Matter Test 1/24

When a chemical reaction occurs, what is formed?

• A new substance

• A new element

• A new atom

• A new molecule

What is another term for a chemical change?

• Physical change

• Chemical reaction

• Physical reaction

• Matter change

Where are reactants located in a chemical equation?

• After the arrow

• Before the arrow

• Above the arrow

• Below the arrow

What does the law of conservation of mass state?

• Mass can be created

• Mass can be destroyed

• Total mass of reactants equals total mass of products

• Mass changes during a reaction

What effect does a decrease in surface area have on the rate of reaction?

• Increases the rate

• Decreases the rate

• No effect on the rate

• Stops the reaction

What are properties that can be observed without changing the identity of a substance called?

• Chemical properties

• Physical properties

• Reactive properties

• Thermal properties

What type of change is burning oil to heat a house?

• Physical change

• Chemical change

• Thermal change

• Electrical change

What indicates an endothermic reaction?

• Beaker feels warmer

• Beaker feels colder

• Beaker changes color

• Beaker bubbles

What happens in an exothermic reaction?

• Energy is absorbed

• Energy is released

• Energy is unchanged

• Energy is destroyed

What happens to the rate of reaction if a solid is broken into smaller pieces?

• Decreases

• Increases

• Stays the same

• Stops completely