Lab Skills Review Run this PPT show to help you review for your
test. Slide 2 1. The problem of an experiment is in the form of a
____. Question Slide 3 2. A ______ is an educated guess to the
problem of the experiment. Hypothesis Slide 4 3. The ___________
states whether your hypothesis is correct or incorrect. conclusion
Slide 5 4. What would make the results of an experiment carried out
by a research team valid? The experiment was repeated and the same
results were obtained each time. Slide 6 5. The _______ group does
not contain the independent variable. control Slide 7 6. What is
measured is known as the ______ variable. dependent Slide 8 7. A
new idea that is tested in a scientific experiment is known as the
________. hypothesis Slide 9 8. To test the effect of hormones on
plant growth, 6 potted plant seedlings of the same species were
measured and then sprayed with a growth hormone. After 4 weeks of
growth under ideal conditions, the plants were measured again. a.
How would you set up the control group? There should be another
group with 6 plants that DO NOT receive water. Slide 10 8. To test
the effect of hormones on plant growth, 6 potted plant seedlings of
the same species were measured and then sprayed with a growth
hormone. After 4 weeks of growth under ideal conditions, the plants
were measured again. b. Identify the independent and dependent
variables. Independent: Growth hormone Dependent: Length of the
seedling Slide 11 8. To test the effect of hormones on plant
growth, 6 potted plant seedlings of the same species were measured
and then sprayed with a growth hormone. After 4 weeks of growth
under ideal conditions, the plants were measured again. c. Give 2
factors that must be kept constant. The amount of water each plant
receives. The temperature the plants were kept. The species of
plant used. The amount of soil in each pot. Slide 12 5 10 15 20 25
30 35 20 40 60 80 100 120 140 160 180 20 0 22 0 24 0 26 0 28 0 9.
Identify the independent variable. Water temperature 10. Identify
the dependent variable. Average water flea heart rate Slide 13 5 10
15 20 25 30 35 20 40 60 80 100 120 140 160 180 20 0 22 0 24 0 26 0
28 0 11. State the relationship between the average water flea
heart rate and water temperature. As water temperature increases,
the average water flea heart rate increases (direct). Slide 14 5 10
15 20 25 30 35 20 40 60 80 100 120 140 160 180 20 0 22 0 24 0 26 0
28 0 12. What is the average flea heart rate at 15C? 118 beats/min
13. What is the average flea heart rate at 30C? 240 beats/min Slide
15 14. The results of one experiment carried out by a research team
would be considered valid if a. the experiment had no control setup
b. all the members of the research team came to the same conclusion
c. the experiment had more than one variable d. the experiment was
repeated and the same results were obtained each time Slide 16 15.
Why do scientists make graphs of data from experiments? a. to
observe general trends and patterns in the data b. to make the
observed data more accurate c. to prevent errors in measuring data
d. to help change the original data tables Slide 17 16. Which is
the dependent variable in Amelia's experiment? a. the number of
bean plants in each group b. the amount of water given daily to
each plant c. the height of each bean plant d. the amount of
fertilizer given to each group of bean plants Slide 18 17. A new
idea that is tested in a scientific experiment is known as a(an) a.
theory b. hypothesis c. inference d. observation Slide 19 18. Which
statement about the use of independent variables in controlled
experiments is correct? a. A different independent variable must be
used each time an experiment is repeated. b. The independent
variables must involve time. c. Only one independent variable is
used for each experiment. d. The independent variables state the
problem being tested. Slide 20 19. An investigation is carried out
to determine the effect of exercise on the rate at which a person
can squeeze a clothespin. In this investigation, the independent
variable is the a. control b. exercise c. rate of squeezing d.
number of participants Slide 21 20. An investigation is carried out
to determine the effect of exercise on the rate at which a person
can squeeze a clothespin. In this investigation, the dependent
variable is the a. control b. exercise c. rate of squeezing d.
number of participants Slide 22 21. Why do scientists consider any
hypothesis valuable? a. A hypothesis requires no further
investigation. b. A hypothesis may lead to further investigation
even if it is disproved by the experiment. c. A hypothesis requires
no further investigation if it is proved by the experiment. d. A
hypothesis can be used to explain a conclusion even if it is
disproved by the experiment. Slide 23 22. What is the definition of
volume? The amount of space an object takes up. 23. What is the
name of the instrument used to measure the volume of a liquid?
Graduated cylinder Slide 24 24. How is the volume of a liquid
measured? Units? Use a graduated cylinder. mL or L 25. How is the
volume of a regular solid measured? Units? length x width x height
cm 3 Slide 25 3cm 5cm 2cm V = l x w x h V = 3 x 2 x 5 V = 30.0 cm 3
26. Calculate volume. Show all work! Slide 26 27. Measure the
volume of the liquid to the right. 67mL 28. Measure the volume of
the liquid to the left. 21mL Slide 27 29. Measure the volume of the
liquid to the right. 30. Measure the volume of the liquid to the
left. 2mL49mL Slide 28 31. What is the volume of this toy dinosaur?
0.8mL (5.6mL 4.8mL) 32. What is the name of this method?
displacement Slide 29 33. What is the definition of mass? The
amount of matter in an object. 34. What is the name of the
instrument used to measure mass? triple beam balance 35. What are
the units used to measure mass? grams Slide 30 36. Mass = 137.4 gm
Slide 31 37. When using the Celsius scale: a. water freezes at 0C
b. water boils = 100C c. human body temperature is 37C Slide 32
01234 cm 8mm 38. What is the length of the object in millimeters?
Centimeters? 0.8cm Slide 33 01234 cm 39. What is the length of the
object in centimeters? Millimeters? 2.8cm 28mm Slide 34 CONVERSIONS
KILO (k) HECTO (h) DECA (da) METER (m) DECI (d) CENTI (c) MILLI (m
) Slide 35 40. Complete the following conversion: 21hm = ____dm 21.
= 21000dm 00 0 Slide 36 41. Complete the following conversion: 12cm
= ____m 12. = 0. 12m Slide 37 42. Complete the following
conversion: 0.45m = ____ km.45 0 0 0 =.00045km
