This is the trial in the experiment that receives no treatment or is left under "normal" conditions.
What is the control group?
100
These are the numbers of electrons that can fit in the first and second energy levels of an atom?
What is 2 and 8?
100
These are three signs that a chemical reaction may have taken place.
What is color change, production of heat or light, and the formulation of a new gas, liquid, or solid?
100
This is the reason why oil does not dissolve in water.
What is "like dissolves like"? Water is polar, oil is nonpolar.
100
This macromolecule provides the body with fast, easily accessible energy.
What is a carbohydrate?
200
This part of the scientific method is written in "If, then...because" format.
What is the hypothesis?
200
In this type of bond, electrons are shared by two different atoms?
What is a covalent bond?
200
This is the minimum amount of energy required for a reaction to take place.
What is the activation energy?
200
This type of bond holds hydrogen and oxygen together within a water molecule.
What is a covalent bond?
200
These are monomers of proteins.
What are amino acids?
300
This is the variable that the scientist controls.
What is the independent variable?
300
Two or more atoms of the same element that differ in the number of neutrons are called this.
What are isotopes?
300
This is what enzymes do.
What is increase the rate of chemical reactions (decrease activation energy)?
300
This property of water means that regions of the molecule have opposite charges.
What is polarity?
300
This type of macromolecule stores genetic information.
What are nucleic acids?
400
This is the variable represented by the data collected in the experiment.
What is the dependent variable?
400
This is how ions are formed.
What is atoms gain or lose electrons, becoming negatively or positively charged?
400
In the following diagram, is energy being released or absorbed? How do you know?
What is absorbed? The energy of the products is greater than the energy of the reactants. The reaction is endothermic.
400
These are loose interactions between hydrogen and oxygen atoms of adjacent water molecules.
What are hydrogen bonds?
400
Energy is stored in the liver and muscles glycogen. Glycogen is a type of this macromolecule.
What is carbohydrate?
500
These represent the four components of a conclusion.
What is restating the hypothesis, stating whether the hypothesis was supported, discussing ALL data (including control), and writing a final summary sentence?
500
This is a pure substance formed by two or more atoms.
What is a compound?
500
In the following diagram, is energy being released or absorbed? How do you know?
What is released? The energy of the reactants is greater than the energy of the products. The reaction is exothermic.
500
Why does a meniscus form at the top of a column of water in a graduated cylinder?
Adhesion to the side of the cylinder draws water molecules up.
500
Which of the following lipids is a saturated fat? How do you know?
A. The lipid with only single bonds is saturated. (Double bonds would indicate an unsaturated fat).