C. Retort stand
D. Filter funnel
(1 mark)
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3 marksA Grade 7 learner spills a small amount of dilute acid on the laboratory bench during an experiment. State THREE safety rules the learner should follow to work safely in the science laboratory.
(3 marks)
Marking scheme
Any 3 for 1 mark each: report the spill to the teacher immediately; wear protective clothing such as a lab coat/goggles; do not taste chemicals; wipe/clean the spill following the teacher's instructions; wash hands after the experiment; do not eat or drink in the laboratory; keep the bench clean and tidy.
Question 21
4 marksAnswer the following questions about common laboratory apparatus used by Grade 7 learners.
(a) Name the apparatus that is used to measure the volume of a liquid accurately. (1 mark)
(b) State the use of each of the following apparatus:
(i) Beaker (1 mark)
(ii) Test tube (1 mark)
(iii) Bunsen burner (1 mark)
(4 marks)
Marking scheme
(a) Measuring cylinder. (1 mark) (b) (i) Beaker - used to hold, mix or heat liquids / measure approximate volumes of liquids. (1 mark) (ii) Test tube - used to hold small quantities of substances for heating or for carrying out reactions/experiments. (1 mark) (iii) Bunsen burner - used as a source of heat for heating substances in the laboratory. (1 mark)
Question 22
4 marks(a) Name the laboratory apparatus used for each of the following:
(i) Measuring an accurate (fixed) volume of a liquid.
(ii) Heating substances over a flame. (2 marks)
(b) State two reasons why a Bunsen burner is preferred to a candle for heating in the laboratory. (2 marks)
(4 marks)
Marking scheme
(a) (i) Pipette (a burette is also accepted for measuring accurate variable volumes). (1 mark) (ii) Bunsen burner. (1 mark) (b) Any two of: the Bunsen burner produces a hotter flame so heating is faster; its flame is cleaner (non-luminous) and does not deposit soot on apparatus; the flame can be controlled/adjusted using the air hole; it gives a steady, continuous flame. (2 marks)
Question 23
1 markA learner uses a hand lens (magnifying glass) during a science activity. What is the main purpose of this instrument?
A. To magnify small objects so they appear bigger
B. To measure temperature
C. To measure the mass of objects
D. To measure electric current
(1 mark)
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1 markThe apparatus used to hold a test tube while heating is a
A. wire gauze
B. tripod stand
C. test tube holder
D. retort stand
(1 mark)
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1 markWhich laboratory apparatus is used to measure the volume of a liquid accurately?
A. Measuring cylinder
B. Conical flask
C. Beaker
D. Test tube
(1 mark)
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3 marksName three laboratory apparatus and state the function of each.
(3 marks)
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