Variables
What is the variable that a scientist deliberately changes in an experiment?
Independent variable
What is it called when a scientist repeats their own experiment multiple times?
Repetition
What is it called when scientists are describing patterns or relationships in nature that consistently occur?
What do scientists create as an educated guess based on observations before testing?
Hypothesis
How can a model be useful in scientific investigations?
A. It can replace the need for experiments
B. It provides exact predictions
C. It helps in relating the results of investigations
D. It eliminates the need for data collection
C. It helps in relating the results of investigations
What is the variable that is measured as a result of the experiment?
Dependent variable
What is it called when a different scientist performs the same experiment?
Replication
What is it called when scientists explain how or why something happens?
Scientific theories
True or false: A conclusion can lead to a new hypothesis if unexpected results are found.
A. Write a detailed report
B. Summarize the findings in a paragraph
C. Discuss the results with classmates
D. Create a chart of table to compare the results
D. Create a chart of table to compare the results
Independent- amount of sunlight
Dependent- plant growth
Control- type of soil/ type of plant
When designing a study, why is it important to use repeated trials?
A. To ensure the study is completed quickly
B. To reduce the number of variables
C. To increase the reliability of the results
D. The simplify data analysis
C. To increase the reliability of the results
Give an example of a scientific law
Law of Gravity
Laws of Conservation of Mass and Energy
What is the value of a hypothesis in scientific investigations, even if it is not supported by data?
A. It can lead to further investigations
B. It confirms the initial theory
C. It proves the experiment was incorrect
D. It is discarded immediately
A. It can lead to further investigations
Why is scientific knowledge considered to be dependable?
A. It is published in reputable sources
B. It can change if new evidence comes about
C. It has many different areas that can be studied
D. It shows the reasons why the natural world works in certain ways
B. It can change if new evidence comes about
In an experiment testing how temperature affects the dissolving rate of sugar, name a possible control variable.
Amount of sugar used, amount of water, type of sugar
A. To ensure the water is pure
B. To confirm the consistency of the results
C. To use different types of water
D. To test different altitudes
B. To confirm the consistency of the results
True or false: A theory becomes a law when it is proven.
False
Explain why a hypothesis that is not supported by data is still valuable in scientific research
A. It confirms the original theory
B. It is discarded and not used again
C. It can be used to prove other hypotheses
D. It helps refine the research question
D. It helps refine the research question
Which of these claims best describes how scientific ideas can change?
A. New evidence leads to modification of ideas
B. As a scientific idea changes, it eventually becomes a scientific theory and then a law
C. Scientific ideas rarely change, because they are based on extensive evidence
D. Scientists form opinions based on evidence and decide how the idea should change
A. New evidence leads to modification of ideas
A student claims that increasing the temperature of a liquid increases its evaporation rate. Design an experiment to test this hypothesis. What would be the dependent variable?
A. The rate of evaporation
B. The type of liquid used
C. The temperature of the liquid
D. The container used
A. The rate of evaporation
True or false- In order to avoid confusing or conflicting results, an experiment should not be repeated.
False
Identify which of these is most likely a scientific theory:
A. Objects fall when dropped
B. Matter is made of tiny particles called atoms
B- Atomic theory
What is the main goal of hypothesis testing?
A. To determine if a hypothesis is supported by data
B. To collect more data
C. To create a new hypothesis
D. To prove a hypothesis is correct
A. To determine if a hypothesis is supported by data
Empirical evidence is:
A. A well supported explanation of nature
B. Conducting an experiment
C. All the measurements and data scientists gather in support of a scientific explanation
C. All the measurements and data scientists gather in support of a scientific explanation