EVs Flashcards
What is matter?
Matter is anything that has mass and takes up space.
True or False: Air is considered matter.
True
Fill in the blank: The three states of matter are solid, liquid, and ______.
gas
What is a solid?
A solid is a state of matter that has a definite shape and volume.
Which state of matter has a fixed volume but no fixed shape?
Liquid
True or False: Gases have a definite shape and volume.
False
What happens to the particles in a solid when it is heated?
The particles gain energy and begin to move more, which can cause the solid to melt.
Multiple Choice: Which of the following is an example of a gas? A) Ice B) Water C) Oxygen D) Rock
C) Oxygen
What is the process called when a liquid turns into a gas?
Evaporation
Fill in the blank: When a gas cools down, it can turn back into a ______.
liquid
What is a physical change?
A physical change is a change in the form or appearance of matter without changing its chemical composition.
True or False: Freezing is a physical change.
True
What is a chemical change?
A chemical change is a change that results in the formation of new chemical substances.
Multiple Choice: Which of the following is a sign of a chemical change? A) Change in color B) Change in size C) Change in state D) All of the above
A) Change in color
Fill in the blank: The smallest unit of matter is called an ______.
atom
What are molecules?
Molecules are groups of two or more atoms bonded together.
True or False: All matter can be seen with the naked eye.
False
What is density?
Density is the mass of an object divided by its volume.
Multiple Choice: Which state of matter is usually the densest? A) Gas B) Liquid C) Solid
C) Solid
What is the effect of temperature on matter?
Temperature affects the energy of particles and can change the state of matter.
Fill in the blank: When matter is heated, its particles move ______.
faster
What is an example of a gas expanding?
When you heat air in a balloon, the gas expands.
True or False: Matter can be created or destroyed in a chemical reaction.
False
What is the law of conservation of mass?
The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.
