Pre Assessment

Read the question from your test paper.

Carmen did an experiment to learn whether fish grew larger in cooler water.
Once a week she weighed the fish and recorded the data. What could have improved her experiment?

Which of the following steps of the scientific method should be completed before all the others?

The process of obtaining information by using the senses is called a(n)

How many variables should be manipulated in a correctly performed scientific experiment?

While getting a beaker from the shelf, Robert dropped the beaker and it broke. What should Robert do first?

What is the correct order of the scientific method?

Which science process skill involves guessing what might happen in the future?

To make sure experimental results are valid, which of the procedures must be followed?

A student has a wagon of a certain mass. He plans to investigate how the acceleration of the wagon changes as the force he exerts on it increases. In his investigation, the independent variable is

Which is not a part of a well-designed experiment?

A scientist studying giraffes hypothesizes that the average length of a giraffes neck is 1.8 meters. Which of the following sample sizes would give her the most valid results?

A scientist hypothesizes that the temperature at which an alligator’s egg is incubated will determine whether the alligator will be male or female. The dependent variable is

A scientists plants two rows of corn for experimentation. She puts fertilizer on row 1 but does not fertilize row 2. Both rows receive the same amount of water and light intensity. She checks growth of the corn over the course of 5 months. What is the constant in the experiment?

After completing an experiment, Kelly realizes her results are inconsistent. What might she do next to make her results more valid?

Constants are variables that are kept the same throughout an experiment in order to

A student will measure and record the growth of two flowering plants every other day for 10 days.

Use the picture from the test on question 34.

According to the diagram, which question is being tested?

A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the independent variable is

In a well-designed experiment, there is ___ independent variable, ____ dependent variable, and ____ constants or controlled variables.

In a controlled experiment, the variable that is changed to test the hypothesis is called the

The ball had a mass of 12 grams. This is an example of a(n):

Which is correct lab safety?

The soccer player wanted to see if he would win his game if he wore his lucky socks. This is an example of a(n)

The boy has on a blue jacket because it is cold outside. This is an example of a(n)

The chart below shows the results of an experiment designed to study how exercise affects heart rate.

Activity Stage Heart Rate of Person A (beats per min.) Heart Rate of Person B (beats per min) Heart Rate of Person C (beats per min)
Before Exercise 75 62 70
After Exercise 120 110 130

Which of the following statements is the BEST conclusion for this experiment?

A series of steps designed to help you solve problems and answer questions

After scientists analyze the results of their experiments, they

The boy has on a blue jacket. This is an example of a(n):

The process of obtaining information by using the senses is called a(n)

An experiment for a new asthma medication was set up into two groups. Group one was given the new drug for asthma, while group 2 was a given a sugar pill. The sugar pill serves as a

What happens to the dependent variable in a controlled experiment?

In science, an educated guess is called a(n)

Why is it important to identify and control variables in a scientific investigation?

A student wants to perform an experiment to test how much water bean plants need for good growth. Which of the following factors should be changed?

The measurable factor in an experiment is known as the