Midterm Science Key Vocabulary

Reversible changes can be changed back to the way it was _______.

• before

• after

• later

• never

Irreversible changes cannot be changed back to the way it was _______.

• before

• after

• later

• soon

Physical change might take a different form but no new _______ is made.

• substance

• element

• compound

• mixture

In a chemical change, a chemical reaction happens, and a new _______ is made.

• substance

• element

• mixture

• atom

Evidence is something that shows or proves something is _______.

• true

• false

• uncertain

• unproven

To react is to change or respond when something _______.

• happens

• stops

• disappears

• fails

Reactants are the substances that start a chemical _______.

• reaction

• equation

• formula

• process

Products are the new substance made after a chemical _______.

• reaction

• equation

• process

• formula

What type of rock forms from molten lava or magma that cools and solidifies?

• Igneous rocks

• Sedimentary rocks

• Metamorphic rocks

• Limestone

Sedimentary rocks form from layers of sediments like sand, mud, and pebbles that pile up over time.

• True

• False