Identify the term that matches each definition. The front vent of a fume hood, which helps maintain proper air circulation.
The horizontal, flat area of a fume hood upon which experiments are carried out.
A characteristic that describes substances that evaporate readily, producing large amounts of vapors.
The glass panel in front of the fume hood that shields the user from fumes and other hazard.
A. Airfoil.
B. Sash.
C. Work surface.
D. Volatile.

A,

C.

D.

B.

Explanation:

The front vent of a fume hood that assists and maintain proper air circulation is Airfoil

The horizontal flat surface area of the fume hood where experiments are being carried out is Work  Surface.

The main characteristics which demonstrate and describes how substances evaporate rapidly and readily into the thin air while producing a huge amount of vapor is known as Volatile

In front of the fume hood, lies the glass panel whose main purpose is to shield the user from the hazardous substance. This glass panel is known as the Sash.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e