States of Matter
What are the three common states of matter?
Solid, liquid, gas.
What is an element?
A pure substance that cannot be broken down into simpler substances.
What is a physical property?
A characteristic that can be observed without changing the substance.
What are metals known for?
Good conductivity of heat and electricity, malleability, and ductility.
How do balanced forces affect motion?
Balanced forces do not change the motion of an object.
In which state of matter do particles have the most energy?
Gas
What is a compound?
A substance formed when two or more elements chemically bond together.
What property describes how a substance reacts with other substances?
Chemical property.
Name one property of nonmetals.
Dull, brittle, and poor conductivity of heat and electricity.
What is acceleration? Give a real-world example.
Acceleration is the rate of change of velocity.
What happens to the particles in a solid when it melts?
The particles gain energy and move more freely.
What is a mixture?
A combination of two or more substances that are not chemically bonded.
What is density?
A physical property that describes the amount of matter in a given space or volume
What is a metalloid?
An element with properties of both metals and nonmetals.
What does Newton's Third Law state? Provide an example
For every action, there is an equal and opposite reaction.
What is the process called when a liquid turns into a gas?
Evaporation
How can you separate a mixture?
By physical methods such as filtering, distillation, or evaporation.
How does temperature affect the state of matter?
Increasing temperature can cause solids to melt, liquids to evaporate, and gases to expand.
Name one use of metalloids.
Used in semiconductors for electronics.
How does gravity affect objects on Earth?
Gravity pulls objects toward the center of the earth.
There is a 4th state of matter that only exists in stars, what is it?
Plasma
Give an example of a compound and explain its components.
Answers will vary
What is the difference between a physical change and a chemical change?
A physical change does not alter the substance's identity, while a chemical change does.
How do metals and nonmetals differ in terms of electron behavior?
Metals tend to lose electrons and form positive ions, while nonmetals tend to gain electrons and form negative ions.
A kick force is applied to a moving soccer ball at 100N The ball pushed back with 30N. What is the Net force of the ball.
70N in the direction of the kick.