biology lab 1, 2

In your lab report, the _________ section is where you share the strategy for your experimen

Methods

What do you do in the experiment phase of the scientific method?

carry out the strategy and collect measurements

In an experiment, the variable that you will measure is the ____________ variable.

dependent

Suppose you study how speed affects the braking distance of a car. Match each part of the hypothesis phase with its output.

1. Formulate the hypothesis - Braking distance grows proportionally with speed.2. Choose a scope - We will focus on how braking distance depends on speed.3. Make a strategy for testing the hypothesis - We will brake at various speeds but keep the car and other factors constant.

What do you do in each phase?

1. Hypothesis - create a strategy formulate a hypothesis 2. Experiment - carry out the strategy collect measurements. 3. Analysis - draw graphs, evaluate the hypothesis. 4. Report - document your results; compose a report.

How many phases make up the scientific method?

4

Why is the testing strategy important in the design of an experiment?

A good strategy will produce accurate results.

Where can you perform the experiment phase of the scientific method?

Anywhere depending upon the problem being examined.

What would be natural to do in the experiment phase if the hypothesis is: "The heavier the ball, the faster it falls"?

Drop different balls from a fixed height • Measure the weight and the falling times of different balls

When formulating a hypothesis, it is important to determine the scope, then pick four or five factors to focus on. True

False

Which statement regarding the scientific method is false?

Original hypotheses are formed after an experiment.

When graphing your data, it is important to

Place the dependent variable on the X-axis *****Place the dependent variable on the Y-axis******* never try to use a bar graph utilize 3-D effects to enhance the appearance of your graph

Suppose you have the speed on the x axis and braking distance on the y axis, which graph would confirm the hypothesis "Braking distance is proportional to speed?"

Points on a straight line through (0,0) progressing upward and to the right

Suppose you have the speed on the x- axis and braking distance on the y-axis. Which graph would confirm the hypothesis Braking distance is proportional to speed?

Points on a straight line through (0,0) progressing upward and to the right

What would be natural to do in the experiment phase if your hypothesis is: "The braking distance grows linearly with speed"?

Record the braking distance at different speeds • Accelerate the car to different speeds in multiple trials • Measure the distance covered while braking

Where can you perform the experiment phase of the scientiific method?

Scientific experimentation can occur anywhere, depending upon the problem being examined

The hypothesis is: "The braking distance grows linearly with speed". What is commonly graphed on the x-axis on the graph?

Speed

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. Which is a good hypothesis for this tadpole experiment?

Tadpoles will be larger if fed a meat-based diet.

Which is true of the independent variable of an experiment?

The independent variable remains the independent variable throughout the experiment.

When determining the scope of an experiment, you need to consider (check all that apply)

What results to report The factor that will vary

what should your hypothesis represent?

a possible explanation for a problem or observation

.In the analysis phase, you will need to

analyze your data and place it on a graph

In the analysis phase, you will need to

analyze your data and place it on a graph

According to the convention, in the example where the hypothesis is: " The braking distance grows linearly with the speed", what usually will be graphed on the y axis?

breaking distance

According to the lab, formulating a true hypothesis is far less important than:

coming up with a good strategy to test the hypothesis

What do you do in the hypothesis phase of the scientific method?

create a strategy and formulate a hypothesis

When utilizing the scientific method, there are two types of variables. They are:

dependent and independent

When graphing your data, it is important that you

place the independent variable on the X-axis

What do you do in the report phase of the scientific method?

share your results and compose a report

In your lab report, the _________ section is where you share the strategy for your experiment.

methods

which question can you ask yourself to determine the dependent variable of an experiment?

which will I measure in the experiment?

What do you do in the LabSmart experiment phase?

• Carry out the strategy chosen in the hypothesis phase • Collect measurements in the notebook

What do you do in the analysis phase?

** Make calculations based on the raw measurements *** Graph the results

A hypothesis must be:

testable

What would be natural to do in the experiment phase if your hypothesis is: " The breaking distance grows linearly with speed"?

** Record the breaking distance at different speeds ** Accelerate the car to different speeds in multiple trial. **Measure the distance covered by braking

What would be natural to do in the experiment phase if the hypothesis is: " The heavier the ball, the faster it falls"?

***Drop different balls from a fixed height ***Measure the weight and the falling times of

Which of these topics belongs in a scientific paper?

***Methods (procedures) ****Introduction ***Results

What do you do in the lab smart experiment phase?

**Carry out the strategy chosen in the hypothesis phase ** Collect measurements in the notebook

Which of the following are phases in LearnSmart Labs' 4-phase model of the scientific method?

**experiment ***hypothesis

what is require of scientific result?

**it must be open to revision in the light of new date **It has been tested using the scientific methed

Why do scientists put so much effort into documenting their experiment and analysis?

Because other researchers must be able to repeat the experiment in order to check the results

According to convention, in the example where the hypothesis is: "The braking distance grows linearly with the speed", what usually will be graphed on the y- axis?

Braking distance

Which question can you ask yourself to determine the dependent variable of an experiment?

Which will I measure in the experiment?

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the independent variable for the tadpole diet experiment?

diet

What do you do in the analysis phase of the scientific method?

draw graphs, evaluate results, and evaluate the hypothesis

In the _________ phase, you will carry out the strategy you developed for testing the hypothesis.

experiment

In the _________ phase, you will carry out the strategy you developed for testing the hypothesis. analysis

experiment

Formulating a hypothesis is the one and only thing that distinguishes a scientist from an astrologist.

false

If the hypothesis in a scientific experiment is not supported, the experiment is considered a complete failure and must be repeated until a satisfactory outcome is reached.

false

Making sure that you come up with a hypothesis that makes a true statement is by far the most important aspect of the scientific method.

false

Scientists are the only individuals who use the scientific method.

false

When formulating a hypothesis, it is important to determine the scope, then pick four or five factors to focus on.

false

You do not need to pause to record your data as you perform your experiment. You can go back and estimate the values when the experiment is complete.

false

A/An ___________ should be based on background knowledge and observations.

hypothesis

Place the 4 phases of Scientific method in order:

hypothesis experiment analysis report

According to your lab, the variable that you manipulate during the experiment (the one that "varies"), is the _____________ variable.

independent

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the dependent variable for the tadpole diet experiment?

size of tadpoles

Suppose your hypothesis is "braking distance grows linearly with speed". What is the independent variable? let make a strategy. which factor will you vary in order to test the hypothesis?

speed

Suppose your hypothesis is: "Braking distance grows linearly with speed". What is the independent variable?

speed

Suppose your hypothesis is: "Braking distance grows linearly with speed." What is the independent variable?

speed

Suppose your hypothesis is: "The braking distance grows linearly with speed". Now let's make a strategy. Which factor will you vary in order to test the hypothesis?

speed

The Hypothesis is; "The braking distance grows linearly with speed" What is commonly graphed on the x axis of the graph?

speed

In order to be of scientific value, it is important that a hypothesis should be ___. testable.

testable.

When you formulate your hypothesis, it is important to be sure that it is an idea that can be ______.

tested by scientific experimentation

Science is about coming up with a hypothesis and

testing it

You should use the graph generated from your data to see if your hypothesis is supported.

true