Physical & Chemical Changes; States of Matter; Life Processes (MRS GREN)

Flashcards reviewing distinctions between physical and chemical changes, state changes of matter, and the seven essential life processes remembered by MRS GREN.

What is a physical change?

A change that alters a substance’s appearance but does not create a new substance (e.g., squishing, heating, crushing).

Give three examples of physical changes.

Squishing, heating, and crushing a material.

What is a chemical change?

A change in which a substance is transformed into a different substance through a chemical reaction (e.g., burning, decomposing, rusting).

Give three examples of chemical changes.

Burning, decomposing, and rusting.

Which change of state goes directly from solid to gas?

Sublimation.

What is evaporation?

The change of state from liquid to gas.

What is melting?

The change of state from solid to liquid.

What is condensation?

The change of state from gas to liquid.

What is freezing?

The change of state from liquid to solid.

In biology, what does Movement refer to?

Living things changing position or moving parts of their bodies.

Define respiration in living organisms.

Getting energy by breaking down food while using oxygen.

What is sensitivity?

Noticing and responding to changes in the environment.

What is growth?

When living things get bigger and develop.

What is reproduction?

Making new living things of the same kind.

What is excretion?

Removing waste products from the body.

What is nutrition?

Taking in food to obtain energy and grow.

What acronym summarizes the seven life processes?

MRS GREN (Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition).