Solids, Liquids,
Gas
Gas
This state of matter keeps its shape and has particles packed tightly together.
What is a solid?
Making a careful note about how many plants grew is called this type of data gathering.
What is an observation?
C In an experiment, the group that does NOT get the test treatment and is used for comparison is called this.
What is the control group?
The first step of most investigations when you ask what you want to learn is called this.
What is defining a problem or asking a question?
The tiny particles that make up all matter are called these.
What are atoms?
This state of matter takes the shape of its container and its particles can slide past each other.
What is a liquid?)
A test where you change one thing to see the effect is called this.
What is an experiment?
Why is a control group important?
What: It provides a baseline to compare results and helps show whether the variable caused the change?
What term describes making a best guess about what will happen before an experiment?
What is a prediction or hypothesis?
True or False — Atoms can be seen with your eyes.
What: False?
This state of matter fills the whole container and its particles move freely and spread apart.
What is a gas?
Is the statement "Blue is the best color" an observation or an opinion?
What is an opinion?
In a plant growth test comparing fertilizer A and no fertilizer, which is the control? (What: The plants with no fertilizer?)
What: The plants with no fertilizer?
Why should scientists repeat trials in an experiment?
What: To make results more reliable and reduce chance errors?
If you have the same number of atoms packed more tightly in one sample than another, what property is different?
What is density?
Name two physical properties you could use to tell a solid from a liquid.
What are shape and volume? Or what are rigidity and flow?
Give an example of an observation you could make about water heated on a stove.
What is: "Bubbles formed" or "Steam rose" or "Water temperature increased"?
Name one variable you should keep the same in both experimental and control groups when testing effect of temperature on matter changes.
What: Amount of substance OR type of container OR initial temperature OR time?
True or False — All real scientific investigations must follow the exact steps of the “scientific method.” (What: False? Authentic investigations often differ from the rigid steps.)
What: False? Authentic investigations often differ from the rigid steps.
Explain how atoms behave differently in solids versus gases. (What: In solids atoms are closely packed and vibrate in place; in gases atoms move freely and far apart?)
What: In solids atoms are closely packed and vibrate in place; in gases atoms move freely and far apart?
Describe what happens to particles when a solid changes to a liquid and then to a gas.
Particles gain energy, move faster, break free of fixed positions to become a liquid, then move even faster and spread apart to become a gas?)
Explain why scientists write down repeated observations during an investigation ?
What: To ensure results are reliable and to look for patterns or errors; repeated observations increase confidence in findings?
You test how different cups of water freeze by placing one in the freezer and one on the counter. Is this a fair experiment? Explain and identify the control.
(What: Not fair if other variables differ; the control should be the cup kept at room temperature if testing freezing conditions, but to test freezing properly all other conditions (same water amount, same cups) must be equal. The control could be the cup not placed in the freezer if that’s the intended comparison
Give two examples of reference materials a student could use to support understanding before planning an investigation. (What: Science textbooks, reputable websites, encyclopedias, scientific journals, or library books?)
What: Science textbooks, reputable websites, encyclopedias, scientific journals, or library books?
Draw a simple idea (describe in words) of how the arrangement of atoms changes during melting and evaporation. (What: During melting, atoms move from a fixed, close arrangement to a looser arrangement that can move past each other; during evaporation, atoms move even farther apart and move freely as a gas?
What: During melting, atoms move from a fixed, close arrangement to a looser arrangement that can move past each other; during evaporation, atoms move even farther apart and move freely as a gas?