Chemistry Quiz

What is a coefficient ?

• The color of the reactants

• The temperature of the reaction

• a number in front of a chemical formula in a equation that indicates how many

  molecules or atoms of each reactant and product are involved in a reaction

• The speed of the reaction

What is an endothermic reaction?

• A reaction that releases energy in the form of heat

• A reaction that absorbs or takes in energy in the form of heat

• A reaction that produces light

• A reaction that changes color

What is an exothermic reaction?

• A reaction that absorbs energy

• A reaction that releases energy outward in the form of heat

• A reaction that changes the state of matter

• A reaction that produces sound

What is matter?

• Anything that has mass and takes up space

• Anything that is invisible

• Anything that is weightless

• Anything that is liquid

What is a physical change?

• A change in a substance that changes its identity

• A change in a substance that does not change the identity

• A change that creates a new substance

• A change that absorbs energy

What is a closed system?

• A system in which matter can enter and escape

• A system in which no matter is allowed to enter or leave

• A system that is always open

• A system that changes color

What is an open system?

• A system in which no matter can enter or leave

• A system in which matter can enter and escape the surroundings

• A system that is always closed

• A system that absorbs energy

What is a product in a chemical reaction?

• A substance that is used up in a reaction

• A substance formed as a result of a chemical reaction

• A substance that changes color during a reaction

• A substance that absorbs energy

What is chemistry?

• The study of plants

• The study of properties of matter and how matter changes

• The study of animals

• The study of weather

What is a physical property?

• A characteristic that changes the substance

• A characteristic of a pure substance that can be observed without changing it into another substance

• A characteristic that absorbs energy

• A characteristic that releases energy