Check and challenge
Scientists
1.
Match the following
scientists with their work.
7.
Scientists
Work done
Physicist
Investigates how rocks and mountains form
Chemist
Studies living things
Biologist
Explains things like movement, heat and light
Astronomer
Studies how substances react with others
Earth scientist
Studies the sky
Test
Science at work
(b) When using a thermometer to measure the
temperature of a liquid as it is heated, place the
bulb of the thermometer on the bottom / near the
centre of the beaker.
Four students each measured the temperature in the
classroom using a thermometer. Their results were:
Student
Equipped for science
Draw and label the parts of a Bunsen burner. At the
top of the Bunsen burner, draw the safety flame.
Show whether the air hole is open or closed.
3.
Name these pieces of equipment and describe what
they are used for.
8.
Distance from starting point (cm)
2.
Hands on science
4.
List two safety rules and explain why they are
important.
5.
(a) Give an example of a substance you might use
in a laboratory that is:
1
23.5
2
24.0
3
25.0
4
22.0
(a) Create a bar graph of the results by drawing it on
paper, or by using a spreadsheet graphing tool.
(b) What are some possible reasons for the difference
between measurements?
The following graph shows how far from the starting
point a snail moves in an experiment.
30
25
20
15
10
5
0
(i) corrosive
(ii) flammable.
6.
Temperature (°C)
1
(b) What precautions should be taken when using
these substances?
Re-write the following sentences correctly by
selecting the appropriate words in italic.
(a) When lighting a Bunsen burner, light the match
before / immediately after turning on the gas.
9.
rself
you
2
3
4
5
6
7
8
Time (min)
(a) How far from the starting point was the snail after
7 minutes of timing?
(b) During what times did the snail not move at all?
(c) What does the graph tell us about the snail’s
movement between the 7- and 8-minute marks?
Make a list of the information that a laboratory report
should include.
18
Science Alive for VELS Level 5
Science observations
10.
Sports science
1.
Look at the photograph below.
(a) What qualitative observations do you think the
scientist can make from this experiment?
(b) Suggest two different quantitative observations
the scientist might make from this experiment.
(c) What do you think might be the aim of this
experiment?
2.
Up until 1964, a hand-held
stopwatch was used to time
events at the Olympics and other
games. Since then, electronic and computerised
timing have been introduced. Stopwatches can
measure accurately to 0.1 s and electronic timers to 0.01 s.
Computerised timers measure to 0.001 s.
(a) Why is this type of technology important?
(b) Why is it more important today than 50 years ago?
The following table shows the winning times for the
men’s 400 m freestyle swimming event. The data are
from various Olympic games from 1896 until 2004.
Year
11.
Look at the photograph below.
(a) What types of scientist might be involved in this
experiment?
(b) What do you think is the purpose of this
experiment?
(c) Give an example of a quantitative and a
qualitative observation that a scientist may make
from this experiment.
Name, country
Time (min/s)
1896
Paul Neumann, Austria
8:12.6
1908
Henry Taylor, Great Britain
5:36.8
1920
Norman Ross, USA
5:26.8
1932
Buster Crabbe, USA
4:48.4
1948
Bill Smith, USA
4:41.0
1960
Murray Rose, Australia
4:18.3
1972
Bradford Cooper, Australia
4:00.27
1984
George DiCarlo, USA
3:51.23
1996
Danyon Loader, New Zealand
3:47.97
2000
Ian Thorpe, Australia
3:40.59
2004
Ian Thorpe, Australia
3:43.10
(a) Are all of the data spread over equally spaced time
intervals?
(b) Plot a graph of the times for the men’s 400 m
freestyle. Take into account your answer to
question (a).
(c) Use your graph to estimate what the winning time
for this event was in the 1956 Melbourne Olympic
games. Go to www.jaconline.com.au/
sciencealivevic/salevel5 and click on the 1956
Swimming link to check your answer.
(d) How have the winning times changed over the
108-year period?
(e) Suggest some reasons for the change in winning
times.
(f) Discuss how you believe the times for the men’s
400 m freestyle might change over the
next 40 years.
19
1. Science at work 1