Chapter 1 test

Which two are examples of descriptive statistics? Report an Error Mean and standard deviation. Median and correlation. Variance and regression analysis. Hypothesis testing and histograms.

Mean and standard deviation.

Which of the following is the number that appears in the middle of the data? Skew. Median. Mean. Mode. Central Tendency.

Median.

What is the standard unit of length? Report an Error Meter Yard Kilometer Kilogram Mile

Meter

Which is a process that requires feedback from the scientific community? Report an Error Question Experiment Peer review Conclusion

Peer review

Which of the following is a way that scientists check each other's work and look for weaknesses? Report an Error Modeling Laws Peer review Statistics

Peer review

Which two methods are used to help attach the stain to the cell structures? Report an Error Permebilization and mordant application Mounting medium and fixative application Mordant and fixative application Alcohol & acetic acid mixture

Permebilization and mordant application

How many mL are in 3.4 L? Report an Error 0.0034 mL 3,400,000 mL 3.4 mL 3,400 mL 0.34 mL

3,400 mL

The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide? Report your answer with the correct number of significant figures. 51.74 cm^2 51.744 cm^2 50 cm^2 52 cm^2 51.7 cm^2

52 cm^2

If you add 50.0 mL of water to a beaker containing 22 mL of water, then how much water do you have in the beaker? 70.0 mL 72 mL 70 mL 72.0 mL 70. mL

72 mL

A single assertion, a proposed explanation of something based on available knowledge, for something yet to be explained, one that is subject to further experimentation is called: A theory Statistical significance A hypothesis Scientific research Peer review

A hypothesis

Which piece of equipment is used to see very small specimens and samples? Report an Error A hot plate A microscope Scissors An eyedropper Protective eyewear

A microscope

What might you use to run a reaction or observe substances in the lab? A Bunsen burner A test tube A thermometer A large beaker A graduated pipette

A test tube

What is central tendency? A way of avoiding collecting data. A way of summarizing some data with a single number. A way of summarizing some data with three numbers. A way of summarizing some data with a series of numbers.

A way of summarizing some data with a single number.

How do descriptive and inferential statistics differ? Report an Error Inferential statistics only attempt to describe data, while descriptive statistics attempt to make predictions based on data. Inferential statistics are more computationally sophisticated than descriptive statistics. Descriptive statistics only attempt to describe data, while inferential statistics attempt to make predictions based on data. Descriptive statistics are more computationally sophisticated than inferential statistics.

Descriptive statistics only attempt to describe data, while inferential statistics attempt to make predictions based on data.

Which type of slides are the easiest to prepare? Dry mount Prepared mount Electron Wet mount

Dry mount

. Which of the following is NOT a unifying principle in science? Facts are facts, and they cannot be challenged The world is best explained by collecting data and doing observations All knowledge is open to being disproved if new evidence presents itself Humans are unreliable and we need processes to reduce bias

Facts are facts, and they cannot be challenged

When dispensing a drug, which of the following may need to be noted? I. The amount dispensed II. Who dispensed it III. The name of the drug dispensed Report an Error II only I only III only I, II, III

I, II, III

What's the best way to store light-sensitive substances? Report an Error In a fume hood In a refrigerator within a clear container In a clear container stored in the corner of a regular room In a dark container, such as a dark brown/tinted beaker made of thick glass, that's stored in a dark room

In a dark container, such as a dark brown/tinted beaker made of thick glass, that's stored in a dark room

if a statement is statistically significant, then: Report an Error It is unlikely to have occurred due to chance alone It's likely to have occurred due to chance alone None of these answers are correct It didn't occur at all It occurred due to chance

It is unlikely to have occurred due to chance alone

What is the standard unit of mass? Report an Error Kilogram Weight Pound Newton Quart

Kilogram

What should you do with substances that are heating? Report an Error Set the heat to low so that it takes a long time to heat Leave them until they boil, then come back Work on other things and check them periodically None are correct Stay with them at all times

Stay with them at all times

What should you do if a substance is not labelled? Put a new label on it if you can guess what it is Tell your lab instructor Taste it to find out what it is Throw it in the trash Mix it with something to see if it reacts

Tell your lab instructor

Dr. Patel does an experiment in which she shows people either a happy movie, a sad movie, or no movie in a classroom. Then, she asks them to fill out a survey assessing their feelings about whether they want to adopt a pet from the animal shelter. In this experiment, what was the control group? The larger population of people who live in that town The people who watched no movie The people who watched the happy movie The people who watched the sad movie The group of pets who are currently in the animal shelter

The people who watched no movie

What is science? None of the other answers are correct. The study of the meaning behind the universe. The study of the natural world through a process of systematic experimentation and observation. A body of knowledge about the way the natural world works.

The study of the natural world through a process of systematic experimentation and observation.

Dr. Patel does an experiment in which she shows people either a happy movie, a sad movie, or no movie in a classroom. Then, she asks them to fill out a survey assessing their feelings about whether they want to adopt a pet from the animal shelter. In this experiment, what is the DEPENDENT variable? Report an Error The type of movie viewed The participants How long the movie lasts The classroom location Their feelings about pet adoption

Their feelings about pet adoption

What is the purpose of a ventilation hood? Report an Error None are correct To contain lab fires To provide a safe breathing area if there is a lab explosion To contain gases, fumes, and vapors To reduce the risk of explosion

To contain gases, fumes, and vapors

. What is the main goal of the scientific method? Report an Error To allow accurate measurement To show people that data is the best way to learn about a phenomena To help humans collect and analyze data in a consistent, unbiased way To collect as much data as possible

To help humans collect and analyze data in a consistent, unbiased way

Which of the following games had the highest percentage according to the following pie chart? What percentage did that game have? Report an Error Monopoly at 29% Uno at 33% Uno at about 25% Checkers at 10%

Uno at 33%

A researcher performed a study in which she concluded that children who have parents who read to them at home have better reading skills at school. However, she only included children in the top reading level at school, and no children who have trouble reading. Because she only included one group, and not all groups of children, her study probably has a low level of _____. external validity ecological validity reliability internal validity face validity

external validity

13. Which of the following are arranged from smallest unit to largest unit? Report an Error cm, m, mm, km mm, cm, m, km cm, mm, m, km mm, m, cm, km km, m, cm, mm

mm, cm, m, km