Georgia Standards: Physical and Chemical Changes

During a science fair, Ethan, Anika, and Grace are presenting a project on air quality. How can they detect pollutants in the air when the particles are too small to see?

• Through taste and smell sensors that can detect the particles.

• By listening to sound waves emitted by the particles.

• Using instruments like microscopes, spectrometers, and particle detectors.

• Using binoculars, telescopes, and magnifying glasses.

When water freezes into ice, what type of change does it undergo?

• When water freezes into ice, it undergoes a change in the weather

• When water freezes into ice, it undergoes a change in the state of mind

• When water freezes into ice, it undergoes a change in the speed of light

• When water freezes into ice, it undergoes a change in the form or appearance of the substance without changing its chemical composition.

When Jackson bakes a cake, what kind of change is happening to the ingredients?

• The change involves only physical alterations to the ingredients.

• The change is reversible, and the ingredients can be returned to their original state.

• The change does not result in new substances being created from the ingredients.

• The change involves the rearrangement of atoms in the ingredients to form a new substance with different properties.

Can you provide examples of chemical changes?

• Rusting of iron, burning of wood, cooking an egg, baking a cake

• Mixing salt and sugar

• Boiling water

• Freezing of water

During a science class, David, Liam, and Samuel are discussing the different states of matter that water can exist in. They also talk about a fourth state that is not commonly experienced in daily life. What are these states?

• solid, liquid, gas, plasma

• solid, liquid, gas, matter

• solid, liquid, gas, energy

• solid, liquid, gas, light

During a science class experiment, Noah and Luna observed a piece of ice melting into water. According to what you have learned about matter, how can they investigate this physical change?

• Observe changes in appearance, texture, state of matter, or size without altering the chemical composition of the substance.

• Freeze the substance to extreme temperatures to observe changes

• Taste the substance to see if it changes flavor

• Mix the substance with other chemicals to observe changes

During a science experiment, Elijah mixed two chemicals together. What are some properties of the chemical changes that could be observed?

• Changes in texture

• Formation of new substances, changes in energy, changes in color, changes in temperature, production of gas

• Changes in volume

• Changes in shape

Can you provide examples of physical changes?

• Freezing water, evaporating alcohol, rusting iron

• Melting ice, boiling water, cutting paper, crushing a can

David accidentally dropped a glass of water, and the water spilled on the floor. Considering this scenario, what are some properties of the physical changes observed?

• Irreversibility

• Some properties of physical changes include reversibility, no change in chemical composition, and no formation of new substances.

• Change in chemical composition

• Formation of new substances