Particles of Matter
What are the tiny particles that make up all matter called?
Atoms or molecules
What happens to the total weight of matter when a substance is heated?
The total weight remains the same; it does not change.
Name one property you could use to identify a material.
Color, texture, density, or boiling point.
What is one outcome when two liquids are mixed together?
They may form a solution, a suspension, or separate layers
Describe one property of particles that you cannot see
Particles are too small to be seen, they are in constant motion, or they have space between them.
When mixing substances, what should we remember about the weight of the mixtures?
The total weight of the substances mixed should equal the sum of their individual weights.
What is the importance of measuring properties of materials?
Measuring properties helps us distinguish between materials, which is important in science and everyday life.
How can you tell if a new substance has formed after mixing?
You can observe changes such as color change, gas production, or temperature change.
How do particles in a solid compare to those in a gas?
Particles in a solid are tightly packed and vibrate in place, while particles in a gas are far apart and move freely.
How can you graph the weight of substances before and after a change?
You can create a bar graph or line graph showing weight measurements before and after changes.
Give an example of how you can identify a material using its texture.
You can compare the texture of a smooth stone versus a rough piece of sandpaper.
What is a common example of mixing substances in everyday life?
Examples include mixing salad dressing (oil and vinegar) or making a smoothie (fruits and yogurt).
Why can't we see individual particles with our eyes?
Because they are smaller than the wavelength of visible light.
What type of changes can happen when cooling a substance?
Physical changes such as condensation or freezing can occur.
What properties might you measure to distinguish between two liquids?
You might measure boiling point, density, or viscosity.
Describe an investigation you could conduct to see if mixing two solids results in a new substance.
You could mix two powders and observe if a new compound forms or if they remain separate.
Explain how a model can help us understand the concept of matter being made of particles.
A model can represent the arrangement and movement of particles, helping us visualize something we cannot see.
Describe an experiment to show that weight is conserved when two substances are mixed.
By measuring the weight of each substance before mixing and then weighing the mixture after, you can show that the total weight remains constant.
How can color help in identifying materials?
Color can indicate the type of substance and help differentiate between similar materials.
Explain the difference between a physical change and a chemical change when mixing substances.
A physical change does not create a new substance (like melting ice), while a chemical change results in new substances (like rusting iron).