Properties and Effects of Mixtures

Miss Crystal Bullet introduces the concept of cause and effect in science, using examples from everyday life and engineering. The lesson explores how different ingredients affect the stickiness of mixtures, focusing on cornstarch and gelatin. Students are encouraged to think about how heating and cooling substances can change their properties, and how this knowledge is useful in designing better products. The lesson concludes with a review of key concepts and a discussion on the importance of gathering evidence from various sources.

What is the primary focus of the initial activity in understanding cause and effect?

• To learn about historical events

• To identify cause and effect in daily life

• To solve mathematical problems

• To memorize scientific terms

How does adding cinnamon to a mixture affect it?

• It makes the mixture colorless

• It makes the mixture sour

• It adds a spicy smell and flavor

• It reduces the mixture's volume

Why is understanding cause and effect important for engineers?

• To create musical compositions

• To improve language skills

• To predict weather patterns

• To design mixtures with desired properties

What property does flour add to a mixture according to the reference book?

• It makes the mixture sour

• It makes the mixture sweet

• It makes the mixture liquid

• It makes the mixture sticky

What happens to a cornstarch and water mixture when it is heated?

• It loses its color

• It becomes thick and sticky

• It becomes less sticky

• It turns into a gas

What is a key concept when a substance does not revert to its original state after heating?

• It remains the same substance

• It becomes a new substance

• It evaporates

• It becomes invisible

What does gelatin do when mixed with water and cooled?

• It turns into a gas

• It remains unchanged

• It evaporates

• It becomes a slippery solid

What is the significance of using multiple sources of evidence in engineering?

• To confuse the audience

• To support claims more convincingly

• To reduce the cost of materials

• To speed up the design process

What is the design goal when creating glue with cornstarch and water?

• To make it sticky

• To make it edible

• To make it colorful

• To make it transparent

What is the effect of heating a cornstarch and water mixture according to the sticky tests?

• It loses its stickiness

• It becomes more sticky

• It becomes less sticky

• It becomes transparent