Matter
Which state of matter has a definite volume but no definite shape?
What is a liquid?
Which type of chemical reaction releases heat?
A. Exothermic
B. Endothermic
What is exothermic?
What is the main purpose of a hypothesis in an experiment?
To make a testable prediction
What is the law of conservation of mass?
Mass is conserved; it cannot be created or destroyed
What does the periodic table organize?
What are elements?
What term describes the amount of matter in an object?
Mass
Which process involves the transfer of thermal energy through direct contact?
What is conduction?
Which of the following is an example of a constant variable in an experiment?
a. The temperature at which a plant grows
b. The amount of sunlight the plant receives
c. The type of soil used for all plants
d. The height of each plant
What is c?
What happens to the total mass of substances during a chemical reaction?
It remains the same or stays the same?
Which group of elements is known for being good conductors of heat and electricity?
What are metals?
Which factor does NOT affect the state of matter?
Temperature
Pressure
Volume
Color
What is color?
Which of the following reactions absorbs energy from its surroundings?
A. Endothermic
B.Exothemric
What is endothermic?
8. What is an independent variable?
If you start with 50 grams of reactants in a chemical reaction, what should the total mass of the products be?
What is 50 grams?
Which of the following is an example of a synthetic material?
A. Cotton
B. Wood
C. Nylon
D. Steel
What is nylon?
What happens to the particles of a solid when it is heated?
They move and vibrate faster.
Which of the following is a chemical property?
A. Color
B. Density
C. Flammability
D. Melting point
What is flammability?
What is the role of the dependent variable in an experiment?
What is being measured and observed?
During a reaction in a closed container, the mass of the container and its contents is 200 grams. After the reaction, what should the mass be?
What is 200 grams?
What is mass measured in?
What is grams?
How do molecules in a gas behave compared to those in a liquid?
They move more freely and quickly
Which of the following is NOT a physical property?
A. Boiling Point
B. Reactivity with acid
C. Density
D. Color
What is b?
In what step of the scientific process do you state if your hypothesis was correct or incorrect?
What is the conclusion?
A student conducts an experiment where they mix vinegar and baking soda. The mass before and after the reaction is measured. If the initial mass was 60 grams, what should the mass be after the reaction?
What is 60 grams?
What is the difference between mass and weight?
Mass is constant; weight can change with location