Mixtures
A mixture is a combination of two or more substances that do not chemically combine.
What is a mixture?
Gravity pulls the car down, and friction slows it down.
What forces are at play when a car rolls down a ramp?
Magnets attract when opposite poles (north and south) are near each other and repel when like poles (north and north or south and south) are near each other.
Show how magnets attract and repel.
Physical properties include color, shape, size, mass, volume, and density.
What are the physical properties of matter?
Types of energy include kinetic (moving objects), potential (stored energy), thermal (heat), and electrical (electric current).
What are the types of energy and some examples of each type?
Answer: Types of energy include kinetic (moving objects), potential (stored energy), thermal (heat), and electrical (electric current).
The properties of a mixture include that the substances retain their own properties and can be separated by physical means.
What are properties of a mixture?
A ruler or measuring tape and a ball.
What tools would you need if you were testing the distance a ball rolls down a ramp?
The north end of one magnet is attracted to the south end of another magnet.
Which ends of the magnets are attracted to each other?
Metals like copper and aluminum are good conductors of electricity.
What are examples of conductors?
Energy can change forms, such as potential energy turning into kinetic energy when an object moves.
Explain how energy can change forms.
Examples include saltwater and vinegar mixed with water.
What are some solutions that are a liquid and a liquid?
You could move a magnet closer or farther away from metal objects to see if they are attracted.
Explain how you would investigate how a magnet works at a distance.
The north end of one magnet is repelled by the north end of another magnet.
Which ends of the magnet are repelled from each other?
Rubber and plastic are examples of insulators that do not conduct electricity well.
What are examples of insulators?
Sound energy is produced when a guitar string vibrates.
What is an example of sound energy?
Examples include lemonade (liquid + solid sugar) and a smoothie (liquid + solid fruit).
List some solutions that are a liquid and a liquid and a solid and a liquid.
The boat should have buoyancy, stability, and a shape that reduces water resistance.
What physical properties would be necessary for a boat?
Magnets are used in refrigerator doors to keep them closed.
Give an example of a situation where magnets are used in everyday life.
Mass is the amount of matter in an object, usually measured in grams or kilograms.
What is mass?
Energy is required to move an object, and the motion of objects can also produce energy.
How does energy relate to motion?
If you had a pan balance with a car on one pan and weights on the other, what would the mass of the car be if the weights were 10g, 20g?
The mass of the car would be 30g.
Add the masses of the two substances together (e.g., mass A + mass B).
How would you calculate the mass if you added two substances together?
Use a magnet to pick up paper clips and observe how many it can hold, showing the strength of the magnet.
Describe a simple experiment to demonstrate magnetism.
A balance scale or digital scale is used to measure mass.
What tool is used to measure mass?
Energy can be transferred through contact (like pushing) or at a distance (like magnetic or gravitational forces).
Describe how energy is transferred from one object to another.