The Scientific Process
Lab Safety
Observation vs Inferences
Measurement
Density
100
The summary at the end of an experiment that explains the results is called the ...
conclusion
100
Which of the following is NOT a safe laboratory procedure?
wearing goggles when working with chemicals
pulling back long hair and baggy clothing
picking up broken glass with your hands
cleaning all equipment after it is used
washing your hands at the end of an experiment
picking up broken glass with your hands
100
Scientists are able to make observations and infer about their surroundings by using their ...
5 senses
100
The instrument used to measure the mass of an object is called
a Triple Beam Balance
100
What is the correct formula for calculating density?
Density = mass/volume
200
In a controlled experiment, how many independent variables can be worked with at a time?
One
200
If you have been injured during a lab, the first thing you should do is...
Notify your teacher
200
State whether the following statement is an observation or an inference.
There are four penguins shown in the picture.
Observation
200
What is the basic unit of liquid volume in the metric system?
ml (mililiters)
200
Which box has a higher density?
Box A
300
A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?
heart rate
300
Correct the statement to make the statement true:
Laboratory work may be started immediately upon entering the laboratory even if the teacher is not yet present.
Laboratory work should not be started immediately upon entering the laboratory even if the teacher is not yet present.
300
Turn the following statement into an inference.
The penguins are standing on snow and ice.
It must be cold.
They are located somewhere cold.
Answers may vary.
300
What is the measurement on the triple-beam balance shown? With units!
335g
300
Put the liquids in order from most dense to least dense?
4, 3, 2, 1
400
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
Independent Variable
400
The following activity is permitted in the laboratory:
A. chewing gum
B. eating
C. drinking
D. None of the above.
D. None of the above.
400
Observe the image and make one observation and one inference based on your observation from the image.
1 observation (5 senses)
1 inference (explaination)
400
A graduated cylinder contains exactly 60 mL of water. A rock was dropped into the cylinder of water. The water level rose to 86 mL. What is the volume of the rock?
26 mL
(answer must include units!)
400
An object with which of the following densities will float on water?
0.7 g/cm3
1.2 g/cm3
3.5 g/cm3
11.4 g/cm3
0.7 g/cm3
500
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
The type of liquid
500
Identify 2 unsafe lab procedures from the image below and how to correct them.
Identify 2 scenarios AND how to correct them.
500
Observe the image below.
Make 2 quantitative observations, 2 qualitative observations and one inference based on your observations.
500
A student used a metric ruler to measure the sides of a block of wood. The measurements were measured as 3.54 cm, 2.7 cm, and 4.85 cm. Calculate the volume of this piece of wood. To the nearest hundredth place with correct units.
46.4cm3
500
The diagram below represents a solid object with a mass of 325 grams. Determine the density of the cube to the nearest TENTH.
2.0 g/cm3