Mixtures
What do all mixtures have in common?
A mixture is a combination of two or more substances that do not chemically combine.
What are the physical properties of matter?
Physical properties include color, shape, size, mass, volume, and density.
If you add 50 grams of sand to 30 grams of dirt, what is the total mass?
80 grams
What forces are at play when a car rolls down a ramp?
Gravity pulls the car down, and friction slows it down.
What are the types of energy and some examples of each type?
Types of energy include kinetic (moving objects), potential (stored energy), thermal (heat), and electrical (electric current).
What are the properties of a mixture?
The properties of a mixture include that the substances retain their own properties and can be separated by physical means.
What are examples of conductors?
Metals like copper and aluminum are good conductors of electricity.
If a beaker holds 200 grams of water, what is the mass if you add 50 grams of sugar?
250 grams
What tools would you need if you were testing the distance a ball rolls down a ramp?
A ruler or measuring tape and a ball.
Explain how energy can change forms.
Energy can change forms, such as potential energy turning into kinetic energy when an object moves.
List some solutions that are a liquid and a liquid.
Examples include saltwater and vinegar mixed with water.
What are examples of insulators?
Rubber and plastic are examples of insulators that do not conduct electricity well.
If 100 grams of marbles are added to 150 grams of water, what is the total mass?
250 grams
Explain how you would investigate how a magnet works at a distance.
You could move a magnet closer or farther away from metal objects to see if they are attracted.
What is an example of sound energy?
Sound energy is produced when a guitar string vibrates.
List some solutions that are a liquid and a liquid and a solid and a liquid.
Examples include lemonade (liquid + solid sugar) and a smoothie (liquid + solid fruit).
What is mass?
Mass is the amount of matter in an object, usually measured in grams or kilograms.
A bowl contains 150 grams of fruit. You add 60 grams of yogurt on top. What is the combined mass?
210 grams
What physical properties would be necessary for a boat?
The boat should have buoyancy, stability, and a shape that reduces water resistance.
How does energy relate to motion?
Energy is required to move an object, and the motion of objects can also produce energy.
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.
What tool is used to measure mass?
A balance scale or digital scale is used to measure mass.
A jar holds 300 grams of sand. If you pour in 75 grams of pebbles, what is the total mass of the jar’s contents?
375 grams
How would you calculate the mass if you added two substances together?
Add the masses of the two substances together (e.g., mass A + mass B).
Describe how energy is transferred from one object to another.
Energy can be transferred through contact (like pushing) or at a distance (like magnetic or gravitational forces).