Hypothetically Speaking
Measure Twice, Pour Once
The Polar Express
Clingy Much?
Ice, Ice, Density
100
An educated, testable prediction made before conducting an experiment, such as predicting birds avoid a bird bath due to low water levels.
What is a hypothesis?
100
To measure the mass of a penny during a lab investigation, a student should use this scientific tool.
What is a scale (or digital balance)?
100
This chemical compound is the most abundant molecule found in living organisms.
What is water?
100
The strong attraction that draws water molecules toward other water molecules is known as this.
What is cohesion?
100
On the pH scale, a solution with a pH reading of 9 is classified as this.
What is a base (or basic/alkaline)?
200
In an experiment testing the effect of sunlight on grass growth, the amount of sunlight provided represents this variable.
What is the independent variable?
200
A student puts a Betta in a small tank, a goldfish in a medium tank, and a minnow in a large tank to test if tank size affects growth. To eliminate confounding variables, she must keep this factor constant.
What is the species/type of fish?
200
Water is classified as this type of molecule because it has a partial negative charge on the oxygen atom and partial positive charges on the hydrogen atoms.
What is a polar molecule?
200
This property, created by cohesive forces at the water's surface, allows water striders and other small insects to walk across ponds.
What is surface tension?
200
Water's ability to absorb large amounts of heat with minimal temperature change is known as having a high value for this property.
What is high specific heat (or high heat capacity)?
300
In an experiment measuring plant height after applying fertilizer, the height of the plant represents this variable.
What is the dependent variable?
300
Paige pours 80 mL of liquid into a 200 mL cylinder. If transferred to a 100 mL cylinder, the water level will rest at this measurement line.
What is 80 mL?
300
Water earned this nickname because its polarity allows it to dissolve a wide variety of substances.
What is the universal solvent?
300
Water creeping up the glass wall of a graduated cylinder or absorbing upward into a paper towel illustrates this property.
What is adhesion?
300
Deep lakes and ponds are prevented from freezing solid in winter because solid ice exhibits this density characteristic relative to liquid water.
What is being less dense than liquid water (it floats)?
400
In an experiment testing how E. coli reacts to antibiotics, a dish of bacteria receiving no antibiotic treatment serves as this critical setup.
What is the control group?
400
In an experiment testing water amounts and grass height, the results show: 
Based on the data, this specific amount of water represents the optimal dosage for plant growth (include units)
What is 30 mL/day?
400
Polar substances easily dissolve in water, but water is unable to dissolve these types of nonpolar substances.
What are fats/oils (lipids)?
400
Water absorbs heat as it changes from liquid to gas, allowing organisms to cool themselves through this process.
What is sweating? (AKA evaporative cooling)
400
While chicken liver in a pH 11 solution is in a basic environment, chicken liver in a pH 3 solution is in an acidic environment containing a high concentration of these ions.
What are hydrogen ions (H+)?
500
Stating that a plant group grew 5 cm taller on average compared to another group is an example of this type of data claim.
What is quantitative?
500
Claiming that "music helps plants grow" after observing three plants near a speaker is scientifically weak because the test lacks these two critical experimental criteria.
What are a control group and repeated trials?
500
These weak chemical bonds form between the partially positive hydrogen end of one water molecule and the partially negative oxygen end of another.
What are hydrogen bonds?
500
Capillary action allows water to travel upward against gravity in plant stems using these two properties working together.
What is cohesion and adhesion?
500
When liquid water expands into solid ice, its volume increases while this physical property stays exactly the same. (remember. Density decreases)
What is mass?