Key Model Ideas
According to our model, all matter is made up of these tiny pieces.
What are particles?
In CER, this part explains why your evidence supports your claim using scientific ideas.
What is reasoning?
When a bath bomb is placed in water, students observed bubbles forming. The occurence of bubbles indicated that this type of matter is being produced.
What is a gas?
The state of matter at room temperature can be a property used to identify a ____.
What is a substance?
A fit of clothing that shouldn't be worn during labs.
What is loose?
Name the two things that all matter has.
What is mass and volume?
A student writes: “The gas came from matter that was already in the system.” Is this a claim, evidence, or reasoning?
What is a claim?
A bath bomb is a solid before it enters the water. What state of matter is the water?
What is liquid?
The temperature at which a solid becomes a liquid.
What is a melting point?
Something that is a major NEIGH in a laboratory setting.
What is horseplay?
A student says, “Air isn't matter because we can't see it.” The Key Model Idea that proves the student is incorrect is this.
What is gases, liquids, and solids are all made up of matter?
A student writes: “The mass decreased from 50 g to 46 g while the container was open.” What part of CER is this, and why?
What is Evidence? It is a measurement/data point that supports a claim.
The 3 substances that mix together to form bubbles.
What is citric acid, baking soda, and water?
A scientist wants to identify an unknown substance involved in the bath bomb investigation. Name two properties that could be compared with a known substance.
What is Density, solubility, odor, appearance, or state at room temperature?
During a lab, long hair should be styled in this way.
What is tied back/ponytail?
A sealed container holds a substance before and after an investigation. If no matter can enter or leave, this should happen to the total mass.
What is the mass should stay the same?
A student has evidence that the mass of a system stayed the same in a closed container. Which Key Model Idea could be used in the reasoning?
What is in a closed system, no matter can get in or out, so the mass stays the same.
Two properties that can be used to identify the bath bomb gas.
What is density and flammability?
A gas is less dense than the gas surrounding it. The direction will it tend to move is...
What is upward?
A student accidentally gets a substance on their skin. The first thing they should do is...
What is immediately tell the instructor/teacher?
A container has an opening through which gas can escape. This is a ________ system.
What is open?
A student writes: “The bath bomb produced a gas. The bubbles appeared during the investigation. Gases are matter and take up space.” What important part of CER is missing?
What is reasoning?
The property of matter we investigated when testing the individual ingredients in water.
What is solubility?
If two samples are the same substance, their properties should ____.
What is match?
The length of time you should rinse at the eye wash station if a chemical splash gets in your eyes
What is 20 minutes?