Science Flashcards
7 cards from real TASC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Science flashcards as text
Which subatomic particle has a negative electric charge?
Answer: Electron
Electrons carry a negative charge and orbit the nucleus of an atom.
What is the term for a substance made of two or more elements chemically combined?
Answer: Compound
A compound forms when elements bond chemically in a fixed ratio.
When water changes from a liquid to a gas, this physical change is called what?
Answer: Evaporation
Evaporation is the change from liquid to gas at the surface of a liquid.
On the periodic table, elements in the same vertical column are called a what?
Answer: Group
Elements in the same vertical column form a group and share similar properties.
Which type of chemical reaction releases energy, often as heat?
Answer: Exothermic
Exothermic reactions release energy, usually in the form of heat, to the surroundings.
What does the pH scale measure in a solution?
Answer: Acidity or basicity
The pH scale measures how acidic or basic a solution is, from 0 to 14.
In a chemical equation, the substances present before the reaction occurs are called the what?
Answer: Reactants
Reactants are the starting substances that are transformed into products.