Quiz about Scientific Experiments and Variables Worksheet

Question 1

A student places bean plants in four different rooms with varying amounts of light: no light, low light, medium light, and bright light. After three weeks, she measures the average plant height in each room. Which conclusion is best supported by this setup?

Accepted Answer

The independent variable is the amount of light, and the dependent variable is the plant height.

Answer

The independent variable is the plant height, and the dependent variable is the light level.

Answer

The dependent variable is the amount of water given, and the independent variable is the amount of light.

Answer

The experiment cannot show a relationship between light and plant growth.

Question 2

A teacher gives two groups of students different types of pencils (mechanical vs. wooden) and asks them to write an essay. She then measures the number of words each student writes.

Which of the following is the dependent variable in this experiment?

Accepted Answer

The number of words in the essay.

Answer

The type of pencil used.

Answer

The grade level of the students.

Answer

The length of time students were given.

Question 3

A biologist tests the effect of fertilizer on tomato growth. She grows 20 plants with fertilizer and 20 without. She then measures the height of each plant after six weeks.

Which of the following would make the experiment more reliable?

Accepted Answer

Repeat the experiment multiple times with new plants.

Answer

Record only the tallest tomato plants in each group.

Answer

Test only one plant with fertilizer and one without.

Answer

Change the fertilizer type halfway through the experiment.

Question 4

Students conducted a survey about favorite ice cream flavors. Out of 100 students, 40 chose chocolate, 35 chose vanilla, 20 chose strawberry, and 5 chose other flavors. Which conclusion is supported by these results?

Accepted Answer

More students prefer vanilla than strawberry.

Answer

Strawberry is the most popular flavor.

Answer

Chocolate and vanilla are equally popular.

Answer

Other flavors are as popular as chocolate.

Question 5

A student repeats an experiment three times to measure how quickly sugar dissolves in hot water vs. cold water. Why is repeating the experiment important?

Accepted Answer

To ensure the results are consistent and reliable.

Answer

To prove that the hypothesis is correct.

Answer

To change the outcome of the experiment.

Answer

To reduce the amount of data collected.

Question 6

The graph below shows the number of hours teenagers spend on homework each week compared to their test scores. Based on the graph, what is the relationship between hours spent on homework and test scores?

Accepted Answer

Teenagers who spend more hours on homework tend to have higher test scores.

Answer

Teenagers who spend fewer hours on homework tend to have higher test scores.

Answer

There is no relationship between hours spent on homework and test scores.

Answer

Teenagers who spend more hours on homework tend to have lower test scores.

Question 7

Which conclusion is best supported?

Accepted Answer

More time on homework tends to be related to higher test scores.

Answer

Students who do more homework always earn perfect scores.

Answer

Homework causes students to learn less.

Answer

There is no relationship between homework and scores.

Question 8

A chemistry student places metal strips in different liquids to test how quickly they corrode. She records the time it takes for visible rust to appear. Which is the dependent variable in this experiment?

Accepted Answer

The time until rust appears.

Answer

The type of metal strip used.

Answer

The type of liquid used.

Answer

The size of the metal strip.

Question 9

Astronomers study the brightness and temperature of stars. They notice that blue stars are generally hotter than red stars. If a newly discovered star is very blue, what is the most reasonable prediction?

Accepted Answer

It has a very high surface temperature.

Answer

It has a low surface temperature.

Question 10

A scientist is testing a new type of fertilizer to see if it increases the height of tomato plants. She has three groups of plants: Group A receives no fertilizer, Group B receives the new fertilizer, and Group C receives a standard commercial fertilizer. All plants are grown in the same type of soil, receive the same amount of water and sunlight, and are kept at the same temperature. What is the independent variable in this experiment?

Accepted Answer

The type of fertilizer used on the plants

Answer

The amount of water and sunlight

Answer

The height of the tomato plants

Answer

The amount of soil in each pot

Question 11

A student is investigating how the mass of a paper airplane affects its flight distance. She constructs five airplanes identical in shape and size, but with different amounts of clay added to each to vary the mass. She throws each airplane three times and records the distance of each flight. Which of the following best describes a controlled variable in this experiment?

Accepted Answer

The shape and size of the airplanes

Answer

The amount of clay added to each airplane

Answer

The flight distance of the airplanes

Answer

The number of times each airplane is thrown

Question 12

An ecologist hypothesizes that the population of frogs in a pond is directly related to the amount of algae present. She records the amount of algae in the pond each week and counts the number of frogs. After several months, she finds that there is no consistent relationship between algae levels and the frog population. What is the most appropriate next step for the ecologist to take?

Accepted Answer

Report her findings and suggest further research to explore other factors.

Answer

Change her hypothesis to match the data she collected.

Answer

Conclude that there is no relationship between any environmental factors and the frog population.

Answer

Discard the data and start the experiment over.

Question 13

A pharmaceutical company is testing a new drug. They give the drug to a group of 100 patients and a placebo (a sugar pill with no medicinal value) to another group of 100 patients. They measure the effectiveness of the drug by recording the improvement in patients' symptoms over a period of three months. Why is it important for the company to use a placebo group in this experiment?

Accepted Answer

To provide a baseline for comparison and control for the placebo effect.

Answer

To ensure that all patients receive some form of treatment.

Answer

To increase the total number of patients in the study.

Answer

To allow for the company to have an ethical way of testing the drug.

Question 14

A biologist conducts an experiment to see if the type of soil affects the rate of plant growth. She plants identical seedlings in three different soil types and measures their height weekly for six weeks. She repeats this experiment for a total of four times. The main purpose of repeating the experiment is to:

Accepted Answer

Increase the reliability of the results.

Answer

Ensure that the results are the same every time.

Answer

Make the data easier to analyze.

Answer

Make the experiment more challenging.

Question 15

A student collected data on the number of hours of sleep and the test scores of their classmates. The student's graph showed a general trend that as the hours of sleep increased, the test scores also increased. Which conclusion is best supported by the data?

Accepted Answer

There is a positive correlation between hours of sleep and test scores.

Answer

There is no relationship between sleep and test scores.

Answer

Sleeping more hours guarantees a higher test score.

Answer

Sleeping more causes higher test scores.

Question 16

A scientist working on a cure for a disease publishes a paper with her findings. Another team of scientists in a different country attempts to replicate her experiment using the same methods, but they are unable to get the same results. What is a likely consequence of this situation?

Accepted Answer

The original scientist's findings will be questioned and may not be accepted until they can be replicated.

Answer

The original scientist's findings will be immediately accepted by the scientific community.

Question 17

Which of the following scenarios best demonstrates the concept of scientific peer review?

Accepted Answer

B. A team of researchers publishes their findings in a scientific journal after other experts in the field have critiqued the paper.

Answer

A. A scientist checks their data and calculations multiple times to avoid errors.

Answer

C. A student in a lab asks another student for help with an experiment.

Answer

D. A scientist gives a presentation about her work at a public conference.

Question 18

A group of geologists is studying earthquake patterns in a specific region. Based on the data they have collected over 50 years, they propose a model that can predict the probability of a major earthquake occurring in the next 10 years. What is the most reasonable prediction for a different region with similar geological features?

Accepted Answer

The new region will have the same probability of an earthquake as the first region.

Answer

The new region will have a major earthquake at exactly the same time as the first region.

Answer

The new region is guaranteed to have no earthquakes in the next 10 years.

Answer

The geologists cannot make any prediction for the new region without 50 years of data from that specific region.

Question 19

A food scientist is investigating how the amount of sugar affects the rise of bread. He bakes several loaves of bread, each with a different amount of sugar, and records the final volume of each loaf. Which statement correctly identifies the dependent and independent variables?

Accepted Answer

The independent variable is the amount of sugar, and the dependent variable is the volume of the bread.

Answer

The independent variable is the volume of the bread, and the dependent variable is the amount of sugar.

Answer

The independent variable is the amount of yeast, and the dependent variable is the amount of sugar.

Answer

Both the amount of sugar and the volume of the bread are independent variables.

Question 20

Randall wants to know if the amount of salt in the water has an effect on his goldfish. What is the independent variable?

Accepted Answer

amount of salt

Answer

amount of water

Answer

number of goldfish

Answer

health of the goldfish

Question 21

What is the label on the x axis?

Accepted Answer

Type of fertilizer

Answer

Average plant height

Answer

centimeters

Answer

The effect of plant height on fertilizer

Question 22

Which is the best title?

Accepted Answer

How many bubbles are formed each minute

Answer

Minutes of bubbles

Answer

Minutes per bubbles

Answer

Making lots of bubbles

Question 23

In the context of the scientific method, what does it mean to replicate an experiment?

Accepted Answer

To repeat the experiment to verify results

Answer

To change the hypothesis and test again

Answer

To alter the data to fit the hypothesis

Answer

To publish the findings in a journal

Question 24

Which claim could be supported with this data?

Accepted Answer

I think that Corn Pops have the lowest amount of iron.

Answer

I believe that Coco Puffs have the most iron.

Answer

Fruit loops are too sweet.

Answer

I think Cheerios are for babies.

Question 25

What can you conclude about the effect of the distance from the hoop (in meters) on the number of baskets made?

Accepted Answer

The farther away you are from the basket, the fewer baskets will be made.

Answer

The closer someone was to the basket, the fewer baskets he/she made.

Answer

There was no connection between the distance to the basket and the number of baskets made.

Question 26

Students in a science class are performing an experiment measuring the height a ball will bounce based on the location it is dropped from. Select the true statements based on the data collected.

Accepted Answer

Drop height does have an affect on bounce height.

Accepted Answer

The higher the drop location, the higher the ball bounced.

Answer

Drop height has no affect on bounce height.

Answer

The ball bounced higher when dropped from lower locations.

Answer

The type of ball is the independent variable.

Question 27

Jordan designs an experiment to test if giving bean plants extra fertilizer will make them grow faster. He predicts that plants with extra fertilizer will be taller. After six weeks, the plants with extra fertilizer average 18 cm tall, while the plants without fertilizer average 22 cm tall.

How could the results of his investigation be described in scientific terms?

Accepted Answer

The results of his investigation fail to support his hypothesis.

Answer

The results of his investigation support his hypothesis.

Answer

The results of his investigation prove his hypothesis is true.

Answer

The results of his investigation prove his hypothesis is false.

Scientific Experiments and Variables Worksheet

31 questions

A student places bean plants in four different rooms with varying amounts of light: no light, low light, medium light, and bright light. After three weeks, she measures the average plant height in each room. Which conclusion is best supported by this setup?

A teacher gives two groups of students different types of pencils (mechanical vs. wooden) and asks them to write an essay. She then measures the number of words each student writes.
Which of the following is the dependent variable in this experiment?

A biologist tests the effect of fertilizer on tomato growth. She grows 20 plants with fertilizer and 20 without. She then measures the height of each plant after six weeks.
Which of the following would make the experiment more reliable?

Students conducted a survey about favorite ice cream flavors. Out of 100 students, 40 chose chocolate, 35 chose vanilla, 20 chose strawberry, and 5 chose other flavors. Which conclusion is supported by these results?

A scientist states the following hypothesis: “Saltwater freezes at a lower temperature than freshwater.” She places equal amounts of freshwater and saltwater into a freezer and records the temperature at which each freezes.
What is the dependent variable in this experiment?

A student repeats an experiment three times to measure how quickly sugar dissolves in hot water vs. cold water. Why is repeating the experiment important?

The graph below shows the number of hours teenagers spend on homework each week compared to their test scores. Based on the graph, what is the relationship between hours spent on homework and test scores?

Which conclusion is best supported?

A group of scientists found that greenhouse gases trap heat in Earth’s atmosphere. Later experiments confirmed the same conclusion. What does this example show about science?

A chemistry student places metal strips in different liquids to test how quickly they corrode. She records the time it takes for visible rust to appear. Which is the dependent variable in this experiment?

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Scientific Experiments and Variables Worksheet

31 questions

A student places bean plants in four different rooms with varying amounts of light: no light, low light, medium light, and bright light. After three weeks, she measures the average plant height in each room. Which conclusion is best supported by this setup?

A teacher gives two groups of students different types of pencils (mechanical vs. wooden) and asks them to write an essay. She then measures the number of words each student writes. Which of the following is the dependent variable in this experiment?

A biologist tests the effect of fertilizer on tomato growth. She grows 20 plants with fertilizer and 20 without. She then measures the height of each plant after six weeks. Which of the following would make the experiment more reliable?

Students conducted a survey about favorite ice cream flavors. Out of 100 students, 40 chose chocolate, 35 chose vanilla, 20 chose strawberry, and 5 chose other flavors. Which conclusion is supported by these results?

A scientist states the following hypothesis: “Saltwater freezes at a lower temperature than freshwater.” She places equal amounts of freshwater and saltwater into a freezer and records the temperature at which each freezes.What is the dependent variable in this experiment?

A student repeats an experiment three times to measure how quickly sugar dissolves in hot water vs. cold water. Why is repeating the experiment important?

The graph below shows the number of hours teenagers spend on homework each week compared to their test scores. Based on the graph, what is the relationship between hours spent on homework and test scores?

Which conclusion is best supported?

A group of scientists found that greenhouse gases trap heat in Earth’s atmosphere. Later experiments confirmed the same conclusion. What does this example show about science?

A chemistry student places metal strips in different liquids to test how quickly they corrode. She records the time it takes for visible rust to appear. Which is the dependent variable in this experiment?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

A teacher gives two groups of students different types of pencils (mechanical vs. wooden) and asks them to write an essay. She then measures the number of words each student writes.
Which of the following is the dependent variable in this experiment?

A biologist tests the effect of fertilizer on tomato growth. She grows 20 plants with fertilizer and 20 without. She then measures the height of each plant after six weeks.
Which of the following would make the experiment more reliable?

A scientist states the following hypothesis: “Saltwater freezes at a lower temperature than freshwater.” She places equal amounts of freshwater and saltwater into a freezer and records the temperature at which each freezes.
What is the dependent variable in this experiment?