Science Sleuths
I am information you gather using your senses or a measuring tool. I am not a guess.
What is an observation?
In an experiment, I am the factor the scientist deliberately changes.
What is the independent variable?
Smallest part of an element that still has the properties of that element?
What is atom?
What is the chemical formula for water?
What is H2O
What are the four major macromolecules?
What is Carbohydrates, Lipids, Proteins, Nucleic Acids
A student says, “The classroom lights are off, so class must be over.”
What is an inference?
A scientist tests whether caffeine affects heart rate. The scientist measures each person’s heart rate after they drink different amounts of caffeine.
What is the dependent variable?
What are the 6 elements necessary for life?
CHONPS
Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulfur
Water molecules stick to other water molecules. Is this cohesion or adhesion?
What is cohesion
Which macromolecule provides quick energy
What is Carbohydrates?
A student notices that a plant near a window is growing toward the sunlight.
Question: Write a testable hypothesis about what the student observed.
What is : “If a plant receives more sunlight, then it will grow taller.”
A scientist keeps the amount of sunlight the same for every plant but changes the amount of water. What is this factor called?
What is a constant?
A substance mixes easily with water. Scientists describe it as “water-loving.”
What is hydrophilic?
Water sticks to the side of a glass. What property of water is this
What is adhesion
List the order in which macromolecules are used for energy
What is Carbohydrates, Lipids, Proteins
A thermometer reads 22°C, but the actual room temperature is 25°C. What type of observation is this?
What is quantitative observation?
A scientist gives one group of plants fertilizer and another group no fertilizer. What is the group without fertilizer called?
What is a control group?
Water has a slightly positive end and a slightly negative end (unequal distribution). Is water polar or nonpolar?
Polar
What property allows some insects to walk across the surface of water?
What is surface tension (cohesion)
I am built from amino acids. Some of my members help build muscle, while others act as enzymes.
What are proteins?
A student measures the same object three times and gets these results:
12.1 cm
12.1 cm
12.2 cm
The actual length is 15.0 cm.
Question: Are the measurements accurate, precise, both, or neither?
What is precise but not accurate?
A student tests whether water temperature affects how fast sugar dissolves. The student uses cold water with one spoonful of sugar and hot water with three spoonfuls. What should the student change to make the experiment fair?
What is use the same amount of sugar in both cups
Explain why oil and water do not mix
what is oil is nonpolar and hydrophobic
A pond freezes on top during winter, but fish can survive in the liquid water below the ice.
What is water as a solid is less dense than liquid water
A phospholipid has a water-loving head and water-fearing tails. What is one important job of phospholipids in a cell?
What is the cell membrane, controls what enters and leaves the cell