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Students were investigating some properties of rocks. They wanted to compare the volumes of the rocks.

Which tool should the students use to accurately measure the volume of each rock?

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Some researchers are developing a new fertilizer designed to improve the growth of plants in hot, dry climates. The fertilizer was applied to one hundred desert plants in a greenhouse. The average daytime temperature in the greenhouse was 90°F, and the humidity levels were low. Which is best for the researchers to do next?

• A compare plants that received fertilizer to similar plants that received none

• B begin selling the fertilizer to gardeners living in hot, dry climates

• C change the conditions in the greenhouse and retest the fertilizer

• D test the fertilizer on plants that are adapted to cooler climates

Answer explanation

The best next step is to compare plants that received the fertilizer to similar plants that received none. This will help determine the fertilizer's effectiveness in promoting growth under the specific conditions tested.

How many variables should be tested at a time?

• Three

• Zero

• Two

• One

Answer explanation

Testing one variable at a time allows for clear identification of its effect on the outcome. This method minimizes confusion and ensures accurate results, making 'One' the correct choice.

What is the first step in the scientific method?

• Make an observation --> Question

• Design and conduct an experiment

• Make an hypothesis

• Share your results

Answer explanation

The first step in the scientific method is to make an observation, which leads to a question. This foundational step is crucial for guiding the research process and forming hypotheses.

The summary at the end of an experiment that explains the results is... 

• conclusion

• procedures

• materials

• responding variable

Answer explanation

The summary at the end of an experiment that explains the results is called a conclusion. It synthesizes the findings and provides insights based on the data collected during the experiment.

To solve a problem or answer a question by following the scientific method

• Investigate

• Experiment

• Observation

• Variable

Answer explanation

To solve a problem using the scientific method, one must first investigate the issue. This involves gathering information and understanding the context before proceeding to experimentation or observation.

What is the process scientists use when planning an experiment?

• Scientific Questioning

• Scientific Method

• They just guess

• Scientific Plan

Answer explanation

The correct choice is 'Scientific Method' because it is the systematic process scientists use to plan and conduct experiments, involving steps like asking questions, forming hypotheses, and testing them.

When you make an observation, you use which senses?

• speech

• hearing

• all 5 senses

• sight

Answer explanation

When making an observation, you can use all 5 senses: sight, hearing, touch, taste, and smell. Each sense provides different information about the environment, making 'all 5 senses' the correct choice.

Scientists ask _______________ to find answers.

• questions

• problems

• choices

• statements

Answer explanation

Scientists ask questions to explore and understand the world around them. Questions drive research and inquiry, making 'questions' the correct choice in this context.

The information you gather is called.....

• answers

• info

• information

• data

Answer explanation

The information you gather is referred to as 'data'. While 'information' is a broader term, in this context, 'data' specifically denotes the collected facts or figures.