Which Is a Physical Change

question 11

Multiple Choice

Which is a physical change?

• A)A piece of wood is burned
• B)A nail rusts
• C)A rubber band is stretched
• D)A firecracker explodes

Recognize employer responsibilities under OSHA to maintain a safe workplace.

Identify the components included in OSHA standards and recognize elements not covered.

Understand the precautions and equipment recommended for procedures with high infection risks.

Recognize standard precautions used universally in healthcare to prevent disease transmission.

---

Definitions:

Randomized Block Design

An experimental design that groups subjects into blocks to account for variability among them and then randomly assigns treatments within these blocks.

Randomized Block Design

An experimental setup that groups experimental units into blocks to account for variability among them before testing different treatments.

Matched Pairs Experiment

An experimental design where pairs of subjects are matched based on certain characteristics before one member of each pair is randomly assigned to the treatment group and the other to the control.

Randomized Block Design

A statistical experiment design that attempts to remove the effects of known confounding variables by grouping similar experimental units together into blocks before randomly assigning treatments.