Science Semester Exam

Front

What is the relationship between molecules and atoms?

Back

Molecules are made up of two or more atoms.

Front

What happens to the particles in a popsicle when it melts due to an increase in temperature?

Back

The particles gain thermal energy, speed up, and get farther apart.

Front

What characteristic is shared by both primary and secondary consumers?

Back

Both gain energy by eating other living things.

Front

What happens to heat energy when a balloon is placed in liquid nitrogen and shrinks?

Back

Heat energy has been removed, causing the balloon to become smaller and the molecule arrangement to be closer.

Front

What type of symbiotic relationship does a tapeworm have with a dog?

Back

Parasitism.

Front

Define 'atom'.

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

Define 'molecule'.

Back

A group of two or more atoms bonded together.

Front

What is thermal energy?

Back

The energy that comes from the temperature of matter; it is the total energy of all the particles in an object.

Front

What is the difference between primary and secondary consumers?

Back

Primary consumers eat plants (herbivores), while secondary consumers eat primary consumers (carnivores or omnivores).

Front

What is the process of melting?

Back

The transition of a substance from a solid to a liquid state due to an increase in temperature.